| Form N-CSR Cover | 12 Months Ended |
| Aug. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | SSGA FUNDS |
| Entity Central Index Key | 0000826686 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Aug. 31, 2024 |
| Shareholder Report | 12 Months Ended |
| Aug. 31, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | SSGA FUNDS |
| Entity Central Index Key | 0000826686 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Aug. 31, 2024 |
| C000143790 | |
| Shareholder Report [Line Items] | |
| Fund Name | State Street International Stock Selection Fund |
| Class Name | Class A |
| Trading Symbol | SSILX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the State Street International Stock Selection Fund (the "Fund") for the period of September 1, 2023 to August 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf |
| Additional Information Phone Number | 1-800-647-7327 |
| Additional Information Website | www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf</span>" id="sjs-B19"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf</span> |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $136 1.24% |
| Expenses Paid, Amount | $ 136 |
| Expense Ratio, Percent | 1.24% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Value and Sentiment-based factors were the primary drivers of Fund performance during the reporting period relative to the Index. Both themes yielded positive returns as companies with lower valuation and good market sentiment outperformed their more expensive and unfavored peers. Stock selection in each of the Industrials, Consumer Discretionary and Health Care sectors was the largest positive contribution to Fund performance. At the regional level, stock selection was most successful in Europe and Asia Pacific ex Japan. |
| Performance Past Does Not Indicate Future [Text] | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future. The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption or sale of Fund shares. Updated performance information is available by calling 1-800-647-7327 or visiting our website at <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 700; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.ssga.com</span>.</span></p>" id="sjs-B24"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future. The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption or sale of Fund shares. Updated performance information is available by calling 1-800-647-7327 or visiting our website at <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 700; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.ssga.com</span>.</span></p> |
| Line Graph [Table Text Block] | SSILX with load MSCI EAFE Net Dividend Index 08/31/14 $9,477 $10,000 09/30/14 $9,181 $9,616 10/31/14 $9,072 $9,476 11/30/14 $9,232 $9,605 12/31/14 $8,890 $9,272 01/31/15 $9,001 $9,317 02/28/15 $9,512 $9,874 03/31/15 $9,384 $9,724 04/30/15 $9,742 $10,122 05/31/15 $9,818 $10,070 06/30/15 $9,529 $9,784 07/31/15 $9,640 $9,988 08/31/15 $9,061 $9,253 09/30/15 $8,677 $8,783 10/31/15 $9,256 $9,470 11/30/15 $9,146 $9,322 12/31/15 $8,939 $9,197 01/31/16 $8,396 $8,532 02/29/16 $8,134 $8,375 03/31/16 $8,598 $8,920 04/30/16 $8,869 $9,179 05/31/16 $8,834 $9,095 06/30/16 $8,449 $8,790 07/31/16 $8,825 $9,235 08/31/16 $8,799 $9,242 09/30/16 $8,957 $9,355 10/31/16 $8,799 $9,164 11/30/16 $8,677 $8,982 12/31/16 $8,939 $9,289 01/31/17 $9,245 $9,558 02/28/17 $9,280 $9,695 03/31/17 $9,523 $9,962 04/30/17 $9,810 $10,215 05/31/17 $10,196 $10,590 06/30/17 $10,232 $10,571 07/31/17 $10,519 $10,876 08/31/17 $10,555 $10,872 09/30/17 $10,743 $11,143 10/31/17 $10,869 $11,312 11/30/17 $10,824 $11,431 12/31/17 $10,937 $11,614 01/31/18 $11,300 $12,197 02/28/18 $10,751 $11,646 03/31/18 $10,602 $11,436 04/30/18 $10,713 $11,697 05/31/18 $10,471 $11,434 06/30/18 $10,229 $11,295 07/31/18 $10,471 $11,573 08/31/18 $10,201 $11,349 09/30/18 $10,322 $11,448 10/31/18 $9,568 $10,537 11/30/18 $9,364 $10,523 12/31/18 $8,968 $10,012 01/31/19 $9,647 $10,670 02/28/19 $9,844 $10,942 03/31/19 $9,923 $11,011 04/30/19 $10,051 $11,321 05/31/19 $9,470 $10,777 06/30/19 $10,031 $11,417 07/31/19 $9,687 $11,272 08/31/19 $9,441 $10,980 09/30/19 $9,716 $11,294 10/31/19 $10,031 $11,700 11/30/19 $10,110 $11,832 12/31/19 $10,448 $12,217 01/31/20 $10,184 $11,961 02/29/20 $9,301 $10,880 03/31/20 $7,798 $9,428 04/30/20 $8,367 $10,037 05/31/20 $8,702 $10,474 06/30/20 $9,007 $10,831 07/31/20 $9,159 $11,083 08/31/20 $9,606 $11,653 09/30/20 $9,372 $11,350 10/31/20 $8,946 $10,897 11/30/20 $10,174 $12,586 12/31/20 $10,722 $13,171 01/31/21 $10,619 $13,031 02/28/21 $10,846 $13,323 03/31/21 $11,301 $13,630 04/30/21 $11,673 $14,040 05/31/21 $12,189 $14,498 06/30/21 $12,013 $14,334 07/31/21 $12,034 $14,442 08/31/21 $12,230 $14,697 09/30/21 $11,745 $14,271 10/31/21 $12,024 $14,622 11/30/21 $11,435 $13,941 12/31/21 $12,054 $14,655 01/31/22 $11,774 $13,947 02/28/22 $11,397 $13,700 03/31/22 $11,559 $13,788 04/30/22 $10,891 $12,896 05/31/22 $11,160 $12,993 06/30/22 $9,868 $11,787 07/31/22 $10,352 $12,375 08/31/22 $9,814 $11,787 09/30/22 $8,780 $10,684 10/31/22 $9,394 $11,259 11/30/22 $10,546 $12,527 12/31/22 $10,389 $12,537 01/31/23 $11,179 $13,552 02/28/23 $10,941 $13,269 03/31/23 $11,070 $13,598 04/30/23 $11,308 $13,982 05/31/23 $10,746 $13,391 06/30/23 $11,384 $14,000 07/31/23 $11,730 $14,453 08/31/23 $11,254 $13,899 09/30/23 $11,006 $13,424 10/31/23 $10,530 $12,880 11/30/23 $11,362 $14,076 12/31/23 $11,913 $14,824 01/31/24 $11,968 $14,909 02/29/24 $12,233 $15,182 03/31/24 $12,797 $15,681 04/30/24 $12,465 $15,279 05/31/24 $13,150 $15,871 06/30/24 $12,708 $15,615 07/31/24 $13,095 $16,073 08/31/24 $13,492 $16,596 |
| Average Annual Return [Table Text Block] | Name 1 Year 5 Years 10 Years SSILX (Net Asset Value) 19.89% 7.40% 3.60% SSILX (Adjusted for the 5.25% Maximum Sales Charge) 13.56% 6.25% 3.04% MSCI EAFE Net Dividend Index 19.40% 8.61% 5.20% |
| AssetsNet | $ 139,639,104 |
| Holdings Count | Holding | 176 |
| Advisory Fees Paid, Amount | $ 644,803 |
| InvestmentCompanyPortfolioTurnover | 98% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics as of 8/31/2024 Statistic Value Total Net Assets $139,639,104 Number of Portfolio Holdings 176 Portfolio Turnover Rate 98% Total Advisory Fees Paid $644,803 |
| Holdings [Text Block] | Top Ten Countries Country % Value of Total Net Assets Japan 22.0% United Kingdom 10.4% Germany 9.5% France 9.0% United States 7.6% Australia 5.9% Switzerland 5.3% Netherlands 5.1% Italy 4.0% Spain 3.9% |
| Material Fund Change [Text Block] | |
| Accountant Change Statement [Text Block] | |
| C000143792 | |
| Shareholder Report [Line Items] | |
| Fund Name | State Street International Stock Selection Fund |
| Class Name | Class I |
| Trading Symbol | SSIPX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the State Street International Stock Selection Fund (the "Fund") for the period of September 1, 2023 to August 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf |
| Additional Information Phone Number | 1-800-647-7327 |
