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. INTERMEDIATE GOVERNMENT/CREDIT BOND INDEX SECURITIES LENDING SERIES FUND CLASS I
401k plan membership statisitcs for STATE STREET U.S. INTERMEDIATE GOVERNMENT/CREDIT BOND INDEX SECURITIES LENDING SERIES FUND CLASS I
| Measure | Date | Value |
|---|
| 2022 : STATE STREET U.S. INTERMEDIATE GOVERNMENT/CREDIT BOND INDEX SECURITIES LENDING SERIES FUND CLASS I 2022 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2022-12-31 | $-27,820,789 |
| Total unrealized appreciation/depreciation of assets | 2022-12-31 | $-27,820,789 |
| Total transfer of assets to this plan | 2022-12-31 | $94,818,942 |
| Total transfer of assets from this plan | 2022-12-31 | $34,788,217 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-12-31 | $16,908,076 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-12-31 | $29,606,684 |
| Total income from all sources (including contributions) | 2022-12-31 | $-20,635,137 |
| Total loss/gain on sale of assets | 2022-12-31 | $2,208,908 |
| Total of all expenses incurred | 2022-12-31 | $34,948 |
| 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 | $320,565,636 |
| Value of total assets at beginning of year | 2022-12-31 | $293,903,604 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2022-12-31 | $34,948 |
| Total interest from all sources | 2022-12-31 | $4,976,744 |
| Total dividends received (eg from common stock, registered investment company shares) | 2022-12-31 | $0 |
| Administrative expenses professional fees incurred | 2022-12-31 | $6,029 |
| Assets. Other investments not covered elsewhere at end of year | 2022-12-31 | $7,893,910 |
| Assets. Other investments not covered elsewhere at beginning of year | 2022-12-31 | $8,235,141 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2022-12-31 | $2,084,493 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2022-12-31 | $1,403,245 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2022-12-31 | $16,908,076 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2022-12-31 | $29,606,684 |
| Administrative expenses (other) incurred | 2022-12-31 | $28,883 |
| Total non interest bearing cash at end of year | 2022-12-31 | $669 |
| Total non interest bearing cash at beginning of year | 2022-12-31 | $0 |
| Value of net income/loss | 2022-12-31 | $-20,670,085 |
| Value of net assets at end of year (total assets less liabilities) | 2022-12-31 | $303,657,560 |
| Value of net assets at beginning of year (total assets less liabilities) | 2022-12-31 | $264,296,920 |
| Investment advisory and management fees | 2022-12-31 | $36 |
| Interest earned on other investments | 2022-12-31 | $183,759 |
| Income. Interest from US Government securities | 2022-12-31 | $2,215,732 |
| Income. Interest from corporate debt instruments | 2022-12-31 | $2,535,098 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2022-12-31 | $19,200,488 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2022-12-31 | $29,673,701 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2022-12-31 | $29,673,701 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2022-12-31 | $42,155 |
| Asset value of US Government securities at end of year | 2022-12-31 | $187,714,791 |
| Asset value of US Government securities at beginning of year | 2022-12-31 | $156,419,128 |
| 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 | $52,733,656 |
| Asset. Corporate debt instrument debt (other) at end of year | 2022-12-31 | $103,671,285 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2022-12-31 | $45,438,733 |
| Aggregate proceeds on sale of assets | 2022-12-31 | $86,125,259 |
| Aggregate carrying amount (costs) on sale of assets | 2022-12-31 | $83,916,351 |
| 2021 : STATE STREET U.S. INTERMEDIATE GOVERNMENT/CREDIT BOND INDEX SECURITIES LENDING SERIES FUND CLASS I 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 | $0 |
| Total unrealized appreciation/depreciation of assets | 2021-12-31 | $0 |
| Total transfer of assets to this plan | 2021-12-31 | $39,034,086 |
| Total transfer of assets from this plan | 2021-12-31 | $50,077,510 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2021-12-31 | $29,606,684 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2021-12-31 | $16,104,291 |
| 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 | $-3,941,527 |
| Total loss/gain on sale of assets | 2021-12-31 | $-1,289,128 |
| Total of all expenses incurred | 2021-12-31 | $32,531 |
| 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 | $293,903,604 |
| Value of total assets at beginning of year | 2021-12-31 | $295,418,693 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2021-12-31 | $32,531 |
| Total interest from all sources | 2021-12-31 | $3,421,115 |
| 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 |
| Assets. Real estate other than employer real property at end of year | 2021-12-31 | $0 |
| Assets. Real estate other than employer real property at beginning of year | 2021-12-31 | $0 |
| Administrative expenses professional fees incurred | 2021-12-31 | $8,596 |
| 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 | $8,235,141 |
| Assets. Other investments not covered elsewhere at beginning of year | 2021-12-31 | $6,968,913 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2021-12-31 | $1,403,245 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2021-12-31 | $1,622,614 |
| 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 | $29,606,684 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2021-12-31 | $16,104,291 |
