STATE STREET GLOBAL ADVISORS TRUST COMPANY has sponsored the creation of one or more 401k plans.
Submission information for form 5500 for 401k plan STATE STREET 1-3 YEAR U.S. CREDIT INDEX SECURITIES LENDING FUND
| Measure | Date | Value |
|---|
| 2023 : STATE STREET 1-3 YEAR U.S. CREDIT INDEX SECURITIES LENDING FUND 2023 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2023-12-31 | $8,456,208 |
| Total unrealized appreciation/depreciation of assets | 2023-12-31 | $8,456,208 |
| Total transfer of assets to this plan | 2023-12-31 | $143,294,762 |
| Total transfer of assets from this plan | 2023-12-31 | $341,163,823 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-12-31 | $4,446,729 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-12-31 | $10,454,794 |
| Total income from all sources (including contributions) | 2023-12-31 | $11,980,495 |
| Total loss/gain on sale of assets | 2023-12-31 | $-5,227,567 |
| Total of all expenses incurred | 2023-12-31 | $25,480 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2023-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2023-12-31 | $0 |
| Value of total assets at end of year | 2023-12-31 | $239,238,352 |
| Value of total assets at beginning of year | 2023-12-31 | $431,160,463 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2023-12-31 | $25,480 |
| Total interest from all sources | 2023-12-31 | $8,751,854 |
| Total dividends received (eg from common stock, registered investment company shares) | 2023-12-31 | $0 |
| Assets. Other investments not covered elsewhere at end of year | 2023-12-31 | $12,755,982 |
| Assets. Other investments not covered elsewhere at beginning of year | 2023-12-31 | $23,431,406 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2023-12-31 | $2,706,378 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2023-12-31 | $3,975,079 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2023-12-31 | $4,446,729 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2023-12-31 | $10,454,794 |
| Administrative expenses (other) incurred | 2023-12-31 | $108 |
| Total non interest bearing cash at end of year | 2023-12-31 | $0 |
| Total non interest bearing cash at beginning of year | 2023-12-31 | $115,728 |
| Value of net income/loss | 2023-12-31 | $11,955,015 |
| Value of net assets at end of year (total assets less liabilities) | 2023-12-31 | $234,791,623 |
| Value of net assets at beginning of year (total assets less liabilities) | 2023-12-31 | $420,705,669 |
| Interest earned on other investments | 2023-12-31 | $470,894 |
| Income. Interest from corporate debt instruments | 2023-12-31 | $8,174,148 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2023-12-31 | $5,767,550 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2023-12-31 | $11,644,549 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2023-12-31 | $11,644,549 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2023-12-31 | $106,812 |
| Asset. Corporate debt instrument preferred debt at end of year | 2023-12-31 | $144,595,686 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2023-12-31 | $0 |
| Asset. Corporate debt instrument debt (other) at end of year | 2023-12-31 | $73,412,756 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2023-12-31 | $391,993,701 |
| Contract administrator fees | 2023-12-31 | $22,020 |
| Aggregate proceeds on sale of assets | 2023-12-31 | $156,101,055 |
| Aggregate carrying amount (costs) on sale of assets | 2023-12-31 | $161,328,622 |
| Unrealized appreciation/depreciation of other (non real estate) assets | 2023-01-01 | $8,456,208 |
| Total unrealized appreciation/depreciation of assets | 2023-01-01 | $8,456,208 |
| Total transfer of assets to this plan | 2023-01-01 | $143,294,762 |
| Total transfer of assets from this plan | 2023-01-01 | $341,163,823 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-01-01 | $4,446,729 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-01-01 | $10,454,794 |
| Total income from all sources (including contributions) | 2023-01-01 | $11,980,495 |
| Total loss/gain on sale of assets | 2023-01-01 | $-5,227,567 |
| Total of all expenses incurred | 2023-01-01 | $25,480 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2023-01-01 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2023-01-01 | $0 |
| Value of total assets at end of year | 2023-01-01 | $239,238,352 |
| Value of total assets at beginning of year | 2023-01-01 | $431,160,463 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2023-01-01 | $25,480 |
| Total interest from all sources | 2023-01-01 | $8,751,854 |
| Total dividends received (eg from common stock, registered investment company shares) | 2023-01-01 | $0 |
| Assets. Other investments not covered elsewhere at end of year | 2023-01-01 | $12,755,982 |
| Assets. Other investments not covered elsewhere at beginning of year | 2023-01-01 | $23,431,406 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2023-01-01 | $2,706,378 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2023-01-01 | $3,975,079 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2023-01-01 | $4,446,729 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2023-01-01 | $10,454,794 |
| Administrative expenses (other) incurred | 2023-01-01 | $108 |
| Total non interest bearing cash at end of year | 2023-01-01 | $0 |
| Total non interest bearing cash at beginning of year | 2023-01-01 | $115,728 |
| Value of net income/loss | 2023-01-01 | $11,955,015 |
| Value of net assets at end of year (total assets less liabilities) | 2023-01-01 | $234,791,623 |
| Value of net assets at beginning of year (total assets less liabilities) | 2023-01-01 | $420,705,669 |
| Interest earned on other investments | 2023-01-01 | $470,894 |
| Income. Interest from corporate debt instruments | 2023-01-01 | $8,174,148 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2023-01-01 | $5,767,550 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2023-01-01 | $106,812 |
| Asset. Corporate debt instrument preferred debt at end of year | 2023-01-01 | $144,595,686 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2023-01-01 | $0 |
| Asset. Corporate debt instrument debt (other) at end of year | 2023-01-01 | $73,412,756 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2023-01-01 | $391,993,701 |
| Contract administrator fees | 2023-01-01 | $22,020 |
| Aggregate proceeds on sale of assets | 2023-01-01 | $156,101,055 |
| Aggregate carrying amount (costs) on sale of assets | 2023-01-01 | $161,328,622 |
| 2022 : STATE STREET 1-3 YEAR U.S. CREDIT INDEX SECURITIES LENDING FUND 2022 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2022-12-31 | $-13,078,075 |
| Total unrealized appreciation/depreciation of assets | 2022-12-31 | $-13,078,075 |
| Total transfer of assets to this plan | 2022-12-31 | $295,723,278 |
| Total transfer of assets from this plan | 2022-12-31 | $30,065,420 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-12-31 | $10,454,794 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-12-31 | $14,956,576 |
| Total income from all sources (including contributions) | 2022-12-31 | $-9,000,101 |