| Additional Information Website | www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf</span>" id="sjs-B44"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf</span> |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $93 0.84% |
| Expenses Paid, Amount | $ 93 |
| Expense Ratio, Percent | 0.84% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Value and Sentiment-based factors were the primary drivers of Fund performance during the reporting period relative to the Index. Both themes yielded positive returns as companies with lower valuation and good market sentiment outperformed their more expensive and unfavored peers. Stock selection in each of the Industrials, Consumer Discretionary and Health Care sectors was the largest positive contribution to Fund performance. At the regional level, stock selection was most successful in Europe and Asia Pacific ex Japan. |
| Performance Past Does Not Indicate Future [Text] | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future. The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption or sale of Fund shares. Updated performance information is available by calling 1-800-647-7327 or visiting our website at <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 700; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.ssga.com</span>.</span></p>" id="sjs-B49"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future. The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption or sale of Fund shares. Updated performance information is available by calling 1-800-647-7327 or visiting our website at <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 700; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.ssga.com</span>.</span></p> |
| Line Graph [Table Text Block] | SSIPX MSCI EAFE Net Dividend Index 08/31/14 $10,000 $10,000 09/30/14 $9,680 $9,616 10/31/14 $9,564 $9,476 11/30/14 $9,742 $9,605 12/31/14 $9,381 $9,272 01/31/15 $9,507 $9,317 02/28/15 $10,047 $9,874 03/31/15 $9,912 $9,724 04/30/15 $10,299 $10,122 05/31/15 $10,380 $10,070 06/30/15 $10,074 $9,784 07/31/15 $10,182 $9,988 08/31/15 $9,579 $9,253 09/30/15 $9,174 $8,783 10/31/15 $9,786 $9,470 11/30/15 $9,678 $9,322 12/31/15 $9,469 $9,197 01/31/16 $8,887 $8,532 02/29/16 $8,619 $8,375 03/31/16 $9,099 $8,920 04/30/16 $9,395 $9,179 05/31/16 $9,367 $9,095 06/30/16 $8,951 $8,790 07/31/16 $9,358 $9,235 08/31/16 $9,330 $9,242 09/30/16 $9,496 $9,355 10/31/16 $9,339 $9,164 11/30/16 $9,201 $8,982 12/31/16 $9,489 $9,289 01/31/17 $9,811 $9,558 02/28/17 $9,859 $9,695 03/31/17 $10,115 $9,962 04/30/17 $10,429 $10,215 05/31/17 $10,837 $10,590 06/30/17 $10,875 $10,571 07/31/17 $11,189 $10,876 08/31/17 $11,217 $10,872 09/30/17 $11,426 $11,143 10/31/17 $11,559 $11,312 11/30/17 $11,512 $11,431 12/31/17 $11,629 $11,614 01/31/18 $12,024 $12,197 02/28/18 $11,452 $11,646 03/31/18 $11,304 $11,436 04/30/18 $11,422 $11,697 05/31/18 $11,175 $11,434 06/30/18 $10,929 $11,295 07/31/18 $11,185 $11,573 08/31/18 $10,899 $11,349 09/30/18 $11,027 $11,448 10/31/18 $10,228 $10,537 11/30/18 $10,020 $10,523 12/31/18 $9,598 $10,012 01/31/19 $10,322 $10,670 02/28/19 $10,543 $10,942 03/31/19 $10,637 $11,011 04/30/19 $10,763 $11,321 05/31/19 $10,154 $10,777 06/30/19 $10,753 $11,417 07/31/19 $10,385 $11,272 08/31/19 $10,133 $10,980 09/30/19 $10,438 $11,294 10/31/19 $10,774 $11,700 11/30/19 $10,858 $11,832 12/31/19 $11,229 $12,217 01/31/20 $10,946 $11,961 02/29/20 $9,990 $10,880 03/31/20 $8,381 $9,428 04/30/20 $9,001 $10,037 05/31/20 $9,359 $10,474 06/30/20 $9,685 $10,831 07/31/20 $9,859 $11,083 08/31/20 $10,338 $11,653 09/30/20 $10,088 $11,350 10/31/20 $9,642 $10,897 11/30/20 $10,957 $12,586 12/31/20 $11,551 $13,171 01/31/21 $11,441 $13,031 02/28/21 $11,707 $13,323 03/31/21 $12,194 $13,630 04/30/21 $12,594 $14,040 05/31/21 $13,170 $14,498 06/30/21 $12,970 $14,334 07/31/21 $13,004 $14,442 08/31/21 $13,225 $14,697 09/30/21 $12,704 $14,271 10/31/21 $13,004 $14,622 11/30/21 $12,372 $13,941 12/31/21 $13,054 $14,655 01/31/22 $12,753 $13,947 02/28/22 $12,346 $13,700 03/31/22 $12,532 $13,788 04/30/22 $11,812 $12,896 05/31/22 $12,102 $12,993 06/30/22 $10,708 $11,787 07/31/22 $11,243 $12,375 08/31/22 $10,650 $11,787 09/30/22 $9,535 $10,684 10/31/22 $10,197 $11,259 11/30/22 $11,463 $12,527 12/31/22 $11,295 $12,537 01/31/23 $12,163 $13,552 02/28/23 $12,054 $13,269 03/31/23 $12,199 $13,598 04/30/23 $12,464 $13,982 05/31/23 $11,849 $13,391 06/30/23 $12,560 $14,000 07/31/23 $12,945 $14,453 08/31/23 $12,548 $13,899 09/30/23 $12,271 $13,424 10/31/23 $11,753 $12,880 11/30/23 $12,680 $14,076 12/31/23 $13,302 $14,824 01/31/24 $13,366 $14,909 02/29/24 $13,672 $15,182 03/31/24 $14,310 $15,681 04/30/24 $13,940 $15,279 05/31/24 $14,718 $15,871 06/30/24 $14,220 $15,615 07/31/24 $14,654 $16,073 08/31/24 $15,113 $16,596 |
| Average Annual Return [Table Text Block] | Name 1 Year 5 Years 10 Years SSIPX 20.44% 8.32% 4.22% MSCI EAFE Net Dividend Index 19.40% 8.61% 5.20% |
| AssetsNet | $ 139,639,104 |
| Holdings Count | Holding | 176 |
| Advisory Fees Paid, Amount | $ 644,803 |
| InvestmentCompanyPortfolioTurnover | 98% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics as of 8/31/2024 Statistic Value Total Net Assets $139,639,104 Number of Portfolio Holdings 176 Portfolio Turnover Rate 98% Total Advisory Fees Paid $644,803 |
| Holdings [Text Block] | Top Ten Countries Country % Value of Total Net Assets Japan 22.0% United Kingdom 10.4% Germany 9.5% France 9.0% United States 7.6% Australia 5.9% Switzerland 5.3% Netherlands 5.1% Italy 4.0% Spain 3.9% |
| Material Fund Change [Text Block] | |
| Accountant Change Statement [Text Block] | |
| C000143793 | |
| Shareholder Report [Line Items] | |
| Fund Name | State Street International Stock Selection Fund |
| Class Name | Class K |
| Trading Symbol | SSIQX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the State Street International Stock Selection Fund (the "Fund") for the period of September 1, 2023 to August 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf |
| Additional Information Phone Number | 1-800-647-7327 |
| Additional Information Website | www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf</span>" id="sjs-B69"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf</span> |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class K $83 0.75% |
| Expenses Paid, Amount | $ 83 |
| Expense Ratio, Percent | 0.75% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Value and Sentiment-based factors were the primary drivers of Fund performance during the reporting period relative to the Index. Both themes yielded positive returns as companies with lower valuation and good market sentiment outperformed their more expensive and unfavored peers. Stock selection in each of the Industrials, Consumer Discretionary and Health Care sectors was the largest positive contribution to Fund performance. At the regional level, stock selection was most successful in Europe and Asia Pacific ex Japan. |