| Other income not declared elsewhere | 2021-12-31 | $0 |
| Administrative expenses (other) incurred | 2021-12-31 | $23,935 |
| 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 | $-3,974,058 |
| Value of net assets at end of year (total assets less liabilities) | 2021-12-31 | $264,296,920 |
| Value of net assets at beginning of year (total assets less liabilities) | 2021-12-31 | $279,314,402 |
| 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 | $105,378 |
| Income. Interest from US Government securities | 2021-12-31 | $1,238,488 |
| Income. Interest from corporate debt instruments | 2021-12-31 | $2,075,451 |
| 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 | $29,673,701 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2021-12-31 | $15,381,239 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2021-12-31 | $15,381,239 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2021-12-31 | $1,798 |
| 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 | $156,419,128 |
| Asset value of US Government securities at beginning of year | 2021-12-31 | $159,530,286 |
| 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 | $-6,073,514 |
| 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 | $52,733,656 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2021-12-31 | $60,072,487 |
| Asset. Corporate debt instrument debt (other) at end of year | 2021-12-31 | $45,438,733 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2021-12-31 | $51,843,154 |
| 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 | $109,537,086 |
| Aggregate carrying amount (costs) on sale of assets | 2021-12-31 | $110,826,214 |
| 2020 : STATE STREET U.S. INTERMEDIATE GOVERNMENT/CREDIT BOND INDEX SECURITIES LENDING SERIES FUND CLASS I 2020 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2020-12-31 | $10,706,483 |
| Total unrealized appreciation/depreciation of assets | 2020-12-31 | $10,706,483 |
| Total transfer of assets to this plan | 2020-12-31 | $60,660,833 |
| Total transfer of assets from this plan | 2020-12-31 | $67,835,312 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2020-12-31 | $16,104,291 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2020-12-31 | $32,773,669 |
| Total income from all sources (including contributions) | 2020-12-31 | $18,349,499 |
| Total loss/gain on sale of assets | 2020-12-31 | $2,312,762 |
| Total of all expenses incurred | 2020-12-31 | $34,367 |
| 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 | $295,418,693 |
| Value of total assets at beginning of year | 2020-12-31 | $300,947,418 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2020-12-31 | $34,367 |
| Total interest from all sources | 2020-12-31 | $5,330,254 |
| Total dividends received (eg from common stock, registered investment company shares) | 2020-12-31 | $0 |
| Administrative expenses professional fees incurred | 2020-12-31 | $12,267 |
| Assets. Other investments not covered elsewhere at end of year | 2020-12-31 | $6,968,913 |
| Assets. Other investments not covered elsewhere at beginning of year | 2020-12-31 | $5,988,569 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2020-12-31 | $1,622,614 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2020-12-31 | $2,886,901 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2020-12-31 | $16,104,291 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2020-12-31 | $32,773,669 |
| Administrative expenses (other) incurred | 2020-12-31 | $22,100 |
| Total non interest bearing cash at end of year | 2020-12-31 | $0 |
| Total non interest bearing cash at beginning of year | 2020-12-31 | $334 |
| Value of net income/loss | 2020-12-31 | $18,315,132 |
| Value of net assets at end of year (total assets less liabilities) | 2020-12-31 | $279,314,402 |
| Value of net assets at beginning of year (total assets less liabilities) | 2020-12-31 | $268,173,749 |
| Interest earned on other investments | 2020-12-31 | $214,814 |
| Income. Interest from US Government securities | 2020-12-31 | $2,337,516 |
| Income. Interest from corporate debt instruments | 2020-12-31 | $2,762,416 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2020-12-31 | $15,381,239 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2020-12-31 | $32,571,094 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2020-12-31 | $32,571,094 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2020-12-31 | $15,508 |
| Asset value of US Government securities at end of year | 2020-12-31 | $159,530,286 |
| Asset value of US Government securities at beginning of year | 2020-12-31 | $167,240,465 |
| Asset. Corporate debt instrument preferred debt at end of year | 2020-12-31 | $60,072,487 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2020-12-31 | $50,442,803 |
| Asset. Corporate debt instrument debt (other) at end of year | 2020-12-31 | $51,843,154 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2020-12-31 | $41,817,252 |
| Aggregate proceeds on sale of assets | 2020-12-31 | $235,150,150 |
| Aggregate carrying amount (costs) on sale of assets | 2020-12-31 | $232,837,388 |
| 2019 : STATE STREET U.S. INTERMEDIATE GOVERNMENT/CREDIT BOND INDEX SECURITIES LENDING SERIES FUND CLASS I 2019 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2019-12-31 | $7,611,937 |
| Total unrealized appreciation/depreciation of assets | 2019-12-31 | $7,611,937 |
| Total transfer of assets to this plan | 2019-12-31 | $42,256,704 |
| Total transfer of assets from this plan | 2019-12-31 | $21,043,786 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $32,773,669 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $25,308,050 |
