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 U.S. BOND INDEX NON-LENDING SERIES FUND CLASS C
401k plan membership statisitcs for STATE STREET U.S. BOND INDEX NON-LENDING SERIES FUND CLASS C
| Measure | Date | Value |
|---|
| 2022 : STATE STREET U.S. BOND INDEX NON-LENDING SERIES FUND CLASS C 2022 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2022-12-31 | $-68,575,171 |
| Total unrealized appreciation/depreciation of assets | 2022-12-31 | $-68,575,171 |
| Total transfer of assets to this plan | 2022-12-31 | $180,494,798 |
| Total transfer of assets from this plan | 2022-12-31 | $348,894,496 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-12-31 | $33,632,515 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-12-31 | $45,739,882 |
| Total income from all sources (including contributions) | 2022-12-31 | $-91,889,901 |
| Total loss/gain on sale of assets | 2022-12-31 | $-33,574,741 |
| Total of all expenses incurred | 2022-12-31 | $73,506 |
| 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 | $461,751,862 |
| Value of total assets at beginning of year | 2022-12-31 | $734,222,334 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2022-12-31 | $73,506 |
| Total interest from all sources | 2022-12-31 | $10,260,011 |
| Total dividends received (eg from common stock, registered investment company shares) | 2022-12-31 | $0 |
| Administrative expenses professional fees incurred | 2022-12-31 | $383 |
| Assets. Other investments not covered elsewhere at end of year | 2022-12-31 | $10,298,449 |
| Assets. Other investments not covered elsewhere at beginning of year | 2022-12-31 | $14,956,768 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2022-12-31 | $12,102,885 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2022-12-31 | $18,492,670 |
| Assets. Loans (other than to participants) at end of year | 2022-12-31 | $7,715,624 |
| Assets. Loans (other than to participants) at beginning of year | 2022-12-31 | $13,445,774 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2022-12-31 | $33,632,515 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2022-12-31 | $45,739,882 |
| Administrative expenses (other) incurred | 2022-12-31 | $53,743 |
| Total non interest bearing cash at end of year | 2022-12-31 | $625 |
| Total non interest bearing cash at beginning of year | 2022-12-31 | $0 |
| Value of net income/loss | 2022-12-31 | $-91,963,407 |
| Value of net assets at end of year (total assets less liabilities) | 2022-12-31 | $428,119,347 |
| Value of net assets at beginning of year (total assets less liabilities) | 2022-12-31 | $688,482,452 |
| Investment advisory and management fees | 2022-12-31 | $19,380 |
| Income. Interest from loans (other than to participants) | 2022-12-31 | $-318,985 |
| Interest earned on other investments | 2022-12-31 | $341,935 |
| Income. Interest from US Government securities | 2022-12-31 | $6,293,532 |
| Income. Interest from corporate debt instruments | 2022-12-31 | $3,784,340 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2022-12-31 | $27,472,994 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2022-12-31 | $31,325,913 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2022-12-31 | $31,325,913 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2022-12-31 | $159,189 |
| Asset value of US Government securities at end of year | 2022-12-31 | $296,002,473 |
| Asset value of US Government securities at beginning of year | 2022-12-31 | $468,206,553 |
| 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 | $99,010,719 |
| Asset. Corporate debt instrument debt (other) at end of year | 2022-12-31 | $108,158,812 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2022-12-31 | $88,783,937 |
| Aggregate proceeds on sale of assets | 2022-12-31 | $288,599,519 |
| Aggregate carrying amount (costs) on sale of assets | 2022-12-31 | $322,174,260 |
| 2021 : STATE STREET U.S. BOND INDEX NON-LENDING SERIES FUND CLASS C 2021 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2021-12-31 | $-21,260,299 |
| Total unrealized appreciation/depreciation of assets | 2021-12-31 | $-21,260,299 |
| Total transfer of assets to this plan | 2021-12-31 | $234,143,123 |
| Total transfer of assets from this plan | 2021-12-31 | $383,942,001 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2021-12-31 | $45,739,882 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2021-12-31 | $61,749,588 |
| Total income from all sources (including contributions) | 2021-12-31 | $-13,703,371 |
| Total loss/gain on sale of assets | 2021-12-31 | $-5,420,443 |
| Total of all expenses incurred | 2021-12-31 | $119,528 |
| 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 | $734,222,334 |
| Value of total assets at beginning of year | 2021-12-31 | $913,853,817 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2021-12-31 | $119,528 |
| Total interest from all sources | 2021-12-31 | $12,977,371 |
| Total dividends received (eg from common stock, registered investment company shares) | 2021-12-31 | $0 |
| Administrative expenses professional fees incurred | 2021-12-31 | $1,368 |
| Assets. Other investments not covered elsewhere at end of year | 2021-12-31 | $14,956,768 |
| Assets. Other investments not covered elsewhere at beginning of year | 2021-12-31 | $19,843,368 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2021-12-31 | $18,492,670 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2021-12-31 | $31,162,844 |
| Assets. Loans (other than to participants) at end of year | 2021-12-31 | $13,445,774 |
| Assets. Loans (other than to participants) at beginning of year | 2021-12-31 | $18,196,791 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2021-12-31 | $45,739,882 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2021-12-31 | $61,749,588 |
| Administrative expenses (other) incurred | 2021-12-31 | $-176,676 |
| 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 | $3,986 |
| Value of net income/loss | 2021-12-31 | $-13,822,899 |
| Value of net assets at end of year (total assets less liabilities) | 2021-12-31 | $688,482,452 |
| Value of net assets at beginning of year (total assets less liabilities) | 2021-12-31 | $852,104,229 |
| Investment advisory and management fees | 2021-12-31 | $294,836 |
| Interest earned on other investments | 2021-12-31 | $416,886 |
| Income. Interest from US Government securities | 2021-12-31 | $7,472,753 |
| Income. Interest from corporate debt instruments | 2021-12-31 | $5,036,834 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2021-12-31 | $31,325,913 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2021-12-31 | $43,822,396 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2021-12-31 | $43,822,396 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2021-12-31 | $50,898 |