| Performance Past Does Not Indicate Future [Text] | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future. The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption or sale of Fund shares. Updated performance information is available by calling 1-800-647-7327 or visiting our website at <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 700; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.ssga.com</span>.</span></p>" id="sjs-B74"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future. The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption or sale of Fund shares. Updated performance information is available by calling 1-800-647-7327 or visiting our website at <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 700; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.ssga.com</span>.</span></p> |
| Line Graph [Table Text Block] | SSIQX MSCI EAFE Net Dividend Index 08/31/14 $10,000 $10,000 09/30/14 $9,689 $9,616 10/31/14 $9,573 $9,476 11/30/14 $9,751 $9,605 12/31/14 $9,392 $9,272 01/31/15 $9,518 $9,317 02/28/15 $10,058 $9,874 03/31/15 $9,923 $9,724 04/30/15 $10,309 $10,122 05/31/15 $10,399 $10,070 06/30/15 $10,093 $9,784 07/31/15 $10,210 $9,988 08/31/15 $9,599 $9,253 09/30/15 $9,194 $8,783 10/31/15 $9,815 $9,470 11/30/15 $9,707 $9,322 12/31/15 $9,494 $9,197 01/31/16 $8,911 $8,532 02/29/16 $8,642 $8,375 03/31/16 $9,124 $8,920 04/30/16 $9,420 $9,179 05/31/16 $9,392 $9,095 06/30/16 $8,976 $8,790 07/31/16 $9,383 $9,235 08/31/16 $9,364 $9,242 09/30/16 $9,531 $9,355 10/31/16 $9,364 $9,164 11/30/16 $9,235 $8,982 12/31/16 $9,525 $9,289 01/31/17 $9,850 $9,558 02/28/17 $9,897 $9,695 03/31/17 $10,155 $9,962 04/30/17 $10,469 $10,215 05/31/17 $10,879 $10,590 06/30/17 $10,918 $10,571 07/31/17 $11,232 $10,876 08/31/17 $11,261 $10,872 09/30/17 $11,480 $11,143 10/31/17 $11,604 $11,312 11/30/17 $11,556 $11,431 12/31/17 $11,679 $11,614 01/31/18 $12,075 $12,197 02/28/18 $11,500 $11,646 03/31/18 $11,351 $11,436 04/30/18 $11,470 $11,697 05/31/18 $11,223 $11,434 06/30/18 $10,975 $11,295 07/31/18 $11,223 $11,573 08/31/18 $10,945 $11,349 09/30/18 $11,074 $11,448 10/31/18 $10,271 $10,537 11/30/18 $10,063 $10,523 12/31/18 $9,642 $10,012 01/31/19 $10,370 $10,670 02/28/19 $10,592 $10,942 03/31/19 $10,687 $11,011 04/30/19 $10,813 $11,321 05/31/19 $10,202 $10,777 06/30/19 $10,803 $11,417 07/31/19 $10,434 $11,272 08/31/19 $10,180 $10,980 09/30/19 $10,486 $11,294 10/31/19 $10,824 $11,700 11/30/19 $10,908 $11,832 12/31/19 $11,291 $12,217 01/31/20 $10,996 $11,961 02/29/20 $10,045 $10,880 03/31/20 $8,427 $9,428 04/30/20 $9,050 $10,037 05/31/20 $9,411 $10,474 06/30/20 $9,750 $10,831 07/31/20 $9,925 $11,083 08/31/20 $10,406 $11,653 09/30/20 $10,154 $11,350 10/31/20 $9,706 $10,897 11/30/20 $11,029 $12,586 12/31/20 $11,631 $13,171 01/31/21 $11,520 $13,031 02/28/21 $11,776 $13,323 03/31/21 $12,279 $13,630 04/30/21 $12,681 $14,040 05/31/21 $13,261 $14,498 06/30/21 $13,060 $14,334 07/31/21 $13,094 $14,442 08/31/21 $13,317 $14,697 09/30/21 $12,803 $14,271 10/31/21 $13,094 $14,622 11/30/21 $12,457 $13,941 12/31/21 $13,153 $14,655 01/31/22 $12,849 $13,947 02/28/22 $12,439 $13,700 03/31/22 $12,615 $13,788 04/30/22 $11,901 $12,896 05/31/22 $12,194 $12,993 06/30/22 $10,789 $11,787 07/31/22 $11,328 $12,375 08/31/22 $10,731 $11,787 09/30/22 $9,608 $10,684 10/31/22 $10,275 $11,259 11/30/22 $11,550 $12,527 12/31/22 $11,389 $12,537 01/31/23 $12,263 $13,552 02/28/23 $12,154 $13,269 03/31/23 $12,299 $13,598 04/30/23 $12,567 $13,982 05/31/23 $11,947 $13,391 06/30/23 $12,664 $14,000 07/31/23 $13,052 $14,453 08/31/23 $12,664 $13,899 09/30/23 $12,384 $13,424 10/31/23 $11,850 $12,880 11/30/23 $12,797 $14,076 12/31/23 $13,426 $14,824 01/31/24 $13,490 $14,909 02/29/24 $13,799 $15,182 03/31/24 $14,443 $15,681 04/30/24 $14,069 $15,279 05/31/24 $14,855 $15,871 06/30/24 $14,353 $15,615 07/31/24 $14,803 $16,073 08/31/24 $15,254 $16,596 |
| Average Annual Return [Table Text Block] | Name 1 Year 5 Years 10 Years SSIQX 20.45% 8.42% 4.31% MSCI EAFE Net Dividend Index 19.40% 8.61% 5.20% |
| AssetsNet | $ 139,639,104 |
| Holdings Count | Holding | 176 |
| Advisory Fees Paid, Amount | $ 644,803 |
| InvestmentCompanyPortfolioTurnover | 98% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics as of 8/31/2024 Statistic Value Total Net Assets $139,639,104 Number of Portfolio Holdings 176 Portfolio Turnover Rate 98% Total Advisory Fees Paid $644,803 |
| Holdings [Text Block] | Top Ten Countries Country % Value of Total Net Assets Japan 22.0% United Kingdom 10.4% Germany 9.5% France 9.0% United States 7.6% Australia 5.9% Switzerland 5.3% Netherlands 5.1% Italy 4.0% Spain 3.9% |
| Material Fund Change [Text Block] | |
| Accountant Change Statement [Text Block] | |
| C000014139 | |
| Shareholder Report [Line Items] | |
| Fund Name | State Street International Stock Selection Fund |
| Class Name | Class N |
| Trading Symbol | SSAIX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the State Street International Stock Selection Fund (the "Fund") for the period of September 1, 2023 to August 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf |
| Additional Information Phone Number | 1-800-647-7327 |
| Additional Information Website | www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf</span>" id="sjs-B94"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf</span> |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class N $110 1.00% |
| Expenses Paid, Amount | $ 110 |
| Expense Ratio, Percent | 1% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Value and Sentiment-based factors were the primary drivers of Fund performance during the reporting period relative to the Index. Both themes yielded positive returns as companies with lower valuation and good market sentiment outperformed their more expensive and unfavored peers. Stock selection in each of the Industrials, Consumer Discretionary and Health Care sectors was the largest positive contribution to Fund performance. At the regional level, stock selection was most successful in Europe and Asia Pacific ex Japan. |
| Performance Past Does Not Indicate Future [Text] | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future. The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption or sale of Fund shares. Updated performance information is available by calling 1-800-647-7327 or visiting our website at <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 700; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.ssga.com</span>.</span></p>" id="sjs-B99"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future. The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption or sale of Fund shares. Updated performance information is available by calling 1-800-647-7327 or visiting our website at <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 700; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.ssga.com</span>.</span></p> |