| Total income from all sources (including contributions) | 2019-12-31 | $16,520,256 |
| Total loss/gain on sale of assets | 2019-12-31 | $2,413,228 |
| Total of all expenses incurred | 2019-12-31 | $30,350 |
| 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 | $300,947,418 |
| Value of total assets at beginning of year | 2019-12-31 | $255,778,975 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2019-12-31 | $30,350 |
| Total interest from all sources | 2019-12-31 | $6,495,091 |
| Total dividends received (eg from common stock, registered investment company shares) | 2019-12-31 | $0 |
| Administrative expenses professional fees incurred | 2019-12-31 | $10,809 |
| Assets. Other investments not covered elsewhere at end of year | 2019-12-31 | $5,988,569 |
| Assets. Other investments not covered elsewhere at beginning of year | 2019-12-31 | $5,114,618 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2019-12-31 | $2,886,901 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2019-12-31 | $4,183,978 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2019-12-31 | $32,773,669 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2019-12-31 | $25,308,050 |
| Administrative expenses (other) incurred | 2019-12-31 | $19,541 |
| Total non interest bearing cash at end of year | 2019-12-31 | $334 |
| Total non interest bearing cash at beginning of year | 2019-12-31 | $0 |
| Value of net income/loss | 2019-12-31 | $16,489,906 |
| Value of net assets at end of year (total assets less liabilities) | 2019-12-31 | $268,173,749 |
| Value of net assets at beginning of year (total assets less liabilities) | 2019-12-31 | $230,470,925 |
| Interest earned on other investments | 2019-12-31 | $217,285 |
| Income. Interest from US Government securities | 2019-12-31 | $3,377,808 |
| Income. Interest from corporate debt instruments | 2019-12-31 | $2,870,744 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2019-12-31 | $32,571,094 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2019-12-31 | $24,450,118 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2019-12-31 | $24,450,118 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2019-12-31 | $29,254 |
| Asset value of US Government securities at end of year | 2019-12-31 | $167,240,465 |
| Asset value of US Government securities at beginning of year | 2019-12-31 | $141,543,940 |
| Asset. Corporate debt instrument preferred debt at end of year | 2019-12-31 | $50,442,803 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2019-12-31 | $44,987,181 |
| Asset. Corporate debt instrument debt (other) at end of year | 2019-12-31 | $41,817,252 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2019-12-31 | $35,499,140 |
| Aggregate proceeds on sale of assets | 2019-12-31 | $122,631,403 |
| Aggregate carrying amount (costs) on sale of assets | 2019-12-31 | $120,218,175 |
| 2018 : STATE STREET U.S. INTERMEDIATE GOVERNMENT/CREDIT BOND INDEX SECURITIES LENDING SERIES FUND CLASS I 2018 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2018-12-31 | $-4,449,906 |
| Total unrealized appreciation/depreciation of assets | 2018-12-31 | $-4,449,906 |
| Total transfer of assets to this plan | 2018-12-31 | $51,396,906 |
| Total transfer of assets from this plan | 2018-12-31 | $220,237,983 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2018-12-31 | $25,308,050 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2018-12-31 | $126,658,936 |
| Total income from all sources (including contributions) | 2018-12-31 | $-79,210 |
| Total loss/gain on sale of assets | 2018-12-31 | $-3,886,040 |
| Total of all expenses incurred | 2018-12-31 | $38,305 |
| 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 | $255,778,975 |
| Value of total assets at beginning of year | 2018-12-31 | $526,088,453 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2018-12-31 | $38,305 |
| Total interest from all sources | 2018-12-31 | $8,256,736 |
| Total dividends received (eg from common stock, registered investment company shares) | 2018-12-31 | $0 |
| Administrative expenses professional fees incurred | 2018-12-31 | $11,927 |
| Assets. Other investments not covered elsewhere at end of year | 2018-12-31 | $5,114,618 |
| Assets. Other investments not covered elsewhere at beginning of year | 2018-12-31 | $10,244,864 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2018-12-31 | $4,183,978 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2018-12-31 | $4,356,946 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2018-12-31 | $25,308,050 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2018-12-31 | $126,658,936 |
| Administrative expenses (other) incurred | 2018-12-31 | $26,378 |
| Value of net income/loss | 2018-12-31 | $-117,515 |
| Value of net assets at end of year (total assets less liabilities) | 2018-12-31 | $230,470,925 |
| Value of net assets at beginning of year (total assets less liabilities) | 2018-12-31 | $399,429,517 |
| Interest earned on other investments | 2018-12-31 | $391,596 |
| Income. Interest from US Government securities | 2018-12-31 | $4,007,462 |
| Income. Interest from corporate debt instruments | 2018-12-31 | $3,839,538 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2018-12-31 | $24,450,118 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2018-12-31 | $124,711,144 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2018-12-31 | $124,711,144 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2018-12-31 | $18,140 |