| Asset value of US Government securities at end of year | 2021-12-31 | $468,206,553 |
| Asset value of US Government securities at beginning of year | 2021-12-31 | $552,798,153 |
| Asset. Corporate debt instrument preferred debt at end of year | 2021-12-31 | $99,010,719 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2021-12-31 | $129,296,698 |
| Asset. Corporate debt instrument debt (other) at end of year | 2021-12-31 | $88,783,937 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2021-12-31 | $118,729,581 |
| Aggregate proceeds on sale of assets | 2021-12-31 | $770,479,261 |
| Aggregate carrying amount (costs) on sale of assets | 2021-12-31 | $775,899,704 |
| 2020 : STATE STREET U.S. BOND INDEX NON-LENDING SERIES FUND CLASS C 2020 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2020-12-31 | $71,199,215 |
| Total unrealized appreciation/depreciation of assets | 2020-12-31 | $71,199,215 |
| Total transfer of assets to this plan | 2020-12-31 | $719,032,186 |
| Total transfer of assets from this plan | 2020-12-31 | $1,489,396,559 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2020-12-31 | $61,749,588 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2020-12-31 | $82,982,780 |
| Total income from all sources (including contributions) | 2020-12-31 | $95,479,635 |
| Total loss/gain on sale of assets | 2020-12-31 | $-2,237,437 |
| Total of all expenses incurred | 2020-12-31 | $604,363 |
| 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 | $913,853,817 |
| Value of total assets at beginning of year | 2020-12-31 | $1,610,576,110 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2020-12-31 | $604,363 |
| Total interest from all sources | 2020-12-31 | $26,517,857 |
| Total dividends received (eg from common stock, registered investment company shares) | 2020-12-31 | $0 |
| Administrative expenses professional fees incurred | 2020-12-31 | $2,709 |
| Assets. Other investments not covered elsewhere at end of year | 2020-12-31 | $19,843,368 |
| Assets. Other investments not covered elsewhere at beginning of year | 2020-12-31 | $33,226,787 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2020-12-31 | $31,162,844 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2020-12-31 | $54,374,776 |
| Assets. Loans (other than to participants) at end of year | 2020-12-31 | $18,196,791 |
| Assets. Loans (other than to participants) at beginning of year | 2020-12-31 | $30,917,236 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2020-12-31 | $61,749,588 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2020-12-31 | $82,982,780 |
| Administrative expenses (other) incurred | 2020-12-31 | $136,759 |
| Total non interest bearing cash at end of year | 2020-12-31 | $3,986 |
| Total non interest bearing cash at beginning of year | 2020-12-31 | $3,148 |
| Value of net income/loss | 2020-12-31 | $94,875,272 |
| Value of net assets at end of year (total assets less liabilities) | 2020-12-31 | $852,104,229 |
| Value of net assets at beginning of year (total assets less liabilities) | 2020-12-31 | $1,527,593,330 |
| Investment advisory and management fees | 2020-12-31 | $464,895 |
| Income. Interest from loans (other than to participants) | 2020-12-31 | $518,126 |
| Interest earned on other investments | 2020-12-31 | $875,533 |
| Income. Interest from US Government securities | 2020-12-31 | $17,492,743 |
| Income. Interest from corporate debt instruments | 2020-12-31 | $7,377,844 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2020-12-31 | $43,822,396 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2020-12-31 | $40,951,307 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2020-12-31 | $40,951,307 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2020-12-31 | $253,611 |
| Asset value of US Government securities at end of year | 2020-12-31 | $552,798,153 |
| Asset value of US Government securities at beginning of year | 2020-12-31 | $1,027,995,258 |
| Asset. Corporate debt instrument preferred debt at end of year | 2020-12-31 | $129,296,698 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2020-12-31 | $220,740,774 |
| Asset. Corporate debt instrument debt (other) at end of year | 2020-12-31 | $118,729,581 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2020-12-31 | $202,366,824 |
| Aggregate proceeds on sale of assets | 2020-12-31 | $1,173,397,206 |
| Aggregate carrying amount (costs) on sale of assets | 2020-12-31 | $1,175,634,643 |
| 2019 : STATE STREET U.S. BOND INDEX NON-LENDING SERIES FUND CLASS C 2019 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2019-12-31 | $96,840,186 |
| Unrealized appreciation/depreciation of other (non real estate) assets | 2019-12-31 | $96,840,186 |
| Total unrealized appreciation/depreciation of assets | 2019-12-31 | $96,840,186 |
| Total unrealized appreciation/depreciation of assets | 2019-12-31 | $96,840,186 |
| Total transfer of assets to this plan | 2019-12-31 | $573,975,050 |
| Total transfer of assets to this plan | 2019-12-31 | $573,975,050 |
| Total transfer of assets from this plan | 2019-12-31 | $800,385,767 |
| Total transfer of assets from this plan | 2019-12-31 | $800,385,767 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $82,982,780 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $82,982,780 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $89,498,261 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $89,498,261 |
| Total income from all sources (including contributions) | 2019-12-31 | $147,291,839 |
| Total income from all sources (including contributions) | 2019-12-31 | $147,291,839 |
| Total loss/gain on sale of assets | 2019-12-31 | $2,764,315 |
| Total loss/gain on sale of assets | 2019-12-31 | $2,764,315 |
| Total of all expenses incurred | 2019-12-31 | $883,028 |
| Total of all expenses incurred | 2019-12-31 | $883,028 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2019-12-31 | $0 |
| 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 |
| 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 | $1,610,576,110 |
| Value of total assets at end of year | 2019-12-31 | $1,610,576,110 |
| Value of total assets at beginning of year | 2019-12-31 | $1,697,093,497 |
| Value of total assets at beginning of year | 2019-12-31 | $1,697,093,497 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2019-12-31 | $883,028 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2019-12-31 | $883,028 |
| Total interest from all sources | 2019-12-31 | $47,687,338 |