| Total loss/gain on sale of assets | 2022-12-31 | $-2,981,912 |
| Total of all expenses incurred | 2022-12-31 | $40,606 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2022-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2022-12-31 | $0 |
| Value of total assets at end of year | 2022-12-31 | $431,160,463 |
| Value of total assets at beginning of year | 2022-12-31 | $179,045,094 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2022-12-31 | $40,606 |
| Total interest from all sources | 2022-12-31 | $7,059,886 |
| Total dividends received (eg from common stock, registered investment company shares) | 2022-12-31 | $0 |
| Administrative expenses professional fees incurred | 2022-12-31 | $4,061 |
| Assets. Other investments not covered elsewhere at end of year | 2022-12-31 | $23,431,406 |
| Assets. Other investments not covered elsewhere at beginning of year | 2022-12-31 | $11,583,624 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2022-12-31 | $3,975,079 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2022-12-31 | $1,797,593 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2022-12-31 | $10,454,794 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2022-12-31 | $14,956,576 |
| Administrative expenses (other) incurred | 2022-12-31 | $36,545 |
| Total non interest bearing cash at end of year | 2022-12-31 | $115,728 |
| Total non interest bearing cash at beginning of year | 2022-12-31 | $0 |
| Value of net income/loss | 2022-12-31 | $-9,040,707 |
| Value of net assets at end of year (total assets less liabilities) | 2022-12-31 | $420,705,669 |
| Value of net assets at beginning of year (total assets less liabilities) | 2022-12-31 | $164,088,518 |
| Interest earned on other investments | 2022-12-31 | $160,200 |
| Income. Interest from corporate debt instruments | 2022-12-31 | $6,841,533 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2022-12-31 | $11,644,549 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2022-12-31 | $14,673,130 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2022-12-31 | $14,673,130 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2022-12-31 | $58,153 |
| Asset. Corporate debt instrument preferred debt at end of year | 2022-12-31 | $0 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2022-12-31 | $90,330,474 |
| Asset. Corporate debt instrument debt (other) at end of year | 2022-12-31 | $391,993,701 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2022-12-31 | $60,660,273 |
| Aggregate proceeds on sale of assets | 2022-12-31 | $247,606,123 |
| Aggregate carrying amount (costs) on sale of assets | 2022-12-31 | $250,588,035 |
| Unrealized appreciation/depreciation of other (non real estate) assets | 2022-01-01 | $-13,078,075 |
| Total unrealized appreciation/depreciation of assets | 2022-01-01 | $-13,078,075 |
| Total transfer of assets to this plan | 2022-01-01 | $295,723,278 |
| Total transfer of assets from this plan | 2022-01-01 | $30,065,420 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-01-01 | $10,454,794 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-01-01 | $14,956,576 |
| Total income from all sources (including contributions) | 2022-01-01 | $-9,000,101 |
| Total loss/gain on sale of assets | 2022-01-01 | $-2,981,912 |
| Total of all expenses incurred | 2022-01-01 | $40,606 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2022-01-01 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2022-01-01 | $0 |
| Value of total assets at end of year | 2022-01-01 | $431,160,463 |
| Value of total assets at beginning of year | 2022-01-01 | $179,045,094 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2022-01-01 | $40,606 |
| Total interest from all sources | 2022-01-01 | $7,059,886 |
| Total dividends received (eg from common stock, registered investment company shares) | 2022-01-01 | $0 |
| Administrative expenses professional fees incurred | 2022-01-01 | $4,061 |
| Assets. Other investments not covered elsewhere at end of year | 2022-01-01 | $23,431,406 |
| Assets. Other investments not covered elsewhere at beginning of year | 2022-01-01 | $11,583,624 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2022-01-01 | $3,975,079 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2022-01-01 | $1,797,593 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2022-01-01 | $10,454,794 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2022-01-01 | $14,956,576 |
| Administrative expenses (other) incurred | 2022-01-01 | $36,545 |
| Total non interest bearing cash at end of year | 2022-01-01 | $115,728 |
| Total non interest bearing cash at beginning of year | 2022-01-01 | $0 |
| Value of net income/loss | 2022-01-01 | $-9,040,707 |
| Value of net assets at end of year (total assets less liabilities) | 2022-01-01 | $420,705,669 |
| Value of net assets at beginning of year (total assets less liabilities) | 2022-01-01 | $164,088,518 |
| Interest earned on other investments | 2022-01-01 | $160,200 |
| Income. Interest from corporate debt instruments | 2022-01-01 | $6,841,533 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2022-01-01 | $11,644,549 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2022-01-01 | $58,153 |
| Asset. Corporate debt instrument preferred debt at end of year | 2022-01-01 | $0 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2022-01-01 | $90,330,474 |
| Asset. Corporate debt instrument debt (other) at end of year | 2022-01-01 | $391,993,701 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2022-01-01 | $60,660,273 |
| Aggregate proceeds on sale of assets | 2022-01-01 | $247,606,123 |
| Aggregate carrying amount (costs) on sale of assets | 2022-01-01 | $250,588,035 |
| 2021 : STATE STREET 1-3 YEAR U.S. CREDIT INDEX SECURITIES LENDING FUND 2021 401k financial data |
|---|
| Unrealized appreciation/depreciation of real estate assets | 2021-12-31 | $0 |
| Unrealized appreciation/depreciation of other (non real estate) assets | 2021-12-31 | $-689,151 |
| Total unrealized appreciation/depreciation of assets | 2021-12-31 | $-689,151 |
| Total transfer of assets to this plan | 2021-12-31 | $90,446,357 |
| Total transfer of assets from this plan | 2021-12-31 | $36,054,425 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2021-12-31 | $14,956,576 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2021-12-31 | $8,066,828 |
| Expenses. Interest paid | 2021-12-31 | $0 |
| Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102 | 2021-12-31 | $0 |
| Total income from all sources (including contributions) | 2021-12-31 | $-181,481 |
| Total loss/gain on sale of assets | 2021-12-31 | $-663,316 |
| Total of all expenses incurred | 2021-12-31 | $15,693 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2021-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2021-12-31 | $0 |
| Value of total assets at end of year | 2021-12-31 | $179,045,094 |
| Value of total assets at beginning of year | 2021-12-31 | $117,960,588 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2021-12-31 | $15,693 |
| Total interest from all sources | 2021-12-31 | $1,337,768 |