| Asset value of US Government securities at end of year | 2018-12-31 | $141,543,940 |
| Asset value of US Government securities at beginning of year | 2018-12-31 | $238,944,557 |
| Asset. Corporate debt instrument preferred debt at end of year | 2018-12-31 | $44,987,181 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2018-12-31 | $81,203,771 |
| Asset. Corporate debt instrument debt (other) at end of year | 2018-12-31 | $35,499,140 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2018-12-31 | $66,627,171 |
| Aggregate proceeds on sale of assets | 2018-12-31 | $206,942,881 |
| Aggregate carrying amount (costs) on sale of assets | 2018-12-31 | $210,828,921 |
| 2017 : STATE STREET U.S. INTERMEDIATE GOVERNMENT/CREDIT BOND INDEX SECURITIES LENDING SERIES FUND CLASS I 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 | $-1,000,214 |
| Total unrealized appreciation/depreciation of assets | 2017-12-31 | $-1,000,214 |
| Total transfer of assets to this plan | 2017-12-31 | $53,158,007 |
| Total transfer of assets from this plan | 2017-12-31 | $75,655,907 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2017-12-31 | $126,658,936 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2017-12-31 | $89,105,189 |
| 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 | $9,408,362 |
| Total loss/gain on sale of assets | 2017-12-31 | $374,223 |
| Total of all expenses incurred | 2017-12-31 | $49,273 |
| 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 | $526,088,453 |
| Value of total assets at beginning of year | 2017-12-31 | $501,673,517 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2017-12-31 | $49,273 |
| Total interest from all sources | 2017-12-31 | $10,034,353 |
| 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 | $16,075 |
| Assets. Other investments not covered elsewhere at end of year | 2017-12-31 | $10,244,864 |
| Assets. Other investments not covered elsewhere at beginning of year | 2017-12-31 | $8,908,200 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2017-12-31 | $4,356,946 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2017-12-31 | $4,587,108 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2017-12-31 | $126,658,936 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2017-12-31 | $89,105,189 |
| Other income not declared elsewhere | 2017-12-31 | $0 |
| Administrative expenses (other) incurred | 2017-12-31 | $33,198 |
| 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 | $2,259 |
| Value of net income/loss | 2017-12-31 | $9,359,089 |
| Value of net assets at end of year (total assets less liabilities) | 2017-12-31 | $399,429,517 |
| Value of net assets at beginning of year (total assets less liabilities) | 2017-12-31 | $412,568,328 |
| 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 | $509,911 |
| Income. Interest from US Government securities | 2017-12-31 | $4,482,833 |
| Income. Interest from corporate debt instruments | 2017-12-31 | $5,029,919 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2017-12-31 | $124,711,144 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2017-12-31 | $83,347,381 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2017-12-31 | $83,347,381 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2017-12-31 | $11,690 |
| Asset value of US Government securities at end of year | 2017-12-31 | $238,944,557 |
| Asset value of US Government securities at beginning of year | 2017-12-31 | $241,538,650 |
| 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 | $81,203,771 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2017-12-31 | $92,062,897 |
| Asset. Corporate debt instrument debt (other) at end of year | 2017-12-31 | $66,627,171 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2017-12-31 | $71,227,022 |
| Contract administrator fees | 2017-12-31 | $0 |
| Aggregate proceeds on sale of assets | 2017-12-31 | $120,850,114 |
| Aggregate carrying amount (costs) on sale of assets | 2017-12-31 | $120,475,891 |
| 2016 : STATE STREET U.S. INTERMEDIATE GOVERNMENT/CREDIT BOND INDEX SECURITIES LENDING SERIES FUND CLASS I 2016 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2016-12-31 | $-1,605,525 |
| Total unrealized appreciation/depreciation of assets | 2016-12-31 | $-1,605,525 |
| Total transfer of assets to this plan | 2016-12-31 | $68,969,855 |
| Total transfer of assets from this plan | 2016-12-31 | $67,150,783 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2016-12-31 | $89,105,189 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2016-12-31 | $88,600,931 |
| Total income from all sources (including contributions) | 2016-12-31 | $8,720,308 |
| Total loss/gain on sale of assets | 2016-12-31 | $120,368 |
| Total of all expenses incurred | 2016-12-31 | $50,446 |
| 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 | $501,673,517 |
| Value of total assets at beginning of year | 2016-12-31 | $490,680,325 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2016-12-31 | $50,446 |
| Total interest from all sources | 2016-12-31 | $10,205,465 |
| Total dividends received (eg from common stock, registered investment company shares) | 2016-12-31 | $0 |
| Administrative expenses professional fees incurred | 2016-12-31 | $24,780 |
| Assets. Other investments not covered elsewhere at end of year | 2016-12-31 | $8,908,200 |
| Assets. Other investments not covered elsewhere at beginning of year | 2016-12-31 | $9,741,919 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2016-12-31 | $4,587,108 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2016-12-31 | $7,724,062 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2016-12-31 | $89,105,189 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2016-12-31 | $88,600,931 |