| Line Graph [Table Text Block] | SSAIX MSCI EAFE Net Dividend Index 08/31/14 $10,000 $10,000 09/30/14 $9,680 $9,616 10/31/14 $9,564 $9,476 11/30/14 $9,742 $9,605 12/31/14 $9,381 $9,272 01/31/15 $9,497 $9,317 02/28/15 $10,037 $9,874 03/31/15 $9,902 $9,724 04/30/15 $10,288 $10,122 05/31/15 $10,369 $10,070 06/30/15 $10,063 $9,784 07/31/15 $10,180 $9,988 08/31/15 $9,569 $9,253 09/30/15 $9,165 $8,783 10/31/15 $9,776 $9,470 11/30/15 $9,668 $9,322 12/31/15 $9,458 $9,197 01/31/16 $8,877 $8,532 02/29/16 $8,610 $8,375 03/31/16 $9,098 $8,920 04/30/16 $9,393 $9,179 05/31/16 $9,356 $9,095 06/30/16 $8,942 $8,790 07/31/16 $9,347 $9,235 08/31/16 $9,319 $9,242 09/30/16 $9,485 $9,355 10/31/16 $9,319 $9,164 11/30/16 $9,190 $8,982 12/31/16 $9,482 $9,289 01/31/17 $9,804 $9,558 02/28/17 $9,842 $9,695 03/31/17 $10,097 $9,962 04/30/17 $10,401 $10,215 05/31/17 $10,808 $10,590 06/30/17 $10,855 $10,571 07/31/17 $11,158 $10,876 08/31/17 $11,187 $10,872 09/30/17 $11,395 $11,143 10/31/17 $11,528 $11,312 11/30/17 $11,480 $11,431 12/31/17 $11,591 $11,614 01/31/18 $11,984 $12,197 02/28/18 $11,414 $11,646 03/31/18 $11,257 $11,436 04/30/18 $11,375 $11,697 05/31/18 $11,130 $11,434 06/30/18 $10,874 $11,295 07/31/18 $11,130 $11,573 08/31/18 $10,845 $11,349 09/30/18 $10,972 $11,448 10/31/18 $10,177 $10,537 11/30/18 $9,961 $10,523 12/31/18 $9,544 $10,012 01/31/19 $10,263 $10,670 02/28/19 $10,482 $10,942 03/31/19 $10,565 $11,011 04/30/19 $10,700 $11,321 05/31/19 $10,086 $10,777 06/30/19 $10,680 $11,417 07/31/19 $10,315 $11,272 08/31/19 $10,065 $10,980 09/30/19 $10,357 $11,294 10/31/19 $10,700 $11,700 11/30/19 $10,784 $11,832 12/31/19 $11,143 $12,217 01/31/20 $10,863 $11,961 02/29/20 $9,915 $10,880 03/31/20 $8,322 $9,428 04/30/20 $8,925 $10,037 05/31/20 $9,291 $10,474 06/30/20 $9,614 $10,831 07/31/20 $9,786 $11,083 08/31/20 $10,260 $11,653 09/30/20 $10,012 $11,350 10/31/20 $9,560 $10,897 11/30/20 $10,863 $12,586 12/31/20 $11,461 $13,171 01/31/21 $11,351 $13,031 02/28/21 $11,603 $13,323 03/31/21 $12,097 $13,630 04/30/21 $12,481 $14,040 05/31/21 $13,051 $14,498 06/30/21 $12,854 $14,334 07/31/21 $12,876 $14,442 08/31/21 $13,095 $14,697 09/30/21 $12,590 $14,271 10/31/21 $12,876 $14,622 11/30/21 $12,251 $13,941 12/31/21 $12,924 $14,655 01/31/22 $12,625 $13,947 02/28/22 $12,224 $13,700 03/31/22 $12,396 $13,788 04/30/22 $11,685 $12,896 05/31/22 $11,972 $12,993 06/30/22 $10,584 $11,787 07/31/22 $11,112 $12,375 08/31/22 $10,527 $11,787 09/30/22 $9,426 $10,684 10/31/22 $10,080 $11,259 11/30/22 $11,330 $12,527 12/31/22 $11,165 $12,537 01/31/23 $12,020 $13,552 02/28/23 $11,901 $13,269 03/31/23 $12,043 $13,598 04/30/23 $12,316 $13,982 05/31/23 $11,699 $13,391 06/30/23 $12,399 $14,000 07/31/23 $12,779 $14,453 08/31/23 $12,399 $13,899 09/30/23 $12,115 $13,424 10/31/23 $11,593 $12,880 11/30/23 $12,506 $14,076 12/31/23 $13,122 $14,824 01/31/24 $13,185 $14,909 02/29/24 $13,486 $15,182 03/31/24 $14,113 $15,681 04/30/24 $13,749 $15,279 05/31/24 $14,514 $15,871 06/30/24 $14,013 $15,615 07/31/24 $14,452 $16,073 08/31/24 $14,891 $16,596 |
| Average Annual Return [Table Text Block] | Name 1 Year 5 Years 10 Years SSAIX 20.09% 8.15% 4.06% MSCI EAFE Net Dividend Index 19.40% 8.61% 5.20% |
| AssetsNet | $ 139,639,104 |
| Holdings Count | Holding | 176 |
| Advisory Fees Paid, Amount | $ 644,803 |
| InvestmentCompanyPortfolioTurnover | 98% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics as of 8/31/2024 Statistic Value Total Net Assets $139,639,104 Number of Portfolio Holdings 176 Portfolio Turnover Rate 98% Total Advisory Fees Paid $644,803 |
| Holdings [Text Block] | Top Ten Countries Country % Value of Total Net Assets Japan 22.0% United Kingdom 10.4% Germany 9.5% France 9.0% United States 7.6% Australia 5.9% Switzerland 5.3% Netherlands 5.1% Italy 4.0% Spain 3.9% |
| Material Fund Change [Text Block] | |
| Accountant Change Statement [Text Block] | |
| C000014159 | |
| Shareholder Report [Line Items] | |
| Fund Name | State Street S&P 500 Index Fund |
| Class Name | Class N |
| Trading Symbol | SVSPX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the State Street S&P 500 Index Fund (the "Fund") for the period of September 1, 2023 to August 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf |
| Additional Information Phone Number | 1-800-647-7327 |
| Additional Information Website | www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf</span>" id="sjs-B119"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf</span> |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class N $18 0.16% |
| Expenses Paid, Amount | $ 18 |
| Expense Ratio, Percent | 0.16% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? All but three months posted positive returns over the reporting period. US stocks rallied in Q4 of 2023, supported by prospects of rate cuts in 2024. Most sectors performed well over the quarter, except for energy, which was dragged down by weak crude prices over the quarter. US equities rallied for a second straight quarter in Q1 2024. At 10.4%, the S&P 500 Index posted its biggest first-quarter gain since 2019 and its fifth gain in the last six quarters. Within sectors, communications services fared the best. The A.I. theme was one of the key tailwinds in Q1 2024, helping to drive select big tech and momentum factor outperformance. The S&P 500 Index returned a 4.2% for Q2 of 2024. There was a tough start to the quarter in April, but the momentum changed in the middle of the month due to a strong jobs report, ending up positive in May and June. The S&P 500 ended July above 5,500, reflecting a gain of 1.2% over the month. US equity markets gained in August, with the S&P 500 rising 2.4% and only consumer discretionary and energy being in the red. The Fund used futures in order to expose cash and dividends to the market during the reporting period. The Fund’s use of futures detracted from the Fund’s performance relative to the Index. |
| Performance Past Does Not Indicate Future [Text] | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future. The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption or sale of Fund shares. Updated performance information is available by calling 1-800-647-7327 or visiting our website at <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 700; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.ssga.com</span>.</span></p>" id="sjs-B124"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future. The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption or sale of Fund shares. Updated performance information is available by calling 1-800-647-7327 or visiting our website at <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 700; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.ssga.com</span>.</span></p> |