| Total dividends received (eg from common stock, registered investment company shares) | 2021-12-31 | $0 |
| Total dividends received from registered investment company shares (eg mutual funds) | 2021-12-31 | $0 |
| Administrative expenses professional fees incurred | 2021-12-31 | $3,170 |
| Assets. Corporate prefeered stocks other than exployer securities at end of year | 2021-12-31 | $0 |
| Assets. Corporate prefeered stocks other than exployer securities at beginning of year | 2021-12-31 | $0 |
| Assets. Other investments not covered elsewhere at end of year | 2021-12-31 | $11,583,624 |
| Assets. Other investments not covered elsewhere at beginning of year | 2021-12-31 | $7,449,909 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2021-12-31 | $1,797,593 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2021-12-31 | $1,487,229 |
| Assets. Loans (other than to participants) at end of year | 2021-12-31 | $0 |
| Assets. Loans (other than to participants) at beginning of year | 2021-12-31 | $0 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2021-12-31 | $14,956,576 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2021-12-31 | $8,066,828 |
| Other income not declared elsewhere | 2021-12-31 | $0 |
| Administrative expenses (other) incurred | 2021-12-31 | $12,523 |
| Total non interest bearing cash at end of year | 2021-12-31 | $0 |
| Total non interest bearing cash at beginning of year | 2021-12-31 | $0 |
| Value of net income/loss | 2021-12-31 | $-197,174 |
| Value of net assets at end of year (total assets less liabilities) | 2021-12-31 | $164,088,518 |
| Value of net assets at beginning of year (total assets less liabilities) | 2021-12-31 | $109,893,760 |
| Investment advisory and management fees | 2021-12-31 | $0 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2021-12-31 | $0 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2021-12-31 | $0 |
| Income. Interest from loans (other than to participants) | 2021-12-31 | $0 |
| Interest earned on other investments | 2021-12-31 | $0 |
| Income. Interest from US Government securities | 2021-12-31 | $0 |
| Income. Interest from corporate debt instruments | 2021-12-31 | $1,335,868 |
| Value of interest in common/collective trusts at end of year | 2021-12-31 | $0 |
| Value of interest in common/collective trusts at beginning of year | 2021-12-31 | $0 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2021-12-31 | $14,673,130 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2021-12-31 | $7,480,062 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2021-12-31 | $7,480,062 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2021-12-31 | $1,900 |
| Value of funds held in insurance company general accounts (unallocated contracts) at end of year | 2021-12-31 | $0 |
| Value of funds held in insurance company general accounts (unallocated contracts) at beginning of year | 2021-12-31 | $0 |
| Asset value of US Government securities at end of year | 2021-12-31 | $0 |
| Asset value of US Government securities at beginning of year | 2021-12-31 | $0 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2021-12-31 | $0 |
| Net investment gain or loss from common/collective trusts | 2021-12-31 | $-166,782 |
| Income. Dividends from preferred stock | 2021-12-31 | $0 |
| Income. Dividends from common stock | 2021-12-31 | $0 |
| Asset. Corporate debt instrument preferred debt at end of year | 2021-12-31 | $90,330,474 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2021-12-31 | $64,091,978 |
| Asset. Corporate debt instrument debt (other) at end of year | 2021-12-31 | $60,660,273 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2021-12-31 | $37,451,410 |
| Contract administrator fees | 2021-12-31 | $0 |
| Assets. Corporate common stocks other than exployer securities at end of year | 2021-12-31 | $0 |
| Assets. Corporate common stocks other than exployer securities at beginning of year | 2021-12-31 | $0 |
| Aggregate proceeds on sale of assets | 2021-12-31 | $68,857,836 |
| Aggregate carrying amount (costs) on sale of assets | 2021-12-31 | $69,521,152 |
| 2020 : STATE STREET 1-3 YEAR U.S. CREDIT INDEX SECURITIES LENDING FUND 2020 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2020-12-31 | $1,941,858 |
| Total unrealized appreciation/depreciation of assets | 2020-12-31 | $1,941,858 |
| Total transfer of assets to this plan | 2020-12-31 | $29,719,368 |
| Total transfer of assets from this plan | 2020-12-31 | $30,031,768 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2020-12-31 | $8,066,828 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2020-12-31 | $6,851,112 |
| Total income from all sources (including contributions) | 2020-12-31 | $3,943,160 |
| Total loss/gain on sale of assets | 2020-12-31 | $-422,079 |
| Total of all expenses incurred | 2020-12-31 | $13,513 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2020-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2020-12-31 | $0 |
| Value of total assets at end of year | 2020-12-31 | $117,960,588 |
| Value of total assets at beginning of year | 2020-12-31 | $113,127,625 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2020-12-31 | $13,513 |
| Total interest from all sources | 2020-12-31 | $2,423,381 |
| Total dividends received (eg from common stock, registered investment company shares) | 2020-12-31 | $0 |
| Administrative expenses professional fees incurred | 2020-12-31 | $2,257 |
| Assets. Other investments not covered elsewhere at end of year | 2020-12-31 | $7,449,909 |
| Assets. Other investments not covered elsewhere at beginning of year | 2020-12-31 | $5,926,823 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2020-12-31 | $1,487,229 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2020-12-31 | $2,098,536 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2020-12-31 | $8,066,828 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2020-12-31 | $6,851,112 |
| Administrative expenses (other) incurred | 2020-12-31 | $11,256 |
| Value of net income/loss | 2020-12-31 | $3,929,647 |
| Value of net assets at end of year (total assets less liabilities) | 2020-12-31 | $109,893,760 |
| Value of net assets at beginning of year (total assets less liabilities) | 2020-12-31 | $106,276,513 |
| Interest earned on other investments | 2020-12-31 | $162,728 |
| Income. Interest from corporate debt instruments | 2020-12-31 | $2,254,096 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2020-12-31 | $7,480,062 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2020-12-31 | $5,803,473 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2020-12-31 | $5,803,473 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2020-12-31 | $6,557 |
| Asset. Corporate debt instrument preferred debt at end of year | 2020-12-31 | $64,091,978 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2020-12-31 | $64,999,665 |
| Asset. Corporate debt instrument debt (other) at end of year | 2020-12-31 | $37,451,410 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2020-12-31 | $34,299,128 |