| Total interest from all sources | 2019-12-31 | $47,687,338 |
| Total dividends received (eg from common stock, registered investment company shares) | 2019-12-31 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2019-12-31 | $0 |
| Administrative expenses professional fees incurred | 2019-12-31 | $2,713 |
| Administrative expenses professional fees incurred | 2019-12-31 | $2,713 |
| Assets. Other investments not covered elsewhere at end of year | 2019-12-31 | $33,226,787 |
| Assets. Other investments not covered elsewhere at end of year | 2019-12-31 | $33,226,787 |
| Assets. Other investments not covered elsewhere at beginning of year | 2019-12-31 | $33,674,252 |
| Assets. Other investments not covered elsewhere at beginning of year | 2019-12-31 | $33,674,252 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2019-12-31 | $54,374,776 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2019-12-31 | $54,374,776 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2019-12-31 | $53,847,619 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2019-12-31 | $53,847,619 |
| Assets. Loans (other than to participants) at end of year | 2019-12-31 | $30,917,236 |
| Assets. Loans (other than to participants) at end of year | 2019-12-31 | $30,917,236 |
| Assets. Loans (other than to participants) at beginning of year | 2019-12-31 | $31,592,367 |
| Assets. Loans (other than to participants) at beginning of year | 2019-12-31 | $31,592,367 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2019-12-31 | $82,982,780 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2019-12-31 | $82,982,780 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2019-12-31 | $89,498,261 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2019-12-31 | $89,498,261 |
| Administrative expenses (other) incurred | 2019-12-31 | $201,063 |
| Administrative expenses (other) incurred | 2019-12-31 | $201,063 |
| Total non interest bearing cash at end of year | 2019-12-31 | $3,148 |
| Total non interest bearing cash at end of year | 2019-12-31 | $3,148 |
| Total non interest bearing cash at beginning of year | 2019-12-31 | $4,035 |
| Total non interest bearing cash at beginning of year | 2019-12-31 | $4,035 |
| Value of net income/loss | 2019-12-31 | $146,408,811 |
| Value of net income/loss | 2019-12-31 | $146,408,811 |
| Value of net assets at end of year (total assets less liabilities) | 2019-12-31 | $1,527,593,330 |
| Value of net assets at end of year (total assets less liabilities) | 2019-12-31 | $1,527,593,330 |
| Value of net assets at beginning of year (total assets less liabilities) | 2019-12-31 | $1,607,595,236 |
| Value of net assets at beginning of year (total assets less liabilities) | 2019-12-31 | $1,607,595,236 |
| Investment advisory and management fees | 2019-12-31 | $679,252 |
| Investment advisory and management fees | 2019-12-31 | $679,252 |
| Income. Interest from loans (other than to participants) | 2019-12-31 | $1,013,018 |
| Income. Interest from loans (other than to participants) | 2019-12-31 | $1,013,018 |
| Interest earned on other investments | 2019-12-31 | $1,349,427 |
| Interest earned on other investments | 2019-12-31 | $1,349,427 |
| Income. Interest from US Government securities | 2019-12-31 | $27,361,885 |
| Income. Interest from US Government securities | 2019-12-31 | $27,361,885 |
| Income. Interest from corporate debt instruments | 2019-12-31 | $16,754,690 |
| Income. Interest from corporate debt instruments | 2019-12-31 | $16,754,690 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2019-12-31 | $40,951,307 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2019-12-31 | $40,951,307 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2019-12-31 | $51,984,944 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2019-12-31 | $51,984,944 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2019-12-31 | $51,984,944 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2019-12-31 | $51,984,944 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2019-12-31 | $1,208,318 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2019-12-31 | $1,208,318 |
| Asset value of US Government securities at end of year | 2019-12-31 | $1,027,995,258 |
| Asset value of US Government securities at end of year | 2019-12-31 | $1,027,995,258 |
| Asset value of US Government securities at beginning of year | 2019-12-31 | $1,074,149,364 |
| Asset value of US Government securities at beginning of year | 2019-12-31 | $1,074,149,364 |
| Asset. Corporate debt instrument preferred debt at end of year | 2019-12-31 | $220,740,774 |
| Asset. Corporate debt instrument preferred debt at end of year | 2019-12-31 | $220,740,774 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2019-12-31 | $250,166,612 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2019-12-31 | $250,166,612 |
| Asset. Corporate debt instrument debt (other) at end of year | 2019-12-31 | $202,366,824 |
| Asset. Corporate debt instrument debt (other) at end of year | 2019-12-31 | $202,366,824 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2019-12-31 | $201,674,304 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2019-12-31 | $201,674,304 |
| Aggregate proceeds on sale of assets | 2019-12-31 | $1,179,925,833 |
| Aggregate proceeds on sale of assets | 2019-12-31 | $1,179,925,833 |
| Aggregate carrying amount (costs) on sale of assets | 2019-12-31 | $1,177,161,518 |
| Aggregate carrying amount (costs) on sale of assets | 2019-12-31 | $1,177,161,518 |
| 2018 : STATE STREET U.S. BOND INDEX NON-LENDING SERIES FUND CLASS C 2018 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2018-12-31 | $-46,456,902 |
| Total unrealized appreciation/depreciation of assets | 2018-12-31 | $-46,456,902 |
| Total transfer of assets to this plan | 2018-12-31 | $587,213,014 |
| Total transfer of assets from this plan | 2018-12-31 | $902,181,751 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2018-12-31 | $89,498,261 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2018-12-31 | $131,266,015 |
| Total income from all sources (including contributions) | 2018-12-31 | $-1,847,857 |
| Total loss/gain on sale of assets | 2018-12-31 | $-7,082,313 |
| Total of all expenses incurred | 2018-12-31 | $947,805 |
| 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 | $1,697,093,497 |
| Value of total assets at beginning of year | 2018-12-31 | $2,056,625,650 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2018-12-31 | $947,805 |
| Total interest from all sources | 2018-12-31 | $51,691,358 |