| Line Graph [Table Text Block] | SVSPX S&P 500 Index 08/31/14 $10,000 $10,000 09/30/14 $9,860 $9,860 10/31/14 $10,097 $10,101 11/30/14 $10,368 $10,372 12/31/14 $10,341 $10,346 01/31/15 $10,030 $10,036 02/28/15 $10,604 $10,612 03/31/15 $10,434 $10,444 04/30/15 $10,533 $10,545 05/31/15 $10,667 $10,680 06/30/15 $10,458 $10,474 07/31/15 $10,678 $10,693 08/31/15 $10,036 $10,048 09/30/15 $9,786 $9,799 10/31/15 $10,612 $10,626 11/30/15 $10,641 $10,657 12/31/15 $10,473 $10,489 01/31/16 $9,952 $9,969 02/29/16 $9,935 $9,955 03/31/16 $10,609 $10,631 04/30/16 $10,652 $10,672 05/31/16 $10,841 $10,864 06/30/16 $10,865 $10,892 07/31/16 $11,265 $11,293 08/31/16 $11,278 $11,309 09/30/16 $11,279 $11,311 10/31/16 $11,071 $11,105 11/30/16 $11,479 $11,516 12/31/16 $11,706 $11,744 01/31/17 $11,924 $11,967 02/28/17 $12,398 $12,442 03/31/17 $12,411 $12,456 04/30/17 $12,538 $12,584 05/31/17 $12,712 $12,761 06/30/17 $12,791 $12,841 07/31/17 $13,049 $13,105 08/31/17 $13,089 $13,145 09/30/17 $13,356 $13,416 10/31/17 $13,667 $13,729 11/30/17 $14,087 $14,150 12/31/17 $14,243 $14,308 01/31/18 $15,054 $15,127 02/28/18 $14,492 $14,569 03/31/18 $14,119 $14,199 04/30/18 $14,172 $14,254 05/31/18 $14,512 $14,597 06/30/18 $14,595 $14,687 07/31/18 $15,139 $15,233 08/31/18 $15,630 $15,730 09/30/18 $15,717 $15,819 10/31/18 $14,642 $14,738 11/30/18 $14,935 $15,038 12/31/18 $13,585 $13,680 01/31/19 $14,673 $14,777 02/28/19 $15,140 $15,251 03/31/19 $15,435 $15,547 04/30/19 $16,056 $16,177 05/31/19 $15,033 $15,149 06/30/19 $16,092 $16,217 07/31/19 $16,322 $16,450 08/31/19 $16,053 $16,189 09/30/19 $16,353 $16,492 10/31/19 $16,706 $16,849 11/30/19 $17,307 $17,461 12/31/19 $17,832 $17,988 01/31/20 $17,818 $17,981 02/29/20 $16,347 $16,501 03/31/20 $14,364 $14,463 04/30/20 $16,203 $16,317 05/31/20 $16,975 $17,094 06/30/20 $17,320 $17,434 07/31/20 $18,296 $18,417 08/31/20 $19,608 $19,740 09/30/20 $18,857 $18,990 10/31/20 $18,356 $18,485 11/30/20 $20,368 $20,509 12/31/20 $21,147 $21,297 01/31/21 $20,929 $21,082 02/28/21 $21,506 $21,664 03/31/21 $22,449 $22,612 04/30/21 $23,646 $23,819 05/31/21 $23,808 $23,986 06/30/21 $24,359 $24,546 07/31/21 $24,933 $25,129 08/31/21 $25,689 $25,893 09/30/21 $24,493 $24,688 10/31/21 $26,207 $26,418 11/30/21 $26,018 $26,235 12/31/21 $27,183 $27,411 01/31/22 $25,771 $25,992 02/28/22 $24,998 $25,214 03/31/22 $25,924 $26,150 04/30/22 $23,655 $23,870 05/31/22 $23,698 $23,914 06/30/22 $21,740 $21,940 07/31/22 $23,745 $23,963 08/31/22 $22,771 $22,986 09/30/22 $20,669 $20,869 10/31/22 $22,339 $22,558 11/30/22 $23,586 $23,819 12/31/22 $22,223 $22,446 01/31/23 $23,619 $23,857 02/28/23 $23,041 $23,275 03/31/23 $23,884 $24,129 04/30/23 $24,253 $24,506 05/31/23 $24,356 $24,612 06/30/23 $25,965 $26,239 07/31/23 $26,799 $27,082 08/31/23 $26,370 $26,650 09/30/23 $25,107 $25,380 10/31/23 $24,572 $24,846 11/30/23 $26,813 $27,115 12/31/23 $28,033 $28,347 01/31/24 $28,500 $28,824 02/29/24 $30,017 $30,363 03/31/24 $30,980 $31,339 04/30/24 $29,710 $30,059 05/31/24 $31,181 $31,550 06/30/24 $32,296 $32,682 07/31/24 $32,682 $33,080 08/31/24 $33,469 $33,882 |
| Average Annual Return [Table Text Block] | Name 1 Year 5 Years 10 Years SVSPX 26.92% 15.83% 12.84% S&P 500 Index 27.14% 15.92% 12.98% |
| AssetsNet | $ 1,517,775,810 |
| Holdings Count | Holding | 506 |
| Advisory Fees Paid, Amount | $ 175,195 |
| InvestmentCompanyPortfolioTurnover | 2% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics as of 8/31/2024 Statistic Value Total Net Assets $1,517,775,810 Number of Portfolio Holdings 506 Portfolio Turnover Rate 2% Total Advisory Fees Paid $175,195 |
| Holdings [Text Block] | Top Ten Holdings Holdings % Value of Total Net Assets Apple, Inc. 6.9% Microsoft Corp. 6.5% NVIDIA Corp. 6.1% Amazon.com, Inc. 3.4% Meta Platforms, Inc., A 2.4% Alphabet, Inc., A 2.0% Berkshire Hathaway, Inc., B 1.8% Alphabet, Inc., C 1.7% Eli Lilly & Co. 1.6% Broadcom, Inc. 1.5% |
| Material Fund Change [Text Block] | |
| Accountant Change Statement [Text Block] |
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Aug. 31, 2024 | Jul. 31, 2024 | Jun. 30, 2024 | May 31, 2024 | Apr. 30, 2024 | Mar. 31, 2024 | Feb. 29, 2024 | Jan. 31, 2024 | Dec. 31, 2023 | Nov. 30, 2023 | Oct. 31, 2023 | Sep. 30, 2023 | Aug. 31, 2023 | Jul. 31, 2023 | Jun. 30, 2023 | May 31, 2023 | Apr. 30, 2023 | Mar. 31, 2023 | Feb. 28, 2023 | Jan. 31, 2023 | Dec. 31, 2022 | Nov. 30, 2022 | Oct. 31, 2022 | Sep. 30, 2022 | Aug. 31, 2022 | Jul. 31, 2022 | Jun. 30, 2022 | May 31, 2022 | Apr. 30, 2022 | Mar. 31, 2022 | Feb. 28, 2022 | Jan. 31, 2022 | Dec. 31, 2021 | Nov. 30, 2021 | Oct. 31, 2021 | Sep. 30, 2021 | Aug. 31, 2021 | Jul. 31, 2021 | Jun. 30, 2021 | May 31, 2021 | Apr. 30, 2021 | Mar. 31, 2021 | Feb. 28, 2021 | Jan. 31, 2021 | Dec. 31, 2020 | Nov. 30, 2020 | Oct. 31, 2020 | Sep. 30, 2020 | Aug. 31, 2020 | Jul. 31, 2020 | Jun. 30, 2020 | May 31, 2020 | Apr. 30, 2020 | Mar. 31, 2020 | Feb. 29, 2020 | Jan. 31, 2020 | Dec. 31, 2019 | Nov. 30, 2019 | Oct. 31, 2019 | Sep. 30, 2019 | Aug. 31, 2019 | Jul. 31, 2019 | Jun. 30, 2019 | May 31, 2019 | Apr. 30, 2019 | Mar. 31, 2019 | Feb. 28, 2019 | Jan. 31, 2019 | Dec. 31, 2018 | Nov. 30, 2018 | Oct. 31, 2018 | Sep. 30, 2018 | Aug. 31, 2018 | Jul. 31, 2018 | Jun. 30, 2018 | May 31, 2018 | Apr. 30, 2018 | Mar. 31, 2018 | Feb. 28, 2018 | Jan. 31, 2018 | Dec. 31, 2017 | Nov. 30, 2017 | Oct. 31, 2017 | Sep. 30, 2017 | Aug. 31, 2017 | Jul. 31, 2017 | Jun. 30, 2017 | May 31, 2017 | Apr. 30, 2017 | Mar. 31, 2017 | Feb. 28, 2017 | Jan. 31, 2017 | Dec. 31, 2016 | Nov. 30, 2016 | Oct. 31, 2016 | Sep. 30, 2016 | Aug. 31, 2016 | Jul. 31, 2016 | Jun. 30, 2016 | May 31, 2016 | Apr. 30, 2016 | Mar. 31, 2016 | Feb. 29, 2016 | Jan. 31, 2016 | Dec. 31, 2015 | Nov. 30, 2015 | Oct. 31, 2015 | Sep. 30, 2015 | Aug. 31, 2015 | Jul. 31, 2015 | Jun. 30, 2015 | May 31, 2015 | Apr. 30, 2015 | Mar. 31, 2015 | Feb. 28, 2015 | Jan. 31, 2015 | Dec. 31, 2014 | Nov. 30, 2014 | Oct. 31, 2014 | Sep. 30, 2014 | Aug. 31, 2014 | |
| C000143790 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | SSILX with load | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 13,492 | $ 13,095 | $ 12,708 | $ 13,150 | $ 12,465 | $ 12,797 | $ 12,233 | $ 11,968 | $ 11,913 | $ 11,362 | $ 10,530 | $ 11,006 | $ 11,254 | $ 11,730 | $ 11,384 | $ 10,746 | $ 11,308 | $ 11,070 | $ 10,941 | $ 11,179 | $ 10,389 | $ 10,546 | $ 9,394 | $ 8,780 | $ 9,814 | $ 10,352 | $ 9,868 | $ 11,160 | $ 10,891 | $ 11,559 | $ 11,397 | $ 11,774 | $ 12,054 | $ 11,435 | $ 12,024 | $ 11,745 | $ 12,230 | $ 12,034 | $ 12,013 | $ 12,189 | $ 11,673 | $ 11,301 | $ 10,846 | $ 10,619 | $ 10,722 | $ 10,174 | $ 8,946 | $ 9,372 | $ 9,606 | $ 9,159 | $ 9,007 | $ 8,702 | $ 8,367 | $ 7,798 | $ 9,301 | $ 10,184 | $ 10,448 | $ 10,110 | $ 10,031 | $ 9,716 | $ 9,441 | $ 9,687 | $ 10,031 | $ 9,470 | $ 10,051 | $ 9,923 | $ 9,844 | $ 9,647 | $ 8,968 | $ 9,364 | $ 9,568 | $ 10,322 | $ 10,201 | $ 10,471 | $ 10,229 | $ 10,471 | $ 10,713 | $ 10,602 | $ 10,751 | $ 11,300 | $ 10,937 | $ 10,824 | $ 10,869 | $ 10,743 | $ 10,555 | $ 10,519 | $ 10,232 | $ 10,196 | $ 9,810 | $ 9,523 | $ 9,280 | $ 9,245 | $ 8,939 | $ 8,677 | $ 8,799 | $ 8,957 | $ 8,799 | $ 8,825 | $ 8,449 | $ 8,834 | $ 8,869 | $ 8,598 | $ 8,134 | $ 8,396 | $ 8,939 | $ 9,146 | $ 9,256 | $ 8,677 | $ 9,061 | $ 9,640 | $ 9,529 | $ 9,818 | $ 9,742 | $ 9,384 | $ 9,512 | $ 9,001 | $ 8,890 | $ 9,232 | $ 9,072 | $ 9,181 | $ 9,477 |