| Aggregate proceeds on sale of assets | 2020-12-31 | $127,774,659 |
| Aggregate carrying amount (costs) on sale of assets | 2020-12-31 | $128,196,738 |
| 2019 : STATE STREET 1-3 YEAR U.S. CREDIT INDEX SECURITIES LENDING FUND 2019 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2019-12-31 | $1,760,307 |
| Total unrealized appreciation/depreciation of assets | 2019-12-31 | $1,760,307 |
| Total transfer of assets to this plan | 2019-12-31 | $30,205,397 |
| Total transfer of assets from this plan | 2019-12-31 | $55,793,526 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $6,851,112 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $13,570,348 |
| Total income from all sources (including contributions) | 2019-12-31 | $5,933,655 |
| Total loss/gain on sale of assets | 2019-12-31 | $750,542 |
| Total of all expenses incurred | 2019-12-31 | $14,732 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2019-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2019-12-31 | $0 |
| Value of total assets at end of year | 2019-12-31 | $113,127,625 |
| Value of total assets at beginning of year | 2019-12-31 | $139,516,067 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2019-12-31 | $14,732 |
| Total interest from all sources | 2019-12-31 | $3,422,806 |
| Total dividends received (eg from common stock, registered investment company shares) | 2019-12-31 | $0 |
| Administrative expenses professional fees incurred | 2019-12-31 | $1,934 |
| Assets. Other investments not covered elsewhere at end of year | 2019-12-31 | $5,926,823 |
| Assets. Other investments not covered elsewhere at beginning of year | 2019-12-31 | $5,484,243 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2019-12-31 | $2,098,536 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2019-12-31 | $3,044,880 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2019-12-31 | $6,851,112 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2019-12-31 | $13,570,348 |
| Administrative expenses (other) incurred | 2019-12-31 | $12,798 |
| Value of net income/loss | 2019-12-31 | $5,918,923 |
| Value of net assets at end of year (total assets less liabilities) | 2019-12-31 | $106,276,513 |
| Value of net assets at beginning of year (total assets less liabilities) | 2019-12-31 | $125,945,719 |
| Interest earned on other investments | 2019-12-31 | $199,032 |
| Income. Interest from corporate debt instruments | 2019-12-31 | $3,208,260 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2019-12-31 | $5,803,473 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2019-12-31 | $12,005,816 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2019-12-31 | $12,005,816 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2019-12-31 | $15,514 |
| Asset. Corporate debt instrument preferred debt at end of year | 2019-12-31 | $64,999,665 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2019-12-31 | $79,996,444 |
| Asset. Corporate debt instrument debt (other) at end of year | 2019-12-31 | $34,299,128 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2019-12-31 | $38,984,684 |
| Aggregate proceeds on sale of assets | 2019-12-31 | $70,300,150 |
| Aggregate carrying amount (costs) on sale of assets | 2019-12-31 | $69,549,608 |
| 2018 : STATE STREET 1-3 YEAR U.S. CREDIT INDEX SECURITIES LENDING FUND 2018 401k financial data |
|---|
| Unrealized appreciation/depreciation of real estate assets | 2018-12-31 | $0 |
| Unrealized appreciation/depreciation of other (non real estate) assets | 2018-12-31 | $-359,236 |
| Total unrealized appreciation/depreciation of assets | 2018-12-31 | $-359,236 |
| Total transfer of assets to this plan | 2018-12-31 | $25,958,789 |
| Total transfer of assets from this plan | 2018-12-31 | $20,760,532 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2018-12-31 | $13,570,348 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2018-12-31 | $9,384,764 |
| Expenses. Interest paid | 2018-12-31 | $0 |
| Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102 | 2018-12-31 | $0 |
| Total income from all sources (including contributions) | 2018-12-31 | $2,065,233 |
| Total loss/gain on sale of assets | 2018-12-31 | $-459,888 |
| Total of all expenses incurred | 2018-12-31 | $14,314 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2018-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2018-12-31 | $0 |
| Value of total assets at end of year | 2018-12-31 | $139,516,067 |
| Value of total assets at beginning of year | 2018-12-31 | $128,081,307 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2018-12-31 | $14,314 |
| Total interest from all sources | 2018-12-31 | $2,884,357 |
| Total dividends received (eg from common stock, registered investment company shares) | 2018-12-31 | $0 |
| Total dividends received from registered investment company shares (eg mutual funds) | 2018-12-31 | $0 |
| Assets. Real estate other than employer real property at end of year | 2018-12-31 | $0 |
| Assets. Real estate other than employer real property at beginning of year | 2018-12-31 | $0 |
| Administrative expenses professional fees incurred | 2018-12-31 | $1,960 |
| Assets. Other investments not covered elsewhere at end of year | 2018-12-31 | $5,484,243 |
| Assets. Other investments not covered elsewhere at beginning of year | 2018-12-31 | $6,618,420 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2018-12-31 | $3,044,880 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2018-12-31 | $2,237,786 |
| Assets. Loans (other than to participants) at end of year | 2018-12-31 | $0 |
| Assets. Loans (other than to participants) at beginning of year | 2018-12-31 | $0 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2018-12-31 | $13,570,348 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2018-12-31 | $9,384,764 |
| Other income not declared elsewhere | 2018-12-31 | $0 |
| Administrative expenses (other) incurred | 2018-12-31 | $12,354 |
| Total non interest bearing cash at end of year | 2018-12-31 | $0 |
| Total non interest bearing cash at beginning of year | 2018-12-31 | $0 |
| Value of net income/loss | 2018-12-31 | $2,050,919 |
| Value of net assets at end of year (total assets less liabilities) | 2018-12-31 | $125,945,719 |
| Value of net assets at beginning of year (total assets less liabilities) | 2018-12-31 | $118,696,543 |
| Investment advisory and management fees | 2018-12-31 | $0 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2018-12-31 | $0 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2018-12-31 | $0 |
| Income. Interest from loans (other than to participants) | 2018-12-31 | $0 |
| Interest earned on other investments | 2018-12-31 | $157,863 |
| Income. Interest from US Government securities | 2018-12-31 | $0 |
| Income. Interest from corporate debt instruments | 2018-12-31 | $2,712,154 |
| Value of interest in common/collective trusts at end of year | 2018-12-31 | $0 |
| Value of interest in common/collective trusts at beginning of year | 2018-12-31 | $0 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2018-12-31 | $12,005,816 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2018-12-31 | $8,045,190 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2018-12-31 | $8,045,190 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2018-12-31 | $14,340 |
