Form N-CSR Cover
Form N-CSR Cover | 12 Months Ended |
Jul. 31, 2024 | |
Shareholder Report [Line Items] | |
Document Type | N-CSR |
Amendment Flag | false |
Registrant Name | Fidelity Salem Street Trust |
Entity Central Index Key | 0000035315 |
Entity Investment Company Type | N-1A |
Document Period End Date | Jul. 31, 2024 |
Shareholder Report
Shareholder Report | 12 Months Ended |
Jul. 31, 2024 USD ($) shares | |
Shareholder Report [Line Items] | |
Document Type | N-CSR |
Amendment Flag | false |
Registrant Name | Fidelity Salem Street Trust |
Entity Central Index Key | 0000035315 |
Entity Investment Company Type | N-1A |
Document Period End Date | Jul. 31, 2024 |
Fidelity SAI U.S. Quality Index Fund | |
Shareholder Report [Line Items] | |
Fund Name | Fidelity® SAI U.S. Quality Index Fund |
Class Name | Fidelity® SAI U.S. Quality Index Fund |
Trading Symbol | FUQIX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® SAI U.S. Quality Index Fund for the period August 1, 2023 to July 31, 2024. |
Shareholder Report Annual or Semi-Annual | annual shareholder report |
Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-3455 or by sending an e-mail to fidfunddocuments@fidelity.com. |
Additional Information Phone Number | 1-800-544-3455 |
Additional Information Email | fidfunddocuments@fidelity.com |
Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® SAI U.S. Quality Index Fund $ 0.11 % |
Expenses Paid, Amount | $ 12 |
Expense Ratio, Percent | 0.11% |
Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • |
Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B25"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
Line Graph [Table Text Block] | How did the Fund perform over the life of Fund? CUMULATIVE PERFORMANCE October 8, 2015 through July 31, 2024. Initial investment of $10,000. Fidelity® SAI U.S. Quality Index Fund $10,000 $10,901 $12,503 $15,093 $16,556 $19,890 $26,383 $24,654 $28,344 $35,673 Fidelity SAI U.S. Quality Index Fund Linked Index℠ $10,000 $10,911 $12,543 $15,159 $16,640 $19,994 $26,537 $24,791 $28,554 $35,908 Fidelity U.S. Quality Focus Index℠ $10,000 $10,901 $12,503 $15,093 $16,573 $19,914 $26,430 $24,691 $28,439 $35,763 S&P 500® Index $10,000 $10,983 $12,745 $14,815 $15,998 $17,911 $24,439 $23,305 $26,339 $32,172 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year Life of Fund A Fidelity® SAI U.S. Quality Index Fund 25.86% 16.59% 15.51% Fidelity SAI U.S. Quality Index Fund Linked Index℠ 25.76% 16.63% 15.60% Fidelity U.S. Quality Focus Index℠ 25.76% 16.63% -% S&P 500® Index 22.15% 15.00% 14.17% A From October 8, 2015 Visit www.fidelity.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
Performance Inception Date | Oct. 08, 2015 |
No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
Net Assets | $ 14,176,823,098 |
Holdings Count | shares | 87 |
Advisory Fees Paid, Amount | $ 13,330,347 |
Investment Company Portfolio Turnover | 53% |
Additional Fund Statistics [Text Block] | Key Fund Statistics (as of July 31, 2024) KEY FACTS Fund Size $ Number of Holdings 87 Total Advisory Fee $ Portfolio Turnover 53 % |
Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 41.0 Health Care 15.1 Communication Services 11.9 Financials 10.8 Industrials 7.0 Consumer Staples 6.8 Consumer Discretionary 5.8 Real Estate 1.1 Energy 0.2 Materials 0.1 Common Stocks 99.8 Short-Term Investments and Net Other Assets (Liabilities) 0.2 ASSET ALLOCATION (% of Fund's net assets) United States 99.8 Israel 0.2 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Apple Inc 9.7 NVIDIA Corp 8.6 Alphabet Inc Class A 6.5 Meta Platforms Inc Class A 4.9 Microsoft Corp 4.1 Johnson & Johnson 4.0 Mastercard Inc Class A 3.8 Visa Inc Class A 3.7 Coca-Cola Co/The 3.6 Adobe Inc 3.4 52.3 |
Fidelity SAI Small-Mid Cap 500 Index Fund | |
Shareholder Report [Line Items] | |
Fund Name | Fidelity® SAI Small-Mid Cap 500 Index Fund |
Class Name | Fidelity® SAI Small-Mid Cap 500 Index Fund |
Trading Symbol | FZFLX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® SAI Small-Mid Cap 500 Index Fund for the period August 1, 2023 to July 31, 2024. |
Shareholder Report Annual or Semi-Annual | annual shareholder report |
Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-3455 or by sending an e-mail to fidfunddocuments@fidelity.com. |
Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
Additional Information Phone Number | 1-800-544-3455 |
Additional Information Email | fidfunddocuments@fidelity.com |
Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® SAI Small-Mid Cap 500 Index Fund $ 0.05 % |
Expenses Paid, Amount | $ 6 |
Expense Ratio, Percent | 0.05% |
Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • |
Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B53"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