| Total dividends received (eg from common stock, registered investment company shares) | 2018-12-31 | $0 |
| Administrative expenses professional fees incurred | 2018-12-31 | $4,281 |
| Assets. Other investments not covered elsewhere at end of year | 2018-12-31 | $33,674,252 |
| Assets. Other investments not covered elsewhere at beginning of year | 2018-12-31 | $40,393,277 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2018-12-31 | $53,847,619 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2018-12-31 | $100,715,769 |
| Assets. Loans (other than to participants) at end of year | 2018-12-31 | $31,592,367 |
| Assets. Loans (other than to participants) at beginning of year | 2018-12-31 | $33,713,896 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2018-12-31 | $89,498,261 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2018-12-31 | $131,266,015 |
| Administrative expenses (other) incurred | 2018-12-31 | $214,444 |
| Total non interest bearing cash at end of year | 2018-12-31 | $4,035 |
| Total non interest bearing cash at beginning of year | 2018-12-31 | $139,842 |
| Value of net income/loss | 2018-12-31 | $-2,795,662 |
| Value of net assets at end of year (total assets less liabilities) | 2018-12-31 | $1,607,595,236 |
| Value of net assets at beginning of year (total assets less liabilities) | 2018-12-31 | $1,925,359,635 |
| Investment advisory and management fees | 2018-12-31 | $729,080 |
| Income. Interest from loans (other than to participants) | 2018-12-31 | $1,167,570 |
| Interest earned on other investments | 2018-12-31 | $1,357,000 |
| Income. Interest from US Government securities | 2018-12-31 | $29,586,928 |
| Income. Interest from corporate debt instruments | 2018-12-31 | $18,602,652 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2018-12-31 | $51,984,944 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2018-12-31 | $52,631,532 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2018-12-31 | $52,631,532 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2018-12-31 | $977,208 |
| Asset value of US Government securities at end of year | 2018-12-31 | $1,074,149,364 |
| Asset value of US Government securities at beginning of year | 2018-12-31 | $1,284,500,628 |
| Asset. Corporate debt instrument preferred debt at end of year | 2018-12-31 | $250,166,612 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2018-12-31 | $304,064,612 |
| Asset. Corporate debt instrument debt (other) at end of year | 2018-12-31 | $201,674,304 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2018-12-31 | $240,466,094 |
| Aggregate proceeds on sale of assets | 2018-12-31 | $1,144,914,821 |
| Aggregate carrying amount (costs) on sale of assets | 2018-12-31 | $1,151,997,134 |
| 2017 : STATE STREET U.S. BOND INDEX NON-LENDING SERIES FUND CLASS C 2017 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2017-12-31 | $12,587,431 |
| Total unrealized appreciation/depreciation of assets | 2017-12-31 | $12,587,431 |
| Total transfer of assets to this plan | 2017-12-31 | $717,139,620 |
| Total transfer of assets from this plan | 2017-12-31 | $623,019,213 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2017-12-31 | $131,266,015 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2017-12-31 | $65,058,164 |
| Total income from all sources (including contributions) | 2017-12-31 | $63,642,795 |
| Total loss/gain on sale of assets | 2017-12-31 | $3,010,940 |
| Total of all expenses incurred | 2017-12-31 | $964,580 |
| 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 | $2,056,625,650 |
| Value of total assets at beginning of year | 2017-12-31 | $1,833,619,177 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2017-12-31 | $964,580 |
| Total interest from all sources | 2017-12-31 | $48,044,424 |
| Total dividends received (eg from common stock, registered investment company shares) | 2017-12-31 | $0 |
| Administrative expenses professional fees incurred | 2017-12-31 | $4,698 |
| Assets. Other investments not covered elsewhere at end of year | 2017-12-31 | $40,393,277 |
| Assets. Other investments not covered elsewhere at beginning of year | 2017-12-31 | $42,839,780 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2017-12-31 | $100,715,769 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2017-12-31 | $58,903,991 |
| Assets. Loans (other than to participants) at end of year | 2017-12-31 | $33,713,896 |
| Assets. Loans (other than to participants) at beginning of year | 2017-12-31 | $28,188,480 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2017-12-31 | $131,266,015 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2017-12-31 | $65,058,164 |
| Administrative expenses (other) incurred | 2017-12-31 | $217,898 |
| Total non interest bearing cash at end of year | 2017-12-31 | $139,842 |
| Total non interest bearing cash at beginning of year | 2017-12-31 | $15,926 |
| Value of net income/loss | 2017-12-31 | $62,678,215 |
| Value of net assets at end of year (total assets less liabilities) | 2017-12-31 | $1,925,359,635 |
| Value of net assets at beginning of year (total assets less liabilities) | 2017-12-31 | $1,768,561,013 |
| Investment advisory and management fees | 2017-12-31 | $741,984 |
| Income. Interest from loans (other than to participants) | 2017-12-31 | $1,051,544 |
| Interest earned on other investments | 2017-12-31 | $1,532,868 |
| Income. Interest from US Government securities | 2017-12-31 | $26,660,032 |
| Income. Interest from corporate debt instruments | 2017-12-31 | $18,202,638 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2017-12-31 | $52,631,532 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2017-12-31 | $37,632,298 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2017-12-31 | $37,632,298 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2017-12-31 | $597,342 |
| Asset value of US Government securities at end of year | 2017-12-31 | $1,284,500,628 |
| Asset value of US Government securities at beginning of year | 2017-12-31 | $1,160,141,110 |
| Asset. Corporate debt instrument preferred debt at end of year | 2017-12-31 | $304,064,612 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2017-12-31 | $286,379,005 |
| Asset. Corporate debt instrument debt (other) at end of year | 2017-12-31 | $240,466,094 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2017-12-31 | $219,518,587 |
| Aggregate proceeds on sale of assets | 2017-12-31 | $1,619,185,364 |
| Aggregate carrying amount (costs) on sale of assets | 2017-12-31 | $1,616,174,424 |
| 2016 : STATE STREET U.S. BOND INDEX NON-LENDING SERIES FUND CLASS C 2016 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2016-12-31 | $-865,207 |