| Administrative expenses (other) incurred | 2016-12-31 | $25,666 |
| Total non interest bearing cash at end of year | 2016-12-31 | $2,259 |
| Total non interest bearing cash at beginning of year | 2016-12-31 | $0 |
| Value of net income/loss | 2016-12-31 | $8,669,862 |
| Value of net assets at end of year (total assets less liabilities) | 2016-12-31 | $412,568,328 |
| Value of net assets at beginning of year (total assets less liabilities) | 2016-12-31 | $402,079,394 |
| Interest earned on other investments | 2016-12-31 | $474,519 |
| Income. Interest from US Government securities | 2016-12-31 | $4,468,173 |
| Income. Interest from corporate debt instruments | 2016-12-31 | $5,251,126 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2016-12-31 | $83,347,381 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2016-12-31 | $89,660,994 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2016-12-31 | $89,660,994 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2016-12-31 | $11,647 |
| Asset value of US Government securities at end of year | 2016-12-31 | $241,538,650 |
| Asset value of US Government securities at beginning of year | 2016-12-31 | $245,361,737 |
| Asset. Corporate debt instrument preferred debt at end of year | 2016-12-31 | $92,062,897 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2016-12-31 | $79,149,283 |
| Asset. Corporate debt instrument debt (other) at end of year | 2016-12-31 | $71,227,022 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2016-12-31 | $59,042,330 |
| Aggregate proceeds on sale of assets | 2016-12-31 | $120,419,739 |
| Aggregate carrying amount (costs) on sale of assets | 2016-12-31 | $120,299,371 |
| 2015 : STATE STREET U.S. INTERMEDIATE GOVERNMENT/CREDIT BOND INDEX SECURITIES LENDING SERIES FUND CLASS I 2015 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2015-12-31 | $-3,716,206 |
| Total unrealized appreciation/depreciation of assets | 2015-12-31 | $-3,716,206 |
| Total transfer of assets to this plan | 2015-12-31 | $60,631,335 |
| Total transfer of assets from this plan | 2015-12-31 | $65,800,111 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2015-12-31 | $88,600,931 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2015-12-31 | $100,207,190 |
| Total income from all sources (including contributions) | 2015-12-31 | $4,543,450 |
| Total loss/gain on sale of assets | 2015-12-31 | $-1,874,181 |
| Total of all expenses incurred | 2015-12-31 | $75,709 |
| 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 | $490,680,325 |
| Value of total assets at beginning of year | 2015-12-31 | $502,987,619 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2015-12-31 | $75,709 |
| Total interest from all sources | 2015-12-31 | $10,133,837 |
| Total dividends received (eg from common stock, registered investment company shares) | 2015-12-31 | $0 |
| Administrative expenses professional fees incurred | 2015-12-31 | $19,204 |
| Assets. Other investments not covered elsewhere at end of year | 2015-12-31 | $9,741,919 |
| Assets. Other investments not covered elsewhere at beginning of year | 2015-12-31 | $10,627,013 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2015-12-31 | $7,724,062 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2015-12-31 | $5,440,656 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2015-12-31 | $88,600,931 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2015-12-31 | $100,207,190 |
| Administrative expenses (other) incurred | 2015-12-31 | $56,505 |
| 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 | $3 |
| Value of net income/loss | 2015-12-31 | $4,467,741 |
| Value of net assets at end of year (total assets less liabilities) | 2015-12-31 | $402,079,394 |
| Value of net assets at beginning of year (total assets less liabilities) | 2015-12-31 | $402,780,429 |
| Interest earned on other investments | 2015-12-31 | $485,157 |
| Income. Interest from US Government securities | 2015-12-31 | $4,548,698 |
| Income. Interest from corporate debt instruments | 2015-12-31 | $5,097,743 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2015-12-31 | $89,660,994 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2015-12-31 | $98,434,697 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2015-12-31 | $98,434,697 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2015-12-31 | $2,239 |
| Asset value of US Government securities at end of year | 2015-12-31 | $245,361,737 |
| Asset value of US Government securities at beginning of year | 2015-12-31 | $249,325,742 |
| Asset. Corporate debt instrument preferred debt at end of year | 2015-12-31 | $79,149,283 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2015-12-31 | $89,441,610 |
| Asset. Corporate debt instrument debt (other) at end of year | 2015-12-31 | $59,042,330 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2015-12-31 | $49,717,898 |
| Aggregate proceeds on sale of assets | 2015-12-31 | $222,542,364 |
| Aggregate carrying amount (costs) on sale of assets | 2015-12-31 | $224,416,545 |
| 2014 : STATE STREET U.S. INTERMEDIATE GOVERNMENT/CREDIT BOND INDEX SECURITIES LENDING SERIES FUND CLASS I 2014 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2014-12-31 | $2,275,631 |
| Total unrealized appreciation/depreciation of assets | 2014-12-31 | $2,275,631 |
| Total transfer of assets to this plan | 2014-12-31 | $95,305,134 |