| C000143792 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | SSIPX | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 15,113 | 14,654 | 14,220 | 14,718 | 13,940 | 14,310 | 13,672 | 13,366 | 13,302 | 12,680 | 11,753 | 12,271 | 12,548 | 12,945 | 12,560 | 11,849 | 12,464 | 12,199 | 12,054 | 12,163 | 11,295 | 11,463 | 10,197 | 9,535 | 10,650 | 11,243 | 10,708 | 12,102 | 11,812 | 12,532 | 12,346 | 12,753 | 13,054 | 12,372 | 13,004 | 12,704 | 13,225 | 13,004 | 12,970 | 13,170 | 12,594 | 12,194 | 11,707 | 11,441 | 11,551 | 10,957 | 9,642 | 10,088 | 10,338 | 9,859 | 9,685 | 9,359 | 9,001 | 8,381 | 9,990 | 10,946 | 11,229 | 10,858 | 10,774 | 10,438 | 10,133 | 10,385 | 10,753 | 10,154 | 10,763 | 10,637 | 10,543 | 10,322 | 9,598 | 10,020 | 10,228 | 11,027 | 10,899 | 11,185 | 10,929 | 11,175 | 11,422 | 11,304 | 11,452 | 12,024 | 11,629 | 11,512 | 11,559 | 11,426 | 11,217 | 11,189 | 10,875 | 10,837 | 10,429 | 10,115 | 9,859 | 9,811 | 9,489 | 9,201 | 9,339 | 9,496 | 9,330 | 9,358 | 8,951 | 9,367 | 9,395 | 9,099 | 8,619 | 8,887 | 9,469 | 9,678 | 9,786 | 9,174 | 9,579 | 10,182 | 10,074 | 10,380 | 10,299 | 9,912 | 10,047 | 9,507 | 9,381 | 9,742 | 9,564 | 9,680 | 10,000 |
| C000143793 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | SSIQX | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 15,254 | 14,803 | 14,353 | 14,855 | 14,069 | 14,443 | 13,799 | 13,490 | 13,426 | 12,797 | 11,850 | 12,384 | 12,664 | 13,052 | 12,664 | 11,947 | 12,567 | 12,299 | 12,154 | 12,263 | 11,389 | 11,550 | 10,275 | 9,608 | 10,731 | 11,328 | 10,789 | 12,194 | 11,901 | 12,615 | 12,439 | 12,849 | 13,153 | 12,457 | 13,094 | 12,803 | 13,317 | 13,094 | 13,060 | 13,261 | 12,681 | 12,279 | 11,776 | 11,520 | 11,631 | 11,029 | 9,706 | 10,154 | 10,406 | 9,925 | 9,750 | 9,411 | 9,050 | 8,427 | 10,045 | 10,996 | 11,291 | 10,908 | 10,824 | 10,486 | 10,180 | 10,434 | 10,803 | 10,202 | 10,813 | 10,687 | 10,592 | 10,370 | 9,642 | 10,063 | 10,271 | 11,074 | 10,945 | 11,223 | 10,975 | 11,223 | 11,470 | 11,351 | 11,500 | 12,075 | 11,679 | 11,556 | 11,604 | 11,480 | 11,261 | 11,232 | 10,918 | 10,879 | 10,469 | 10,155 | 9,897 | 9,850 | 9,525 | 9,235 | 9,364 | 9,531 | 9,364 | 9,383 | 8,976 | 9,392 | 9,420 | 9,124 | 8,642 | 8,911 | 9,494 | 9,707 | 9,815 | 9,194 | 9,599 | 10,210 | 10,093 | 10,399 | 10,309 | 9,923 | 10,058 | 9,518 | 9,392 | 9,751 | 9,573 | 9,689 | 10,000 |
| C000014139 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | SSAIX | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 14,891 | 14,452 | 14,013 | 14,514 | 13,749 | 14,113 | 13,486 | 13,185 | 13,122 | 12,506 | 11,593 | 12,115 | 12,399 | 12,779 | 12,399 | 11,699 | 12,316 | 12,043 | 11,901 | 12,020 | 11,165 | 11,330 | 10,080 | 9,426 | 10,527 | 11,112 | 10,584 | 11,972 | 11,685 | 12,396 | 12,224 | 12,625 | 12,924 | 12,251 | 12,876 | 12,590 | 13,095 | 12,876 | 12,854 | 13,051 | 12,481 | 12,097 | 11,603 | 11,351 | 11,461 | 10,863 | 9,560 | 10,012 | 10,260 | 9,786 | 9,614 | 9,291 | 8,925 | 8,322 | 9,915 | 10,863 | 11,143 | 10,784 | 10,700 | 10,357 | 10,065 | 10,315 | 10,680 | 10,086 | 10,700 | 10,565 | 10,482 | 10,263 | 9,544 | 9,961 | 10,177 | 10,972 | 10,845 | 11,130 | 10,874 | 11,130 | 11,375 | 11,257 | 11,414 | 11,984 | 11,591 | 11,480 | 11,528 | 11,395 | 11,187 | 11,158 | 10,855 | 10,808 | 10,401 | 10,097 | 9,842 | 9,804 | 9,482 | 9,190 | 9,319 | 9,485 | 9,319 | 9,347 | 8,942 | 9,356 | 9,393 | 9,098 | 8,610 | 8,877 | 9,458 | 9,668 | 9,776 | 9,165 | 9,569 | 10,180 | 10,063 | 10,369 | 10,288 | 9,902 | 10,037 | 9,497 | 9,381 | 9,742 | 9,564 | 9,680 | 10,000 |
| C000014159 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | SVSPX | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 33,469 | 32,682 | 32,296 | 31,181 | 29,710 | 30,980 | 30,017 | 28,500 | 28,033 | 26,813 | 24,572 | 25,107 | 26,370 | 26,799 | 25,965 | 24,356 | 24,253 | 23,884 | 23,041 | 23,619 | 22,223 | 23,586 | 22,339 | 20,669 | 22,771 | 23,745 | 21,740 | 23,698 | 23,655 | 25,924 | 24,998 | 25,771 | 27,183 | 26,018 | 26,207 | 24,493 | 25,689 | 24,933 | 24,359 | 23,808 | 23,646 | 22,449 | 21,506 | 20,929 | 21,147 | 20,368 | 18,356 | 18,857 | 19,608 | 18,296 | 17,320 | 16,975 | 16,203 | 14,364 | 16,347 | 17,818 | 17,832 | 17,307 | 16,706 | 16,353 | 16,053 | 16,322 | 16,092 | 15,033 | 16,056 | 15,435 | 15,140 | 14,673 | 13,585 | 14,935 | 14,642 | 15,717 | 15,630 | 15,139 | 14,595 | 14,512 | 14,172 | 14,119 | 14,492 | 15,054 | 14,243 | 14,087 | 13,667 | 13,356 | 13,089 | 13,049 | 12,791 | 12,712 | 12,538 | 12,411 | 12,398 | 11,924 | 11,706 | 11,479 | 11,071 | 11,279 | 11,278 | 11,265 | 10,865 | 10,841 | 10,652 | 10,609 | 9,935 | 9,952 | 10,473 | 10,641 | 10,612 | 9,786 | 10,036 | 10,678 | 10,458 | 10,667 | 10,533 | 10,434 | 10,604 | 10,030 | 10,341 | 10,368 | 10,097 | 9,860 | 10,000 |
| SSGA Index: MSCI EAFE Net Dividend Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | MSCI EAFE Net Dividend Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 16,596 | 16,073 | 15,615 | 15,871 | 15,279 | 15,681 | 15,182 | 14,909 | 14,824 | 14,076 | 12,880 | 13,424 | 13,899 | 14,453 | 14,000 | 13,391 | 13,982 | 13,598 | 13,269 | 13,552 | 12,537 | 12,527 | 11,259 | 10,684 | 11,787 | 12,375 | 11,787 | 12,993 | 12,896 | 13,788 | 13,700 | 13,947 | 14,655 | 13,941 | 14,622 | 14,271 | 14,697 | 14,442 | 14,334 | 14,498 | 14,040 | 13,630 | 13,323 | 13,031 | 13,171 | 12,586 | 10,897 | 11,350 | 11,653 | 11,083 | 10,831 | 10,474 | 10,037 | 9,428 | 10,880 | 11,961 | 12,217 | 11,832 | 11,700 | 11,294 | 10,980 | 11,272 | 11,417 | 10,777 | 11,321 | 11,011 | 10,942 | 10,670 | 10,012 | 10,523 | 10,537 | 11,448 | 11,349 | 11,573 | 11,295 | 11,434 | 11,697 | 11,436 | 11,646 | 12,197 | 11,614 | 11,431 | 11,312 | 11,143 | 10,872 | 10,876 | 10,571 | 10,590 | 10,215 | 9,962 | 9,695 | 9,558 | 9,289 | 8,982 | 9,164 | 9,355 | 9,242 | 9,235 | 8,790 | 9,095 | 9,179 | 8,920 | 8,375 | 8,532 | 9,197 | 9,322 | 9,470 | 8,783 | 9,253 | 9,988 | 9,784 | 10,070 | 10,122 | 9,724 | 9,874 | 9,317 | 9,272 | 9,605 | 9,476 | 9,616 | 10,000 |
| SSGA Index: MSCI EAFE Net Dividend Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | MSCI EAFE Net Dividend Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 16,596 | 16,073 | 15,615 | 15,871 | 15,279 | 15,681 | 15,182 | 14,909 | 14,824 | 14,076 | 12,880 | 13,424 | 13,899 | 14,453 | 14,000 | 13,391 | 13,982 | 13,598 | 13,269 | 13,552 | 12,537 | 12,527 | 11,259 | 10,684 | 11,787 | 12,375 | 11,787 | 12,993 | 12,896 | 13,788 | 13,700 | 13,947 | 14,655 | 13,941 | 14,622 | 14,271 | 14,697 | 14,442 | 14,334 | 14,498 | 14,040 | 13,630 | 13,323 | 13,031 | 13,171 | 12,586 | 10,897 | 11,350 | 11,653 | 11,083 | 10,831 | 10,474 | 10,037 | 9,428 | 10,880 | 11,961 | 12,217 | 11,832 | 11,700 | 11,294 | 10,980 | 11,272 | 11,417 | 10,777 | 11,321 | 11,011 | 10,942 | 10,670 | 10,012 | 10,523 | 10,537 | 11,448 | 11,349 | 11,573 | 11,295 | 11,434 | 11,697 | 11,436 | 11,646 | 12,197 | 11,614 | 11,431 | 11,312 | 11,143 | 10,872 | 10,876 | 10,571 | 10,590 | 10,215 | 9,962 | 9,695 | 9,558 | 9,289 | 8,982 | 9,164 | 9,355 | 9,242 | 9,235 | 8,790 | 9,095 | 9,179 | 8,920 | 8,375 | 8,532 | 9,197 | 9,322 | 9,470 | 8,783 | 9,253 | 9,988 | 9,784 | 10,070 | 10,122 | 9,724 | 9,874 | 9,317 | 9,272 | 9,605 | 9,476 | 9,616 | 10,000 |