| Total unrealized appreciation/depreciation of assets | 2016-12-31 | $-865,207 |
| Total transfer of assets to this plan | 2016-12-31 | $1,203,180,834 |
| Total transfer of assets from this plan | 2016-12-31 | $2,028,230,960 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2016-12-31 | $65,058,164 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2016-12-31 | $136,930,806 |
| Total income from all sources (including contributions) | 2016-12-31 | $60,194,243 |
| Total loss/gain on sale of assets | 2016-12-31 | $-7,277,580 |
| Total of all expenses incurred | 2016-12-31 | $1,431,719 |
| 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 | $1,833,619,177 |
| Value of total assets at beginning of year | 2016-12-31 | $2,671,779,421 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2016-12-31 | $1,431,719 |
| Total interest from all sources | 2016-12-31 | $68,337,030 |
| Total dividends received (eg from common stock, registered investment company shares) | 2016-12-31 | $0 |
| Administrative expenses professional fees incurred | 2016-12-31 | $7,988 |
| Assets. Other investments not covered elsewhere at end of year | 2016-12-31 | $42,839,780 |
| Assets. Other investments not covered elsewhere at beginning of year | 2016-12-31 | $67,439,952 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2016-12-31 | $58,903,991 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2016-12-31 | $47,097,496 |
| Assets. Loans (other than to participants) at end of year | 2016-12-31 | $28,188,480 |
| Assets. Loans (other than to participants) at beginning of year | 2016-12-31 | $43,989,734 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2016-12-31 | $65,058,164 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2016-12-31 | $136,930,806 |
| Administrative expenses (other) incurred | 2016-12-31 | $322,407 |
| Total non interest bearing cash at end of year | 2016-12-31 | $15,926 |
| Total non interest bearing cash at beginning of year | 2016-12-31 | $0 |
| Value of net income/loss | 2016-12-31 | $58,762,524 |
| Value of net assets at end of year (total assets less liabilities) | 2016-12-31 | $1,768,561,013 |
| Value of net assets at beginning of year (total assets less liabilities) | 2016-12-31 | $2,534,848,615 |
| Investment advisory and management fees | 2016-12-31 | $1,101,324 |
| Income. Interest from loans (other than to participants) | 2016-12-31 | $-5,577,731 |
| Interest earned on other investments | 2016-12-31 | $2,824,302 |
| Income. Interest from US Government securities | 2016-12-31 | $43,885,641 |
| Income. Interest from corporate debt instruments | 2016-12-31 | $26,763,468 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2016-12-31 | $37,632,298 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2016-12-31 | $106,302,274 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2016-12-31 | $106,302,274 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2016-12-31 | $441,350 |
| Asset value of US Government securities at end of year | 2016-12-31 | $1,160,141,110 |
| Asset value of US Government securities at beginning of year | 2016-12-31 | $1,718,911,296 |
| Asset. Corporate debt instrument preferred debt at end of year | 2016-12-31 | $286,379,005 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2016-12-31 | $393,915,589 |
| Asset. Corporate debt instrument debt (other) at end of year | 2016-12-31 | $219,518,587 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2016-12-31 | $294,123,080 |
| Aggregate proceeds on sale of assets | 2016-12-31 | $1,596,216,595 |
| Aggregate carrying amount (costs) on sale of assets | 2016-12-31 | $1,603,494,175 |
| 2015 : STATE STREET U.S. BOND INDEX NON-LENDING SERIES FUND CLASS C 2015 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2015-12-31 | $-38,531,364 |
| Total unrealized appreciation/depreciation of assets | 2015-12-31 | $-38,531,364 |
| Total transfer of assets to this plan | 2015-12-31 | $995,507,369 |
| Total transfer of assets from this plan | 2015-12-31 | $853,420,577 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2015-12-31 | $136,930,806 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2015-12-31 | $165,652,729 |
| Total income from all sources (including contributions) | 2015-12-31 | $12,723,529 |
| Total loss/gain on sale of assets | 2015-12-31 | $-12,612,791 |
| Total of all expenses incurred | 2015-12-31 | $1,306,812 |
| 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 | $2,671,779,421 |
| Value of total assets at beginning of year | 2015-12-31 | $2,546,997,835 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2015-12-31 | $1,306,812 |
| Total interest from all sources | 2015-12-31 | $63,867,684 |
| Total dividends received (eg from common stock, registered investment company shares) | 2015-12-31 | $0 |
| Administrative expenses professional fees incurred | 2015-12-31 | $7,940 |
| Assets. Other investments not covered elsewhere at end of year | 2015-12-31 | $67,439,952 |
| Assets. Other investments not covered elsewhere at beginning of year | 2015-12-31 | $69,566,454 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2015-12-31 | $47,097,496 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2015-12-31 | $41,408,611 |
| Assets. Loans (other than to participants) at end of year | 2015-12-31 | $43,989,734 |
| Assets. Loans (other than to participants) at beginning of year | 2015-12-31 | $47,091,238 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2015-12-31 | $136,930,806 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2015-12-31 | $165,652,729 |
| Administrative expenses (other) incurred | 2015-12-31 | $280,383 |
| Total non interest bearing cash at end of year | 2015-12-31 | $0 |
| Total non interest bearing cash at beginning of year | 2015-12-31 | $0 |
| Value of net income/loss | 2015-12-31 | $11,416,717 |
| Value of net assets at end of year (total assets less liabilities) | 2015-12-31 | $2,534,848,615 |
| Value of net assets at beginning of year (total assets less liabilities) | 2015-12-31 | $2,381,345,106 |
| Investment advisory and management fees | 2015-12-31 | $1,018,489 |
| Income. Interest from loans (other than to participants) | 2015-12-31 | $1,757,277 |
| Interest earned on other investments | 2015-12-31 | $-3,370,097 |
| Income. Interest from US Government securities | 2015-12-31 | $40,798,184 |
| Income. Interest from corporate debt instruments | 2015-12-31 | $24,470,236 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2015-12-31 | $106,302,274 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2015-12-31 | $139,652,771 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2015-12-31 | $139,652,771 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2015-12-31 | $212,084 |