| Value of funds held in insurance company general accounts (unallocated contracts) at end of year | 2018-12-31 | $0 |
| Value of funds held in insurance company general accounts (unallocated contracts) at beginning of year | 2018-12-31 | $0 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2018-12-31 | $0 |
| Net investment gain or loss from common/collective trusts | 2018-12-31 | $0 |
| Income. Dividends from preferred stock | 2018-12-31 | $0 |
| Income. Dividends from common stock | 2018-12-31 | $0 |
| Asset. Corporate debt instrument preferred debt at end of year | 2018-12-31 | $79,996,444 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2018-12-31 | $75,160,775 |
| Asset. Corporate debt instrument debt (other) at end of year | 2018-12-31 | $38,984,684 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2018-12-31 | $36,019,136 |
| Contract administrator fees | 2018-12-31 | $0 |
| Assets. Corporate common stocks other than exployer securities at end of year | 2018-12-31 | $0 |
| Assets. Corporate common stocks other than exployer securities at beginning of year | 2018-12-31 | $0 |
| Aggregate proceeds on sale of assets | 2018-12-31 | $64,657,315 |
| Aggregate carrying amount (costs) on sale of assets | 2018-12-31 | $65,117,203 |
| 2017 : STATE STREET 1-3 YEAR U.S. CREDIT INDEX SECURITIES LENDING FUND 2017 401k financial data |
|---|
| Unrealized appreciation/depreciation of real estate assets | 2017-12-31 | $0 |
| Unrealized appreciation/depreciation of other (non real estate) assets | 2017-12-31 | $-163,835 |
| Total unrealized appreciation/depreciation of assets | 2017-12-31 | $-163,835 |
| Total transfer of assets to this plan | 2017-12-31 | $173,709,791 |
| Total transfer of assets from this plan | 2017-12-31 | $181,598,014 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2017-12-31 | $9,384,764 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2017-12-31 | $7,216,638 |
| Expenses. Interest paid | 2017-12-31 | $0 |
| Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102 | 2017-12-31 | $0 |
| Total income from all sources (including contributions) | 2017-12-31 | $2,023,963 |
| Total loss/gain on sale of assets | 2017-12-31 | $-255,604 |
| Total of all expenses incurred | 2017-12-31 | $18,367 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2017-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2017-12-31 | $0 |
| Value of total assets at end of year | 2017-12-31 | $128,081,307 |
| Value of total assets at beginning of year | 2017-12-31 | $131,795,808 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2017-12-31 | $18,367 |
| Total interest from all sources | 2017-12-31 | $2,443,402 |
| Total dividends received (eg from common stock, registered investment company shares) | 2017-12-31 | $0 |
| Total dividends received from registered investment company shares (eg mutual funds) | 2017-12-31 | $0 |
| Administrative expenses professional fees incurred | 2017-12-31 | $2,403 |
| Assets. Other investments not covered elsewhere at end of year | 2017-12-31 | $6,618,420 |
| Assets. Other investments not covered elsewhere at beginning of year | 2017-12-31 | $5,845,906 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2017-12-31 | $2,237,786 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2017-12-31 | $3,560,147 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2017-12-31 | $9,384,764 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2017-12-31 | $7,216,638 |
| Other income not declared elsewhere | 2017-12-31 | $0 |
| Administrative expenses (other) incurred | 2017-12-31 | $15,964 |
| Total non interest bearing cash at end of year | 2017-12-31 | $0 |
| Total non interest bearing cash at beginning of year | 2017-12-31 | $959 |
| Value of net income/loss | 2017-12-31 | $2,005,596 |
| Value of net assets at end of year (total assets less liabilities) | 2017-12-31 | $118,696,543 |
| Value of net assets at beginning of year (total assets less liabilities) | 2017-12-31 | $124,579,170 |
| Investment advisory and management fees | 2017-12-31 | $0 |
| Income. Interest from loans (other than to participants) | 2017-12-31 | $0 |
| Interest earned on other investments | 2017-12-31 | $146,793 |
| Income. Interest from US Government securities | 2017-12-31 | $0 |
| Income. Interest from corporate debt instruments | 2017-12-31 | $2,289,627 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2017-12-31 | $8,045,190 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2017-12-31 | $4,745,132 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2017-12-31 | $4,745,132 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2017-12-31 | $6,982 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2017-12-31 | $0 |
| Net investment gain or loss from common/collective trusts | 2017-12-31 | $0 |
| Income. Dividends from preferred stock | 2017-12-31 | $0 |
| Income. Dividends from common stock | 2017-12-31 | $0 |
| Asset. Corporate debt instrument preferred debt at end of year | 2017-12-31 | $75,160,775 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2017-12-31 | $77,374,626 |
| Asset. Corporate debt instrument debt (other) at end of year | 2017-12-31 | $36,019,136 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2017-12-31 | $40,269,038 |
| Contract administrator fees | 2017-12-31 | $0 |
| Aggregate proceeds on sale of assets | 2017-12-31 | $76,083,201 |
| Aggregate carrying amount (costs) on sale of assets | 2017-12-31 | $76,338,805 |
| 2016 : STATE STREET 1-3 YEAR U.S. CREDIT INDEX SECURITIES LENDING FUND 2016 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2016-12-31 | $553,235 |
| Total unrealized appreciation/depreciation of assets | 2016-12-31 | $553,235 |
| Total transfer of assets to this plan | 2016-12-31 | $20,746,239 |
| Total transfer of assets from this plan | 2016-12-31 | $26,479,134 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2016-12-31 | $7,216,638 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2016-12-31 | $8,526,423 |
| Expenses. Interest paid | 2016-12-31 | $0 |
| Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102 | 2016-12-31 | $0 |
| Total income from all sources (including contributions) | 2016-12-31 | $2,676,483 |
| Total loss/gain on sale of assets | 2016-12-31 | $-64,900 |
| Total of all expenses incurred | 2016-12-31 | $18,487 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2016-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2016-12-31 | $0 |
| Value of total assets at end of year | 2016-12-31 | $131,795,808 |
| Value of total assets at beginning of year | 2016-12-31 | $136,180,492 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2016-12-31 | $18,487 |
| Total interest from all sources | 2016-12-31 | $2,188,148 |
| Total dividends received (eg from common stock, registered investment company shares) | 2016-12-31 | $0 |
| Administrative expenses professional fees incurred | 2016-12-31 | $2,623 |