| Total transfer of assets from this plan | 2014-12-31 | $60,629,834 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2014-12-31 | $100,207,190 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2014-12-31 | $13,448,938 |
| Total income from all sources (including contributions) | 2014-12-31 | $11,862,918 |
| Total loss/gain on sale of assets | 2014-12-31 | $35,946 |
| Total of all expenses incurred | 2014-12-31 | $65,542 |
| 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 | $502,987,619 |
| Value of total assets at beginning of year | 2014-12-31 | $369,756,691 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2014-12-31 | $65,542 |
| Total interest from all sources | 2014-12-31 | $9,551,341 |
| Total dividends received (eg from common stock, registered investment company shares) | 2014-12-31 | $0 |
| Administrative expenses professional fees incurred | 2014-12-31 | $17,532 |
| Assets. Other investments not covered elsewhere at end of year | 2014-12-31 | $10,627,013 |
| Assets. Other investments not covered elsewhere at beginning of year | 2014-12-31 | $8,626,028 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2014-12-31 | $5,440,656 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2014-12-31 | $3,220,704 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2014-12-31 | $100,207,190 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2014-12-31 | $13,448,938 |
| Administrative expenses (other) incurred | 2014-12-31 | $48,010 |
| Total non interest bearing cash at end of year | 2014-12-31 | $3 |
| Total non interest bearing cash at beginning of year | 2014-12-31 | $708 |
| Value of net income/loss | 2014-12-31 | $11,797,376 |
| Value of net assets at end of year (total assets less liabilities) | 2014-12-31 | $402,780,429 |
| Value of net assets at beginning of year (total assets less liabilities) | 2014-12-31 | $356,307,753 |
| Interest earned on other investments | 2014-12-31 | $440,868 |
| Income. Interest from US Government securities | 2014-12-31 | $4,199,765 |
| Income. Interest from corporate debt instruments | 2014-12-31 | $4,907,895 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2014-12-31 | $98,434,697 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2014-12-31 | $10,503,156 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2014-12-31 | $10,503,156 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2014-12-31 | $2,813 |
| Asset value of US Government securities at end of year | 2014-12-31 | $249,325,742 |
| Asset value of US Government securities at beginning of year | 2014-12-31 | $223,774,276 |
| Asset. Corporate debt instrument preferred debt at end of year | 2014-12-31 | $89,441,610 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2014-12-31 | $83,206,742 |
| Asset. Corporate debt instrument debt (other) at end of year | 2014-12-31 | $49,717,898 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2014-12-31 | $40,425,077 |
| Aggregate proceeds on sale of assets | 2014-12-31 | $163,691,076 |
| Aggregate carrying amount (costs) on sale of assets | 2014-12-31 | $163,655,130 |
| 2013 : STATE STREET U.S. INTERMEDIATE GOVERNMENT/CREDIT BOND INDEX SECURITIES LENDING SERIES FUND CLASS I 2013 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2013-12-31 | $-11,317,610 |
| Total unrealized appreciation/depreciation of assets | 2013-12-31 | $-11,317,610 |
| Total transfer of assets to this plan | 2013-12-31 | $39,779,998 |
| Total transfer of assets from this plan | 2013-12-31 | $104,583,035 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2013-12-31 | $13,448,938 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2013-12-31 | $63,625,533 |
| Total income from all sources (including contributions) | 2013-12-31 | $-3,458,457 |
| Total loss/gain on sale of assets | 2013-12-31 | $-968,453 |
| Total of all expenses incurred | 2013-12-31 | $77,217 |
| 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 | $369,756,691 |
| Value of total assets at beginning of year | 2013-12-31 | $488,271,997 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2013-12-31 | $77,217 |
| Total interest from all sources | 2013-12-31 | $8,827,606 |
| Total dividends received (eg from common stock, registered investment company shares) | 2013-12-31 | $0 |
| Administrative expenses professional fees incurred | 2013-12-31 | $15,291 |
| Assets. Other investments not covered elsewhere at end of year | 2013-12-31 | $8,626,028 |
| Assets. Other investments not covered elsewhere at beginning of year | 2013-12-31 | $9,293,830 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2013-12-31 | $3,220,704 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2013-12-31 | $4,574,517 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2013-12-31 | $13,448,938 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2013-12-31 | $63,625,533 |
| Administrative expenses (other) incurred | 2013-12-31 | $61,926 |
| Total non interest bearing cash at end of year | 2013-12-31 | $708 |
| Total non interest bearing cash at beginning of year | 2013-12-31 | $0 |
| Value of net income/loss | 2013-12-31 | $-3,535,674 |
| Value of net assets at end of year (total assets less liabilities) | 2013-12-31 | $356,307,753 |
| Value of net assets at beginning of year (total assets less liabilities) | 2013-12-31 | $424,646,464 |
| Interest earned on other investments | 2013-12-31 | $332,623 |
| Income. Interest from US Government securities | 2013-12-31 | $3,870,403 |