| Asset value of US Government securities at end of year | 2015-12-31 | $1,718,911,296 |
| Asset value of US Government securities at beginning of year | 2015-12-31 | $1,612,752,089 |
| Asset. Corporate debt instrument preferred debt at end of year | 2015-12-31 | $393,915,589 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2015-12-31 | $400,041,040 |
| Asset. Corporate debt instrument debt (other) at end of year | 2015-12-31 | $294,123,080 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2015-12-31 | $236,485,632 |
| Aggregate proceeds on sale of assets | 2015-12-31 | $1,788,229,898 |
| Aggregate carrying amount (costs) on sale of assets | 2015-12-31 | $1,800,842,689 |
| 2014 : STATE STREET U.S. BOND INDEX NON-LENDING SERIES FUND CLASS C 2014 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2014-12-31 | $65,057,760 |
| Total unrealized appreciation/depreciation of assets | 2014-12-31 | $65,057,760 |
| Total transfer of assets to this plan | 2014-12-31 | $977,866,886 |
| Total transfer of assets from this plan | 2014-12-31 | $613,945,864 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2014-12-31 | $165,652,729 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2014-12-31 | $102,515,064 |
| Total income from all sources (including contributions) | 2014-12-31 | $121,148,129 |
| Total loss/gain on sale of assets | 2014-12-31 | $2,579,128 |
| Total of all expenses incurred | 2014-12-31 | $1,089,512 |
| 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 | $2,546,997,835 |
| Value of total assets at beginning of year | 2014-12-31 | $1,999,880,531 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2014-12-31 | $1,089,512 |
| Total interest from all sources | 2014-12-31 | $53,511,241 |
| Total dividends received (eg from common stock, registered investment company shares) | 2014-12-31 | $0 |
| Administrative expenses professional fees incurred | 2014-12-31 | $7,487 |
| Assets. Other investments not covered elsewhere at end of year | 2014-12-31 | $69,566,454 |
| Assets. Other investments not covered elsewhere at beginning of year | 2014-12-31 | $53,221,867 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2014-12-31 | $41,408,611 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2014-12-31 | $30,582,885 |
| Assets. Loans (other than to participants) at end of year | 2014-12-31 | $47,091,238 |
| Assets. Loans (other than to participants) at beginning of year | 2014-12-31 | $30,224,411 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2014-12-31 | $165,652,729 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2014-12-31 | $102,515,064 |
| Administrative expenses (other) incurred | 2014-12-31 | $236,737 |
| Total non interest bearing cash at end of year | 2014-12-31 | $0 |
| Total non interest bearing cash at beginning of year | 2014-12-31 | $1,366 |
| Value of net income/loss | 2014-12-31 | $120,058,617 |
| Value of net assets at end of year (total assets less liabilities) | 2014-12-31 | $2,381,345,106 |
| Value of net assets at beginning of year (total assets less liabilities) | 2014-12-31 | $1,897,365,467 |
| Investment advisory and management fees | 2014-12-31 | $845,288 |
| Income. Interest from loans (other than to participants) | 2014-12-31 | $1,665,432 |
| Interest earned on other investments | 2014-12-31 | $-1,420,261 |
| Income. Interest from US Government securities | 2014-12-31 | $33,446,723 |
| Income. Interest from corporate debt instruments | 2014-12-31 | $19,611,686 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2014-12-31 | $139,652,771 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2014-12-31 | $104,919,405 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2014-12-31 | $104,919,405 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2014-12-31 | $207,661 |
| Asset value of US Government securities at end of year | 2014-12-31 | $1,612,752,089 |
| Asset value of US Government securities at beginning of year | 2014-12-31 | $1,307,770,343 |
| Asset. Corporate debt instrument preferred debt at end of year | 2014-12-31 | $400,041,040 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2014-12-31 | $308,447,262 |
| Asset. Corporate debt instrument debt (other) at end of year | 2014-12-31 | $236,485,632 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2014-12-31 | $164,712,992 |
| Aggregate proceeds on sale of assets | 2014-12-31 | $1,750,269,127 |
| Aggregate carrying amount (costs) on sale of assets | 2014-12-31 | $1,747,689,999 |
| 2013 : STATE STREET U.S. BOND INDEX NON-LENDING SERIES FUND CLASS C 2013 401k financial data |
|---|
| Unrealized appreciation/depreciation of real estate assets | 2013-12-31 | $0 |
| Unrealized appreciation/depreciation of other (non real estate) assets | 2013-12-31 | $-76,656,769 |
| Total unrealized appreciation/depreciation of assets | 2013-12-31 | $-76,656,769 |
| Total transfer of assets to this plan | 2013-12-31 | $574,942,520 |
| Total transfer of assets from this plan | 2013-12-31 | $984,851,324 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2013-12-31 | $102,515,064 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2013-12-31 | $201,936,151 |
| Total income from all sources (including contributions) | 2013-12-31 | $-45,488,052 |
| Total loss/gain on sale of assets | 2013-12-31 | $-20,162,728 |
| Total of all expenses incurred | 2013-12-31 | $1,240,542 |
| 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 | $1,999,880,531 |
| Value of total assets at beginning of year | 2013-12-31 | $2,555,939,016 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2013-12-31 | $1,240,542 |
| Total interest from all sources | 2013-12-31 | $51,331,445 |
| Total dividends received (eg from common stock, registered investment company shares) | 2013-12-31 | $0 |
| Administrative expenses professional fees incurred | 2013-12-31 | $8,433 |
| Assets. Other investments not covered elsewhere at end of year | 2013-12-31 | $53,221,867 |
| Assets. Other investments not covered elsewhere at beginning of year | 2013-12-31 | $60,414,266 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2013-12-31 | $30,582,885 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2013-12-31 | $32,852,384 |
| Assets. Loans (other than to participants) at end of year | 2013-12-31 | $30,224,411 |
| Assets. Loans (other than to participants) at beginning of year | 2013-12-31 | $40,730,738 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2013-12-31 | $102,515,064 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2013-12-31 | $201,936,151 |