| Assets. Other investments not covered elsewhere at end of year | 2016-12-31 | $5,845,906 |
| Assets. Other investments not covered elsewhere at beginning of year | 2016-12-31 | $6,794,717 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2016-12-31 | $3,560,147 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2016-12-31 | $2,968,080 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2016-12-31 | $7,216,638 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2016-12-31 | $8,526,423 |
| Administrative expenses (other) incurred | 2016-12-31 | $15,864 |
| Total non interest bearing cash at end of year | 2016-12-31 | $959 |
| Total non interest bearing cash at beginning of year | 2016-12-31 | $0 |
| Value of net income/loss | 2016-12-31 | $2,657,996 |
| Value of net assets at end of year (total assets less liabilities) | 2016-12-31 | $124,579,170 |
| Value of net assets at beginning of year (total assets less liabilities) | 2016-12-31 | $127,654,069 |
| Interest earned on other investments | 2016-12-31 | $104,841 |
| Income. Interest from corporate debt instruments | 2016-12-31 | $2,077,252 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2016-12-31 | $4,745,132 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2016-12-31 | $6,538,167 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2016-12-31 | $6,538,167 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2016-12-31 | $6,055 |
| Asset. Corporate debt instrument preferred debt at end of year | 2016-12-31 | $77,374,626 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2016-12-31 | $82,388,210 |
| Asset. Corporate debt instrument debt (other) at end of year | 2016-12-31 | $40,269,038 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2016-12-31 | $37,491,318 |
| Aggregate proceeds on sale of assets | 2016-12-31 | $81,781,268 |
| Aggregate carrying amount (costs) on sale of assets | 2016-12-31 | $81,846,168 |
| 2015 : STATE STREET 1-3 YEAR U.S. CREDIT INDEX SECURITIES LENDING FUND 2015 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2015-12-31 | $94,320 |
| Total unrealized appreciation/depreciation of assets | 2015-12-31 | $94,320 |
| Total transfer of assets to this plan | 2015-12-31 | $26,161,924 |
| Total transfer of assets from this plan | 2015-12-31 | $55,435,558 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2015-12-31 | $8,526,423 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2015-12-31 | $20,227,618 |
| Total income from all sources (including contributions) | 2015-12-31 | $1,404,772 |
| Total loss/gain on sale of assets | 2015-12-31 | $-659,637 |
| Total of all expenses incurred | 2015-12-31 | $19,223 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2015-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2015-12-31 | $0 |
| Value of total assets at end of year | 2015-12-31 | $136,180,492 |
| Value of total assets at beginning of year | 2015-12-31 | $175,769,772 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2015-12-31 | $19,223 |
| Total interest from all sources | 2015-12-31 | $1,970,089 |
| Total dividends received (eg from common stock, registered investment company shares) | 2015-12-31 | $0 |
| Administrative expenses professional fees incurred | 2015-12-31 | $2,773 |
| Assets. Other investments not covered elsewhere at end of year | 2015-12-31 | $6,794,717 |
| Assets. Other investments not covered elsewhere at beginning of year | 2015-12-31 | $11,709,636 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2015-12-31 | $2,968,080 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2015-12-31 | $5,907,802 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2015-12-31 | $8,526,423 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2015-12-31 | $20,227,618 |
| Administrative expenses (other) incurred | 2015-12-31 | $16,450 |
| Value of net income/loss | 2015-12-31 | $1,385,549 |
| Value of net assets at end of year (total assets less liabilities) | 2015-12-31 | $127,654,069 |
| Value of net assets at beginning of year (total assets less liabilities) | 2015-12-31 | $155,542,154 |
| Interest earned on other investments | 2015-12-31 | $144,893 |
| Income. Interest from corporate debt instruments | 2015-12-31 | $1,823,298 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2015-12-31 | $6,538,167 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2015-12-31 | $15,588,185 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2015-12-31 | $15,588,185 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2015-12-31 | $1,898 |
| Asset. Corporate debt instrument preferred debt at end of year | 2015-12-31 | $82,388,210 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2015-12-31 | $105,210,048 |
| Asset. Corporate debt instrument debt (other) at end of year | 2015-12-31 | $37,491,318 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2015-12-31 | $37,354,101 |
| Aggregate proceeds on sale of assets | 2015-12-31 | $83,535,001 |
| Aggregate carrying amount (costs) on sale of assets | 2015-12-31 | $84,194,638 |
| 2014 : STATE STREET 1-3 YEAR U.S. CREDIT INDEX SECURITIES LENDING FUND 2014 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2014-12-31 | $404,236 |
| Total unrealized appreciation/depreciation of assets | 2014-12-31 | $404,236 |
| Total transfer of assets to this plan | 2014-12-31 | $53,327,624 |
| Total transfer of assets from this plan | 2014-12-31 | $68,392,120 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2014-12-31 | $20,227,618 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2014-12-31 | $16,030,324 |
| Total income from all sources (including contributions) | 2014-12-31 | $1,728,581 |
| Total loss/gain on sale of assets | 2014-12-31 | $-592,782 |
| Total of all expenses incurred | 2014-12-31 | $22,442 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2014-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2014-12-31 | $0 |
| Value of total assets at end of year | 2014-12-31 | $175,769,772 |
| Value of total assets at beginning of year | 2014-12-31 | $184,930,835 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2014-12-31 | $22,442 |
| Total interest from all sources | 2014-12-31 | $1,917,127 |
| Total dividends received (eg from common stock, registered investment company shares) | 2014-12-31 | $0 |
| Administrative expenses professional fees incurred | 2014-12-31 | $3,220 |
| Assets. Other investments not covered elsewhere at end of year | 2014-12-31 | $11,709,636 |
| Assets. Other investments not covered elsewhere at beginning of year | 2014-12-31 | $12,755,396 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2014-12-31 | $5,907,802 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2014-12-31 | $2,964,365 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2014-12-31 | $20,227,618 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2014-12-31 | $16,030,324 |
| Administrative expenses (other) incurred | 2014-12-31 | $19,222 |
| Value of net income/loss | 2014-12-31 | $1,706,139 |
| Value of net assets at end of year (total assets less liabilities) | 2014-12-31 | $155,542,154 |