| Income. Interest from corporate debt instruments | 2013-12-31 | $4,621,996 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2013-12-31 | $10,503,156 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2013-12-31 | $62,708,352 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2013-12-31 | $62,708,352 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2013-12-31 | $2,584 |
| Asset value of US Government securities at end of year | 2013-12-31 | $223,774,276 |
| Asset value of US Government securities at beginning of year | 2013-12-31 | $278,039,780 |
| Asset. Corporate debt instrument preferred debt at end of year | 2013-12-31 | $83,206,742 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2013-12-31 | $91,894,003 |
| Asset. Corporate debt instrument debt (other) at end of year | 2013-12-31 | $40,425,077 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2013-12-31 | $41,761,515 |
| Aggregate proceeds on sale of assets | 2013-12-31 | $125,462,239 |
| Aggregate carrying amount (costs) on sale of assets | 2013-12-31 | $126,430,692 |
| 2012 : STATE STREET U.S. INTERMEDIATE GOVERNMENT/CREDIT BOND INDEX SECURITIES LENDING SERIES FUND CLASS I 2012 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2012-12-31 | $5,787,204 |
| Total unrealized appreciation/depreciation of assets | 2012-12-31 | $5,787,204 |
| Total transfer of assets to this plan | 2012-12-31 | $74,516,881 |
| Total transfer of assets from this plan | 2012-12-31 | $94,771,781 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2012-12-31 | $63,625,533 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2012-12-31 | $96,830,983 |
| Total income from all sources (including contributions) | 2012-12-31 | $16,494,249 |
| Total loss/gain on sale of assets | 2012-12-31 | $-114,498 |
| Total of all expenses incurred | 2012-12-31 | $85,827 |
| 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 | $488,271,997 |
| Value of total assets at beginning of year | 2012-12-31 | $525,323,925 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2012-12-31 | $85,827 |
| Total interest from all sources | 2012-12-31 | $10,821,543 |
| Total dividends received (eg from common stock, registered investment company shares) | 2012-12-31 | $0 |
| Administrative expenses professional fees incurred | 2012-12-31 | $20,479 |
| Assets. Other investments not covered elsewhere at end of year | 2012-12-31 | $9,293,830 |
| Assets. Other investments not covered elsewhere at beginning of year | 2012-12-31 | $11,631,471 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2012-12-31 | $4,574,517 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2012-12-31 | $4,092,029 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2012-12-31 | $63,625,533 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2012-12-31 | $96,830,983 |
| Administrative expenses (other) incurred | 2012-12-31 | $65,348 |
| 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 | $1,567 |
| Value of net income/loss | 2012-12-31 | $16,408,422 |
| Value of net assets at end of year (total assets less liabilities) | 2012-12-31 | $424,646,464 |
| Value of net assets at beginning of year (total assets less liabilities) | 2012-12-31 | $428,492,942 |
| Interest earned on other investments | 2012-12-31 | $499,596 |
| Income. Interest from US Government securities | 2012-12-31 | $4,798,670 |
| Income. Interest from corporate debt instruments | 2012-12-31 | $5,512,391 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2012-12-31 | $62,708,352 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2012-12-31 | $101,813,357 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2012-12-31 | $101,813,357 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2012-12-31 | $10,886 |
| Asset value of US Government securities at end of year | 2012-12-31 | $278,039,780 |
| Asset value of US Government securities at beginning of year | 2012-12-31 | $275,572,948 |
| Asset. Corporate debt instrument preferred debt at end of year | 2012-12-31 | $91,894,003 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2012-12-31 | $90,649,958 |
| Asset. Corporate debt instrument debt (other) at end of year | 2012-12-31 | $41,761,515 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2012-12-31 | $41,562,595 |
| Aggregate proceeds on sale of assets | 2012-12-31 | $110,745,138 |
| Aggregate carrying amount (costs) on sale of assets | 2012-12-31 | $110,859,636 |
| 2011 : STATE STREET U.S. INTERMEDIATE GOVERNMENT/CREDIT BOND INDEX SECURITIES LENDING SERIES FUND CLASS I 2011 401k financial data |
|---|
| Unrealized appreciation/depreciation of real estate assets | 2011-12-31 | $11,744,049 |
| Total unrealized appreciation/depreciation of assets | 2011-12-31 | $11,744,049 |
| Total transfer of assets to this plan | 2011-12-31 | $153,720,473 |
| Total transfer of assets from this plan | 2011-12-31 | $104,266,770 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2011-12-31 | $96,830,983 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2011-12-31 | $59,805,369 |
| Total income from all sources (including contributions) | 2011-12-31 | $23,149,907 |
| Total loss/gain on sale of assets | 2011-12-31 | $-332,923 |
| Total of all expenses incurred | 2011-12-31 | $80,070 |
| 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 | $525,323,925 |
| Value of total assets at beginning of year | 2011-12-31 | $415,774,771 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2011-12-31 | $80,070 |
| Total interest from all sources | 2011-12-31 | $11,738,781 |
| Total dividends received (eg from common stock, registered investment company shares) | 2011-12-31 | $0 |