| SSGA Index: MSCI EAFE Net Dividend Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | MSCI EAFE Net Dividend Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 16,596 | 16,073 | 15,615 | 15,871 | 15,279 | 15,681 | 15,182 | 14,909 | 14,824 | 14,076 | 12,880 | 13,424 | 13,899 | 14,453 | 14,000 | 13,391 | 13,982 | 13,598 | 13,269 | 13,552 | 12,537 | 12,527 | 11,259 | 10,684 | 11,787 | 12,375 | 11,787 | 12,993 | 12,896 | 13,788 | 13,700 | 13,947 | 14,655 | 13,941 | 14,622 | 14,271 | 14,697 | 14,442 | 14,334 | 14,498 | 14,040 | 13,630 | 13,323 | 13,031 | 13,171 | 12,586 | 10,897 | 11,350 | 11,653 | 11,083 | 10,831 | 10,474 | 10,037 | 9,428 | 10,880 | 11,961 | 12,217 | 11,832 | 11,700 | 11,294 | 10,980 | 11,272 | 11,417 | 10,777 | 11,321 | 11,011 | 10,942 | 10,670 | 10,012 | 10,523 | 10,537 | 11,448 | 11,349 | 11,573 | 11,295 | 11,434 | 11,697 | 11,436 | 11,646 | 12,197 | 11,614 | 11,431 | 11,312 | 11,143 | 10,872 | 10,876 | 10,571 | 10,590 | 10,215 | 9,962 | 9,695 | 9,558 | 9,289 | 8,982 | 9,164 | 9,355 | 9,242 | 9,235 | 8,790 | 9,095 | 9,179 | 8,920 | 8,375 | 8,532 | 9,197 | 9,322 | 9,470 | 8,783 | 9,253 | 9,988 | 9,784 | 10,070 | 10,122 | 9,724 | 9,874 | 9,317 | 9,272 | 9,605 | 9,476 | 9,616 | 10,000 |
| SSGA Index: MSCI EAFE Net Dividend Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | MSCI EAFE Net Dividend Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 16,596 | 16,073 | 15,615 | 15,871 | 15,279 | 15,681 | 15,182 | 14,909 | 14,824 | 14,076 | 12,880 | 13,424 | 13,899 | 14,453 | 14,000 | 13,391 | 13,982 | 13,598 | 13,269 | 13,552 | 12,537 | 12,527 | 11,259 | 10,684 | 11,787 | 12,375 | 11,787 | 12,993 | 12,896 | 13,788 | 13,700 | 13,947 | 14,655 | 13,941 | 14,622 | 14,271 | 14,697 | 14,442 | 14,334 | 14,498 | 14,040 | 13,630 | 13,323 | 13,031 | 13,171 | 12,586 | 10,897 | 11,350 | 11,653 | 11,083 | 10,831 | 10,474 | 10,037 | 9,428 | 10,880 | 11,961 | 12,217 | 11,832 | 11,700 | 11,294 | 10,980 | 11,272 | 11,417 | 10,777 | 11,321 | 11,011 | 10,942 | 10,670 | 10,012 | 10,523 | 10,537 | 11,448 | 11,349 | 11,573 | 11,295 | 11,434 | 11,697 | 11,436 | 11,646 | 12,197 | 11,614 | 11,431 | 11,312 | 11,143 | 10,872 | 10,876 | 10,571 | 10,590 | 10,215 | 9,962 | 9,695 | 9,558 | 9,289 | 8,982 | 9,164 | 9,355 | 9,242 | 9,235 | 8,790 | 9,095 | 9,179 | 8,920 | 8,375 | 8,532 | 9,197 | 9,322 | 9,470 | 8,783 | 9,253 | 9,988 | 9,784 | 10,070 | 10,122 | 9,724 | 9,874 | 9,317 | 9,272 | 9,605 | 9,476 | 9,616 | 10,000 |
| SSGA Index: S&P 500 Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | S&P 500 Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 33,882 | $ 33,080 | $ 32,682 | $ 31,550 | $ 30,059 | $ 31,339 | $ 30,363 | $ 28,824 | $ 28,347 | $ 27,115 | $ 24,846 | $ 25,380 | $ 26,650 | $ 27,082 | $ 26,239 | $ 24,612 | $ 24,506 | $ 24,129 | $ 23,275 | $ 23,857 | $ 22,446 | $ 23,819 | $ 22,558 | $ 20,869 | $ 22,986 | $ 23,963 | $ 21,940 | $ 23,914 | $ 23,870 | $ 26,150 | $ 25,214 | $ 25,992 | $ 27,411 | $ 26,235 | $ 26,418 | $ 24,688 | $ 25,893 | $ 25,129 | $ 24,546 | $ 23,986 | $ 23,819 | $ 22,612 | $ 21,664 | $ 21,082 | $ 21,297 | $ 20,509 | $ 18,485 | $ 18,990 | $ 19,740 | $ 18,417 | $ 17,434 | $ 17,094 | $ 16,317 | $ 14,463 | $ 16,501 | $ 17,981 | $ 17,988 | $ 17,461 | $ 16,849 | $ 16,492 | $ 16,189 | $ 16,450 | $ 16,217 | $ 15,149 | $ 16,177 | $ 15,547 | $ 15,251 | $ 14,777 | $ 13,680 | $ 15,038 | $ 14,738 | $ 15,819 | $ 15,730 | $ 15,233 | $ 14,687 | $ 14,597 | $ 14,254 | $ 14,199 | $ 14,569 | $ 15,127 | $ 14,308 | $ 14,150 | $ 13,729 | $ 13,416 | $ 13,145 | $ 13,105 | $ 12,841 | $ 12,761 | $ 12,584 | $ 12,456 | $ 12,442 | $ 11,967 | $ 11,744 | $ 11,516 | $ 11,105 | $ 11,311 | $ 11,309 | $ 11,293 | $ 10,892 | $ 10,864 | $ 10,672 | $ 10,631 | $ 9,955 | $ 9,969 | $ 10,489 | $ 10,657 | $ 10,626 | $ 9,799 | $ 10,048 | $ 10,693 | $ 10,474 | $ 10,680 | $ 10,545 | $ 10,444 | $ 10,612 | $ 10,036 | $ 10,346 | $ 10,372 | $ 10,101 | $ 9,860 | $ 10,000 |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended | 60 Months Ended | 120 Months Ended |
| Aug. 31, 2024 | Aug. 31, 2024 | Aug. 31, 2024 | |
| C000143790 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | SSILX with load | ||
| Average Annual Return, Percent | 13.56% | 6.25% | 3.04% |
| C000143792 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | SSIPX | ||
| C000143793 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | SSIQX | ||
| C000014139 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | SSAIX | ||
| C000014159 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | SVSPX | ||
| Without Sales Load [Member] | C000143790 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 19.89% | 7.40% | 3.60% |
| Without Sales Load [Member] | C000143792 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 20.44% | 8.32% | 4.22% |
| Without Sales Load [Member] | C000143793 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 20.45% | 8.42% | 4.31% |
| Without Sales Load [Member] | C000014139 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 20.09% | 8.15% | 4.06% |
| Without Sales Load [Member] | C000014159 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 26.92% | 15.83% | 12.84% |
| SSGA Index: MSCI EAFE Net Dividend Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | MSCI EAFE Net Dividend Index | ||
| Average Annual Return, Percent | 19.40% | 8.61% | 5.20% |
| SSGA Index: MSCI EAFE Net Dividend Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | MSCI EAFE Net Dividend Index | ||
| Average Annual Return, Percent | 19.40% | 8.61% | 5.20% |
| SSGA Index: MSCI EAFE Net Dividend Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | MSCI EAFE Net Dividend Index | ||
| Average Annual Return, Percent | 19.40% | 8.61% | 5.20% |
| SSGA Index: MSCI EAFE Net Dividend Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | MSCI EAFE Net Dividend Index | ||
| Average Annual Return, Percent | 19.40% | 8.61% | 5.20% |
| SSGA Index: S&P 500 Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | S&P 500 Index | ||
| Average Annual Return, Percent | 27.14% | 15.92% | 12.98% |
| Shareholder Report, Holdings (Details) | Aug. 31, 2024 |
| C000143790 | IndustryBanks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.60% |
| C000143790 | IndustryPharmaceuticals | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| C000143790 | IndustryTrading Companies & Distributors | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000143790 | IndustryOil, Gas & Consumable Fuels | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000143790 | IndustryMachinery | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| C000143790 | IndustryInsurance | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000143790 | IndustryAutomobile Components | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000143790 | IndustryMetals & Mining | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000143790 | IndustryConstruction Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| C000143790 | IndustryConsumer Staples Distribution | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000143790 | Japan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22% |
| C000143790 | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.40% |
| C000143790 | Germany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| C000143790 | France | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000143790 | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000143790 | Australia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000143790 | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000143790 | Netherlands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| C000143790 | Italy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000143790 | Spain | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000143792 | IndustryBanks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.60% |