| Value of net assets at beginning of year (total assets less liabilities) | 2014-12-31 | $168,900,511 |
| Interest earned on other investments | 2014-12-31 | $172,820 |
| Income. Interest from corporate debt instruments | 2014-12-31 | $1,741,607 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2014-12-31 | $15,588,185 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2014-12-31 | $14,937,683 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2014-12-31 | $14,937,683 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2014-12-31 | $2,700 |
| Asset. Corporate debt instrument preferred debt at end of year | 2014-12-31 | $105,210,048 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2014-12-31 | $119,014,131 |
| Asset. Corporate debt instrument debt (other) at end of year | 2014-12-31 | $37,354,101 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2014-12-31 | $35,259,260 |
| Aggregate proceeds on sale of assets | 2014-12-31 | $90,468,963 |
| Aggregate carrying amount (costs) on sale of assets | 2014-12-31 | $91,061,745 |
| 2013 : STATE STREET 1-3 YEAR U.S. CREDIT INDEX SECURITIES LENDING FUND 2013 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2013-12-31 | $1,086,526 |
| Total unrealized appreciation/depreciation of assets | 2013-12-31 | $1,086,526 |
| Total transfer of assets to this plan | 2013-12-31 | $59,939,632 |
| Total transfer of assets from this plan | 2013-12-31 | $62,590,631 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2013-12-31 | $16,030,324 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2013-12-31 | $22,147,790 |
| Total income from all sources (including contributions) | 2013-12-31 | $2,498,026 |
| Total loss/gain on sale of assets | 2013-12-31 | $-1,076,416 |
| Total of all expenses incurred | 2013-12-31 | $39,621 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2013-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2013-12-31 | $0 |
| Value of total assets at end of year | 2013-12-31 | $184,930,835 |
| Value of total assets at beginning of year | 2013-12-31 | $191,240,895 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2013-12-31 | $39,621 |
| Total interest from all sources | 2013-12-31 | $2,487,916 |
| Total dividends received (eg from common stock, registered investment company shares) | 2013-12-31 | $0 |
| Administrative expenses professional fees incurred | 2013-12-31 | $3,781 |
| Assets. Other investments not covered elsewhere at end of year | 2013-12-31 | $12,755,396 |
| Assets. Other investments not covered elsewhere at beginning of year | 2013-12-31 | $12,485,524 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2013-12-31 | $2,964,365 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2013-12-31 | $3,075,700 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2013-12-31 | $16,030,324 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2013-12-31 | $22,147,790 |
| Administrative expenses (other) incurred | 2013-12-31 | $35,840 |
| Value of net income/loss | 2013-12-31 | $2,458,405 |
| Value of net assets at end of year (total assets less liabilities) | 2013-12-31 | $168,900,511 |
| Value of net assets at beginning of year (total assets less liabilities) | 2013-12-31 | $169,093,105 |
| Interest earned on other investments | 2013-12-31 | $213,954 |
| Income. Interest from corporate debt instruments | 2013-12-31 | $2,270,271 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2013-12-31 | $14,937,683 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2013-12-31 | $19,931,103 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2013-12-31 | $19,931,103 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2013-12-31 | $3,691 |
| Asset. Corporate debt instrument preferred debt at end of year | 2013-12-31 | $119,014,131 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2013-12-31 | $123,514,426 |
| Asset. Corporate debt instrument debt (other) at end of year | 2013-12-31 | $35,259,260 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2013-12-31 | $32,234,142 |
| Aggregate proceeds on sale of assets | 2013-12-31 | $114,002,993 |
| Aggregate carrying amount (costs) on sale of assets | 2013-12-31 | $115,079,409 |
| 2012 : STATE STREET 1-3 YEAR U.S. CREDIT INDEX SECURITIES LENDING FUND 2012 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2012-12-31 | $2,993,577 |
| Total unrealized appreciation/depreciation of assets | 2012-12-31 | $2,993,577 |
| Total transfer of assets to this plan | 2012-12-31 | $49,495,341 |
| Total transfer of assets from this plan | 2012-12-31 | $42,313,932 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2012-12-31 | $22,147,790 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2012-12-31 | $22,359,718 |
| Total income from all sources (including contributions) | 2012-12-31 | $5,781,896 |
| Total loss/gain on sale of assets | 2012-12-31 | $-105,984 |
| Total of all expenses incurred | 2012-12-31 | $41,400 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2012-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2012-12-31 | $0 |
| Value of total assets at end of year | 2012-12-31 | $191,240,895 |
| Value of total assets at beginning of year | 2012-12-31 | $178,530,918 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2012-12-31 | $41,400 |
| Total interest from all sources | 2012-12-31 | $2,894,303 |
| Total dividends received (eg from common stock, registered investment company shares) | 2012-12-31 | $0 |
| Administrative expenses professional fees incurred | 2012-12-31 | $3,646 |
| Assets. Other investments not covered elsewhere at end of year | 2012-12-31 | $12,485,524 |
| Assets. Other investments not covered elsewhere at beginning of year | 2012-12-31 | $12,172,111 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2012-12-31 | $3,075,700 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2012-12-31 | $2,811,270 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2012-12-31 | $22,147,790 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2012-12-31 | $22,359,718 |
| Administrative expenses (other) incurred | 2012-12-31 | $37,754 |
| Value of net income/loss | 2012-12-31 | $5,740,496 |
| Value of net assets at end of year (total assets less liabilities) | 2012-12-31 | $169,093,105 |
| Value of net assets at beginning of year (total assets less liabilities) | 2012-12-31 | $156,171,200 |
| Interest earned on other investments | 2012-12-31 | $258,084 |
| Income. Interest from corporate debt instruments | 2012-12-31 | $2,630,611 |
| Value of interest in common/collective trusts at end of year | 2012-12-31 | $0 |
| Value of interest in common/collective trusts at beginning of year | 2012-12-31 | $0 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2012-12-31 | $19,931,103 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2012-12-31 | $24,407,105 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2012-12-31 | $24,407,105 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2012-12-31 | $5,608 |
| Asset. Corporate debt instrument preferred debt at end of year | 2012-12-31 | $123,514,426 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2012-12-31 | $110,443,526 |