| Administrative expenses (other) incurred | 2013-12-31 | $388,465 |
| Total non interest bearing cash at end of year | 2013-12-31 | $1,366 |
| Total non interest bearing cash at beginning of year | 2013-12-31 | $0 |
| Value of net income/loss | 2013-12-31 | $-46,728,594 |
| Value of net assets at end of year (total assets less liabilities) | 2013-12-31 | $1,897,365,467 |
| Value of net assets at beginning of year (total assets less liabilities) | 2013-12-31 | $2,354,002,865 |
| Investment advisory and management fees | 2013-12-31 | $843,644 |
| Interest on participant loans | 2013-12-31 | $0 |
| Income. Interest from loans (other than to participants) | 2013-12-31 | $-6,052,658 |
| Interest earned on other investments | 2013-12-31 | $2,422,155 |
| Income. Interest from US Government securities | 2013-12-31 | $35,433,148 |
| Income. Interest from corporate debt instruments | 2013-12-31 | $19,344,023 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2013-12-31 | $104,919,405 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2013-12-31 | $216,872,184 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2013-12-31 | $216,872,184 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2013-12-31 | $184,777 |
| Asset value of US Government securities at end of year | 2013-12-31 | $1,307,770,343 |
| Asset value of US Government securities at beginning of year | 2013-12-31 | $1,640,766,206 |
| Asset. Corporate debt instrument preferred debt at end of year | 2013-12-31 | $308,447,262 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2013-12-31 | $378,890,903 |
| Asset. Corporate debt instrument debt (other) at end of year | 2013-12-31 | $164,712,992 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2013-12-31 | $185,412,335 |
| Contract administrator fees | 2013-12-31 | $0 |
| Aggregate proceeds on sale of assets | 2013-12-31 | $1,474,920,092 |
| Aggregate carrying amount (costs) on sale of assets | 2013-12-31 | $1,495,082,820 |
| 2012 : STATE STREET U.S. BOND INDEX NON-LENDING SERIES FUND CLASS C 2012 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2012-12-31 | $39,149,614 |
| Total unrealized appreciation/depreciation of assets | 2012-12-31 | $39,149,614 |
| Total transfer of assets to this plan | 2012-12-31 | $1,076,208,262 |
| Total transfer of assets from this plan | 2012-12-31 | $673,491,674 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2012-12-31 | $201,936,151 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2012-12-31 | $97,741,245 |
| Total income from all sources (including contributions) | 2012-12-31 | $88,345,282 |
| Total loss/gain on sale of assets | 2012-12-31 | $-8,975,743 |
| Total of all expenses incurred | 2012-12-31 | $1,295,403 |
| 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 | $2,555,939,016 |
| Value of total assets at beginning of year | 2012-12-31 | $1,961,977,643 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2012-12-31 | $1,295,403 |
| Total interest from all sources | 2012-12-31 | $58,171,411 |
| Total dividends received (eg from common stock, registered investment company shares) | 2012-12-31 | $0 |
| Administrative expenses professional fees incurred | 2012-12-31 | $10,254 |
| Assets. Other investments not covered elsewhere at end of year | 2012-12-31 | $60,414,266 |
| Assets. Other investments not covered elsewhere at beginning of year | 2012-12-31 | $51,965,019 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2012-12-31 | $32,852,384 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2012-12-31 | $59,426,036 |
| Assets. Loans (other than to participants) at end of year | 2012-12-31 | $40,730,738 |
| Assets. Loans (other than to participants) at beginning of year | 2012-12-31 | $35,376,744 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2012-12-31 | $201,936,151 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2012-12-31 | $97,741,245 |
| Administrative expenses (other) incurred | 2012-12-31 | $421,547 |
| Total non interest bearing cash at end of year | 2012-12-31 | $0 |
| Total non interest bearing cash at beginning of year | 2012-12-31 | $4,889 |
| Value of net income/loss | 2012-12-31 | $87,049,879 |
| Value of net assets at end of year (total assets less liabilities) | 2012-12-31 | $2,354,002,865 |
| Value of net assets at beginning of year (total assets less liabilities) | 2012-12-31 | $1,864,236,398 |
| Investment advisory and management fees | 2012-12-31 | $863,602 |
| Income. Interest from loans (other than to participants) | 2012-12-31 | $-5,709,652 |
| Interest earned on other investments | 2012-12-31 | $2,428,951 |
| Income. Interest from US Government securities | 2012-12-31 | $40,602,923 |
| Income. Interest from corporate debt instruments | 2012-12-31 | $20,525,091 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2012-12-31 | $216,872,184 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2012-12-31 | $105,962,529 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2012-12-31 | $105,962,529 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2012-12-31 | $324,098 |
| Asset value of US Government securities at end of year | 2012-12-31 | $1,640,766,206 |
| Asset value of US Government securities at beginning of year | 2012-12-31 | $1,302,452,650 |
| Asset. Corporate debt instrument preferred debt at end of year | 2012-12-31 | $378,890,903 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2012-12-31 | $268,168,529 |
| Asset. Corporate debt instrument debt (other) at end of year | 2012-12-31 | $185,412,335 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2012-12-31 | $138,621,247 |
| Aggregate proceeds on sale of assets | 2012-12-31 | $1,516,929,868 |
| Aggregate carrying amount (costs) on sale of assets | 2012-12-31 | $1,525,905,611 |
| 2011 : STATE STREET U.S. BOND INDEX NON-LENDING SERIES FUND CLASS C 2011 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2011-12-31 | $69,525,823 |
| Total unrealized appreciation/depreciation of assets | 2011-12-31 | $69,525,823 |
| Total transfer of assets to this plan | 2011-12-31 | $956,556,393 |
| Total transfer of assets from this plan | 2011-12-31 | $527,985,754 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2011-12-31 | $97,741,245 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2011-12-31 | $69,647,304 |
| Total income from all sources (including contributions) | 2011-12-31 | $115,378,734 |
| Total loss/gain on sale of assets | 2011-12-31 | $-4,099,506 |
| Total of all expenses incurred | 2011-12-31 | $907,870 |
| 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 | $1,961,977,643 |