| C000143792 | IndustryPharmaceuticals | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| C000143792 | IndustryTrading Companies & Distributors | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000143792 | IndustryOil, Gas & Consumable Fuels | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000143792 | IndustryMachinery | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| C000143792 | IndustryInsurance | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000143792 | IndustryAutomobile Components | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000143792 | IndustryMetals & Mining | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000143792 | IndustryConstruction Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| C000143792 | IndustryConsumer Staples Distribution | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000143792 | Japan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22% |
| C000143792 | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.40% |
| C000143792 | Germany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| C000143792 | France | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000143792 | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000143792 | Australia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000143792 | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000143792 | Netherlands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| C000143792 | Italy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000143792 | Spain | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000143793 | IndustryBanks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.60% |
| C000143793 | IndustryPharmaceuticals | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| C000143793 | IndustryTrading Companies & Distributors | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000143793 | IndustryOil, Gas & Consumable Fuels | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000143793 | IndustryMachinery | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| C000143793 | IndustryInsurance | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000143793 | IndustryAutomobile Components | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000143793 | IndustryMetals & Mining | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000143793 | IndustryConstruction Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| C000143793 | IndustryConsumer Staples Distribution | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000143793 | Japan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22% |
| C000143793 | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.40% |
| C000143793 | Germany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| C000143793 | France | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000143793 | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000143793 | Australia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000143793 | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000143793 | Netherlands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| C000143793 | Italy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000143793 | Spain | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000014139 | IndustryBanks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.60% |
| C000014139 | IndustryPharmaceuticals | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| C000014139 | IndustryTrading Companies & Distributors | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000014139 | IndustryOil, Gas & Consumable Fuels | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000014139 | IndustryMachinery | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| C000014139 | IndustryInsurance | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000014139 | IndustryAutomobile Components | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000014139 | IndustryMetals & Mining | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000014139 | IndustryConstruction Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| C000014139 | IndustryConsumer Staples Distribution | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000014139 | Japan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22% |
| C000014139 | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.40% |
| C000014139 | Germany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| C000014139 | France | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000014139 | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000014139 | Australia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000014139 | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000014139 | Netherlands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| C000014139 | Italy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000014139 | Spain | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000014159 | Apple, Inc.FR_037833100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| C000014159 | Microsoft Corp.FR_594918104 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| C000014159 | NVIDIA Corp.FR_67066G104 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000014159 | Amazon.com, Inc.FR_023135106 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000014159 | Meta Platforms, Inc.FR_30303M102 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000014159 | Alphabet, Inc.FR_02079K305 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000014159 | Berkshire Hathaway, Inc.FR_084670702 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000014159 | Alphabet, Inc.FR_02079K107 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000014159 | Eli Lilly & Co.FR_532457108 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000014159 | Broadcom, Inc.FR_11135F101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| C000014159 | IndustryBanks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000014159 | IndustryPharmaceuticals | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000014159 | IndustryOil, Gas & Consumable Fuels | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000014159 | IndustrySemiconductors & Semiconductor Equipment | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| C000014159 | IndustrySoftware | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| C000014159 | IndustryTechnology Hardware, Storage & Peripherals | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| C000014159 | IndustryInteractive Media & Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000014159 | IndustryFinancial Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000014159 | IndustryBroadline Retail | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000014159 | IndustryHealth Care Providers & Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