| Administrative expenses professional fees incurred | 2011-12-31 | $21,378 |
| Assets. Other investments not covered elsewhere at end of year | 2011-12-31 | $11,631,471 |
| Assets. Other investments not covered elsewhere at beginning of year | 2011-12-31 | $9,358,189 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2011-12-31 | $4,092,029 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2011-12-31 | $3,057,210 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2011-12-31 | $96,830,983 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2011-12-31 | $59,805,369 |
| Administrative expenses (other) incurred | 2011-12-31 | $58,692 |
| Total non interest bearing cash at end of year | 2011-12-31 | $1,567 |
| Value of net income/loss | 2011-12-31 | $23,069,837 |
| Value of net assets at end of year (total assets less liabilities) | 2011-12-31 | $428,492,942 |
| Value of net assets at beginning of year (total assets less liabilities) | 2011-12-31 | $355,969,402 |
| Interest earned on other investments | 2011-12-31 | $566,607 |
| Income. Interest from US Government securities | 2011-12-31 | $5,302,651 |
| Income. Interest from corporate debt instruments | 2011-12-31 | $5,860,738 |
| 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 | $101,813,357 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2011-12-31 | $58,157,110 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2011-12-31 | $58,157,110 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2011-12-31 | $8,785 |
| Asset value of US Government securities at end of year | 2011-12-31 | $275,572,948 |
| Asset value of US Government securities at beginning of year | 2011-12-31 | $235,003,315 |
| Asset. Corporate debt instrument preferred debt at end of year | 2011-12-31 | $90,649,958 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2011-12-31 | $78,353,846 |
| Asset. Corporate debt instrument debt (other) at end of year | 2011-12-31 | $41,562,595 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2011-12-31 | $31,845,101 |
| Aggregate proceeds on sale of assets | 2011-12-31 | $143,273,205 |
| Aggregate carrying amount (costs) on sale of assets | 2011-12-31 | $143,606,128 |
| 2010 : STATE STREET U.S. INTERMEDIATE GOVERNMENT/CREDIT BOND INDEX SECURITIES LENDING SERIES FUND CLASS I 2010 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2010-12-31 | $-336,006,247 |
| Total unrealized appreciation/depreciation of assets | 2010-12-31 | $-336,006,247 |
| Total transfer of assets to this plan | 2010-12-31 | $344,771,140 |
| Total transfer of assets from this plan | 2010-12-31 | $164,177,596 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2010-12-31 | $59,805,369 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2010-12-31 | $203,467,331 |
| Total income from all sources (including contributions) | 2010-12-31 | $-320,577,461 |
| Total loss/gain on sale of assets | 2010-12-31 | $1,291,112 |
| Total of all expenses incurred | 2010-12-31 | $101,686 |
| 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 | $415,774,771 |
| Value of total assets at beginning of year | 2010-12-31 | $699,522,336 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2010-12-31 | $101,686 |
| Total interest from all sources | 2010-12-31 | $14,137,674 |
| Total dividends received (eg from common stock, registered investment company shares) | 2010-12-31 | $0 |
| Administrative expenses professional fees incurred | 2010-12-31 | $19,839 |
| Assets. Other investments not covered elsewhere at end of year | 2010-12-31 | $9,358,189 |
| Assets. Other investments not covered elsewhere at beginning of year | 2010-12-31 | $10,120,377 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2010-12-31 | $3,057,210 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2010-12-31 | $9,881,889 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2010-12-31 | $59,805,369 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2010-12-31 | $203,467,331 |
| Administrative expenses (other) incurred | 2010-12-31 | $81,847 |
| Value of net income/loss | 2010-12-31 | $-320,679,147 |
| Value of net assets at end of year (total assets less liabilities) | 2010-12-31 | $355,969,402 |
| Value of net assets at beginning of year (total assets less liabilities) | 2010-12-31 | $496,055,005 |
| Interest earned on other investments | 2010-12-31 | $637,576 |
| Income. Interest from US Government securities | 2010-12-31 | $6,464,157 |
| Income. Interest from corporate debt instruments | 2010-12-31 | $7,022,006 |
| 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 | $58,157,110 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2010-12-31 | $192,338,404 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2010-12-31 | $192,338,404 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2010-12-31 | $13,935 |
| Asset value of US Government securities at end of year | 2010-12-31 | $235,003,315 |
| Asset value of US Government securities at beginning of year | 2010-12-31 | $307,136,681 |
| Asset. Corporate debt instrument preferred debt at end of year | 2010-12-31 | $78,353,846 |
| Asset. Corporate debt instrument preferred debt at beginning of year | 2010-12-31 | $129,450,069 |
| Asset. Corporate debt instrument debt (other) at end of year | 2010-12-31 | $31,845,101 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2010-12-31 | $50,594,916 |
| Aggregate proceeds on sale of assets | 2010-12-31 | $196,449,029 |
| Aggregate carrying amount (costs) on sale of assets | 2010-12-31 | $195,157,917 |