| Value of total assets at beginning of year | 2011-12-31 | $1,390,842,199 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2011-12-31 | $907,870 |
| Total interest from all sources | 2011-12-31 | $49,952,417 |
| Total dividends received (eg from common stock, registered investment company shares) | 2011-12-31 | $0 |
| Administrative expenses professional fees incurred | 2011-12-31 | $8,132 |
| Assets. Other investments not covered elsewhere at end of year | 2011-12-31 | $51,965,019 |
| Assets. Other investments not covered elsewhere at beginning of year | 2011-12-31 | $34,030,911 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2011-12-31 | $59,426,036 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2011-12-31 | $42,956,535 |
| Assets. Loans (other than to participants) at end of year | 2011-12-31 | $35,376,744 |
| Assets. Loans (other than to participants) at beginning of year | 2011-12-31 | $36,096,635 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2011-12-31 | $97,741,245 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2011-12-31 | $69,647,304 |
| Administrative expenses (other) incurred | 2011-12-31 | $294,450 |
| Total non interest bearing cash at end of year | 2011-12-31 | $4,889 |
| Total non interest bearing cash at beginning of year | 2011-12-31 | $2,435 |
| Value of net income/loss | 2011-12-31 | $114,470,864 |
| Value of net assets at end of year (total assets less liabilities) | 2011-12-31 | $1,864,236,398 |
| Value of net assets at beginning of year (total assets less liabilities) | 2011-12-31 | $1,321,194,895 |
| Investment advisory and management fees | 2011-12-31 | $605,288 |
| Income. Interest from loans (other than to participants) | 2011-12-31 | $-1,737,860 |
| Interest earned on other investments | 2011-12-31 | $1,890,093 |
| Income. Interest from US Government securities | 2011-12-31 | $33,986,132 |
| Income. Interest from corporate debt instruments | 2011-12-31 | $15,676,967 |
| 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 | $105,962,529 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2011-12-31 | $38,928,748 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2011-12-31 | $38,928,748 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2011-12-31 | $137,085 |
| Asset value of US Government securities at end of year | 2011-12-31 | $1,302,452,650 |
| Asset value of US Government securities at beginning of year | 2011-12-31 | $945,017,979 |
| Asset. Corporate debt instrument preferred debt at end of year | 2011-12-31 | $268,168,529 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2011-12-31 | $202,706,675 |
| Asset. Corporate debt instrument debt (other) at end of year | 2011-12-31 | $138,621,247 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2011-12-31 | $91,102,281 |
| Aggregate proceeds on sale of assets | 2011-12-31 | $940,629,561 |
| Aggregate carrying amount (costs) on sale of assets | 2011-12-31 | $944,729,067 |
| 2010 : STATE STREET U.S. BOND INDEX NON-LENDING SERIES FUND CLASS C 2010 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2010-12-31 | $31,295,441 |
| Total unrealized appreciation/depreciation of assets | 2010-12-31 | $31,295,441 |
| Total transfer of assets to this plan | 2010-12-31 | $585,956,367 |
| Total transfer of assets from this plan | 2010-12-31 | $461,521,201 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2010-12-31 | $69,647,304 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2010-12-31 | $89,307,660 |
| Total income from all sources (including contributions) | 2010-12-31 | $73,289,362 |
| Total loss/gain on sale of assets | 2010-12-31 | $328,890 |
| Total of all expenses incurred | 2010-12-31 | $748,392 |
| 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 | $1,390,842,199 |
| Value of total assets at beginning of year | 2010-12-31 | $1,213,526,419 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2010-12-31 | $748,392 |
| Total interest from all sources | 2010-12-31 | $41,665,031 |
| Total dividends received (eg from common stock, registered investment company shares) | 2010-12-31 | $0 |
| Administrative expenses professional fees incurred | 2010-12-31 | $11,081 |
| Assets. Other investments not covered elsewhere at end of year | 2010-12-31 | $34,030,911 |
| Assets. Other investments not covered elsewhere at beginning of year | 2010-12-31 | $21,002,280 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2010-12-31 | $42,956,535 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2010-12-31 | $19,641,269 |
| Assets. Loans (other than to participants) at end of year | 2010-12-31 | $36,096,635 |
| Assets. Loans (other than to participants) at beginning of year | 2010-12-31 | $37,807,267 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2010-12-31 | $69,647,304 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2010-12-31 | $89,307,660 |
| Administrative expenses (other) incurred | 2010-12-31 | $242,781 |
| Total non interest bearing cash at end of year | 2010-12-31 | $2,435 |
| Value of net income/loss | 2010-12-31 | $72,540,970 |
| Value of net assets at end of year (total assets less liabilities) | 2010-12-31 | $1,321,194,895 |
| Value of net assets at beginning of year (total assets less liabilities) | 2010-12-31 | $1,124,218,759 |
| Investment advisory and management fees | 2010-12-31 | $494,530 |
| Income. Interest from loans (other than to participants) | 2010-12-31 | $-1,888,439 |
| Interest earned on other investments | 2010-12-31 | $1,338,777 |
| Income. Interest from US Government securities | 2010-12-31 | $29,049,209 |
| Income. Interest from corporate debt instruments | 2010-12-31 | $13,023,438 |
| 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 | $38,928,748 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2010-12-31 | $77,781,668 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2010-12-31 | $77,781,668 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2010-12-31 | $142,046 |
| Asset value of US Government securities at end of year | 2010-12-31 | $945,017,979 |
| Asset value of US Government securities at beginning of year | 2010-12-31 | $797,456,697 |
| Asset. Corporate debt instrument preferred debt at end of year | 2010-12-31 | $202,706,675 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2010-12-31 | $179,155,945 |
| Asset. Corporate debt instrument debt (other) at end of year | 2010-12-31 | $91,102,281 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2010-12-31 | $80,681,293 |
| Aggregate proceeds on sale of assets | 2010-12-31 | $1,242,256,081 |
| Aggregate carrying amount (costs) on sale of assets | 2010-12-31 | $1,241,927,191 |