| Asset. Corporate debt instrument debt (other) at end of year | 2012-12-31 | $32,234,142 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2012-12-31 | $28,696,906 |
| Aggregate proceeds on sale of assets | 2012-12-31 | $118,956,673 |
| Aggregate carrying amount (costs) on sale of assets | 2012-12-31 | $119,062,657 |
| 2011 : STATE STREET 1-3 YEAR U.S. CREDIT INDEX SECURITIES LENDING FUND 2011 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2011-12-31 | $851,917 |
| Total unrealized appreciation/depreciation of assets | 2011-12-31 | $851,917 |
| Total transfer of assets to this plan | 2011-12-31 | $41,505,210 |
| Total transfer of assets from this plan | 2011-12-31 | $115,324,770 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2011-12-31 | $22,359,718 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2011-12-31 | $30,192,871 |
| Total income from all sources (including contributions) | 2011-12-31 | $3,382,763 |
| Total loss/gain on sale of assets | 2011-12-31 | $-1,514,271 |
| Total of all expenses incurred | 2011-12-31 | $48,851 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2011-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2011-12-31 | $0 |
| Value of total assets at end of year | 2011-12-31 | $178,530,918 |
| Value of total assets at beginning of year | 2011-12-31 | $256,849,719 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2011-12-31 | $48,851 |
| Total interest from all sources | 2011-12-31 | $4,045,117 |
| Total dividends received (eg from common stock, registered investment company shares) | 2011-12-31 | $0 |
| Administrative expenses professional fees incurred | 2011-12-31 | $5,468 |
| Assets. Other investments not covered elsewhere at end of year | 2011-12-31 | $12,172,111 |
| Assets. Other investments not covered elsewhere at beginning of year | 2011-12-31 | $20,439,103 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2011-12-31 | $2,811,270 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2011-12-31 | $5,873,462 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2011-12-31 | $22,359,718 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2011-12-31 | $30,192,871 |
| Administrative expenses (other) incurred | 2011-12-31 | $43,383 |
| Value of net income/loss | 2011-12-31 | $3,333,912 |
| Value of net assets at end of year (total assets less liabilities) | 2011-12-31 | $156,171,200 |
| Value of net assets at beginning of year (total assets less liabilities) | 2011-12-31 | $226,656,848 |
| Interest earned on other investments | 2011-12-31 | $361,041 |
| Income. Interest from corporate debt instruments | 2011-12-31 | $3,677,655 |
| Value of interest in common/collective trusts at end of year | 2011-12-31 | $0 |
| Value of interest in common/collective trusts at beginning of year | 2011-12-31 | $0 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2011-12-31 | $24,407,105 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2011-12-31 | $29,143,776 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2011-12-31 | $29,143,776 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2011-12-31 | $6,421 |
| Asset. Corporate debt instrument preferred debt at end of year | 2011-12-31 | $110,443,526 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2011-12-31 | $158,655,741 |
| Asset. Corporate debt instrument debt (other) at end of year | 2011-12-31 | $28,696,906 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2011-12-31 | $42,737,637 |
| Aggregate proceeds on sale of assets | 2011-12-31 | $126,636,224 |
| Aggregate carrying amount (costs) on sale of assets | 2011-12-31 | $128,150,495 |
| 2010 : STATE STREET 1-3 YEAR U.S. CREDIT INDEX SECURITIES LENDING FUND 2010 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2010-12-31 | $5,284,774 |
| Total unrealized appreciation/depreciation of assets | 2010-12-31 | $5,284,774 |
| Total transfer of assets to this plan | 2010-12-31 | $81,916,238 |
| Total transfer of assets from this plan | 2010-12-31 | $279,619,752 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2010-12-31 | $30,192,871 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2010-12-31 | $72,151,549 |
| Total income from all sources (including contributions) | 2010-12-31 | $15,458,457 |
| Total loss/gain on sale of assets | 2010-12-31 | $-216,349 |
| Total of all expenses incurred | 2010-12-31 | $92,220 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2010-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2010-12-31 | $0 |
| Value of total assets at end of year | 2010-12-31 | $256,849,719 |
| Value of total assets at beginning of year | 2010-12-31 | $481,145,674 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2010-12-31 | $92,220 |
| Total interest from all sources | 2010-12-31 | $10,390,032 |
| Total dividends received (eg from common stock, registered investment company shares) | 2010-12-31 | $0 |
| Administrative expenses professional fees incurred | 2010-12-31 | $9,816 |
| Assets. Other investments not covered elsewhere at end of year | 2010-12-31 | $20,439,103 |
| Assets. Other investments not covered elsewhere at beginning of year | 2010-12-31 | $26,262,401 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2010-12-31 | $5,873,462 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2010-12-31 | $16,415,228 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2010-12-31 | $30,192,871 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2010-12-31 | $72,151,549 |
| Administrative expenses (other) incurred | 2010-12-31 | $82,404 |
| Value of net income/loss | 2010-12-31 | $15,366,237 |
| Value of net assets at end of year (total assets less liabilities) | 2010-12-31 | $226,656,848 |
| Value of net assets at beginning of year (total assets less liabilities) | 2010-12-31 | $408,994,125 |
| Interest earned on other investments | 2010-12-31 | $725,201 |
| Income. Interest from US Government securities | 2010-12-31 | $11,629 |
| Income. Interest from corporate debt instruments | 2010-12-31 | $9,633,531 |
| Value of interest in common/collective trusts at end of year | 2010-12-31 | $0 |
| Value of interest in common/collective trusts at beginning of year | 2010-12-31 | $0 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2010-12-31 | $29,143,776 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2010-12-31 | $68,118,577 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2010-12-31 | $68,118,577 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2010-12-31 | $19,671 |
| Asset value of US Government securities at beginning of year | 2010-12-31 | $0 |
| Asset. Corporate debt instrument preferred debt at end of year | 2010-12-31 | $158,655,741 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2010-12-31 | $280,747,122 |
| Asset. Corporate debt instrument debt (other) at end of year | 2010-12-31 | $42,737,637 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2010-12-31 | $89,602,346 |
| Aggregate proceeds on sale of assets | 2010-12-31 | $203,585,393 |
| Aggregate carrying amount (costs) on sale of assets | 2010-12-31 | $203,801,742 |