Line Graph [Table Text Block] | How did the Fund perform over the life of Fund? CUMULATIVE PERFORMANCE August 12, 2015 through July 31, 2024. Initial investment of $10,000. Fidelity® SAI Small-Mid Cap 500 Index Fund $10,000 $10,326 $11,608 $13,455 $14,162 $14,159 $20,812 $18,952 $20,529 $23,029 Russell SMID 500™ Index $10,000 $10,335 $11,622 $13,496 $14,206 $14,207 $20,895 $19,035 $20,592 $23,107 Russell 3000® Index $10,000 $10,538 $12,239 $14,245 $15,249 $16,916 $23,466 $21,741 $24,491 $29,653 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year Life of Fund A Fidelity® SAI Small-Mid Cap 500 Index Fund 12.18% 10.21% 9.74% Russell SMID 500™ Index 12.21% 10.22% 9.78% Russell 3000® Index 21.07% 14.23% 12.87% A From August 12, 2015 Visit www.fidelity.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
Performance Inception Date | Aug. 12, 2015 |
No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
Net Assets | $ 1,734,459,634 |
Holdings Count | shares | 506 |
Advisory Fees Paid, Amount | $ 1,752,006 |
Investment Company Portfolio Turnover | 31% |
Additional Fund Statistics [Text Block] | Key Fund Statistics (as of July 31, 2024) KEY FACTS Fund Size $ Number of Holdings 506 Total Advisory Fee $ Portfolio Turnover 31 % |
Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Industrials 20.4 Financials 15.9 Consumer Discretionary 14.3 Information Technology 11.0 Health Care 9.5 Real Estate 7.5 Materials 6.9 Energy 5.1 Consumer Staples 3.9 Communication Services 3.4 Utilities 2.1 Common Stocks 100.0 Short-Term Investments and Net Other Assets (Liabilities) 0.0 ASSET ALLOCATION (% of Fund's net assets) United States 98.5 United Kingdom 0.4 Bermuda 0.3 Puerto Rico 0.2 Brazil 0.2 Belgium 0.2 Luxembourg 0.1 Japan 0.1 Finland 0.0 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Eqt Corp 0.7 Watsco Inc 0.6 Lennox International Inc 0.5 Packaging Corp of America 0.5 Textron Inc 0.5 EMCOR Group Inc 0.5 Reliance Inc 0.5 Avery Dennison Corp 0.5 Everest Group Ltd 0.5 Pure Storage Inc Class A 0.4 5.2 |
Material Fund Change [Text Block] | How has the Fund changed? This is a summary of certain changes to the Fund since August 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 28, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-544-3455 or by sending an e-mail to fidfunddocuments fidelity.com . The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: • Operating expenses • Expense reductions |
Material Fund Change Expenses [Text Block] | The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: • Operating expenses • Expense reductions |
Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since August 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 28, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-544-3455 or by sending an e-mail to fidfunddocuments fidelity.com . |
Updated Prospectus Phone Number | 1-800-544-3455</span>" id="sjs-B68"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-3455</span> |
Updated Prospectus Email Address | fidfunddocuments@fidelity.com</span>" id="sjs-B69"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span> |
Updated Prospectus Web Address | fundresearch.fidelity.com/prospectus/sec</span>" id="sjs-B70"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span> |
Fidelity SAI U.S. Momentum Index Fund | |
Shareholder Report [Line Items] | |
Fund Name | Fidelity® SAI U.S. Momentum Index Fund |
Class Name | Fidelity® SAI U.S. Momentum Index Fund |
Trading Symbol | FUMIX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® SAI U.S. Momentum Index Fund for the period August 1, 2023 to July 31, 2024. |
Shareholder Report Annual or Semi-Annual | annual shareholder report |
Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-3455 or by sending an e-mail to fidfunddocuments@fidelity.com. |
Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
Additional Information Phone Number | 1-800-544-3455 |
Additional Information Email | fidfunddocuments@fidelity.com |
Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® SAI U.S. Momentum Index Fund $ 0.13 % |
Expenses Paid, Amount | $ 15 |
Expense Ratio, Percent | 0.13% |
Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • |
Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B87"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
Line Graph [Table Text Block] | How did the Fund perform over the life of Fund? CUMULATIVE PERFORMANCE February 9, 2017 through July 31, 2024. Initial investment of $10,000. Fidelity® SAI U.S. Momentum Index Fund $10,000 $10,980 $13,432 $14,363 $16,770 $22,301 $19,835 $21,024 MSCI USA Custom Momentum Composite Index $10,000 $11,002 $13,464 $14,416 $16,851 $22,435 $19,974 $21,212 MSCI USA Index $10,000 $10,768 $12,450 $13,375 $15,041 $20,620 $19,123 $21,529 2017 2018 2019 2020 2021 2022 2023 2024 |
Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year Life of Fund A Fidelity® SAI U.S. Momentum Index Fund 35.08% 14.61% 14.98% MSCI USA Custom Momentum Composite Index 35.04% 14.72% 15.11% MSCI USA Index 21.48% 14.35% 13.72% A From February 9, 2017 Visit www.fidelity.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
Performance Inception Date | Feb. 09, 2017 |
No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
Net Assets | $ 645,694,919 |
Holdings Count | shares | 234 |
Advisory Fees Paid, Amount | $ 446,924 |
Investment Company Portfolio Turnover | 104% |
Additional Fund Statistics [Text Block] | Key Fund Statistics (as of July 31, 2024) KEY FACTS Fund Size $ Number of Holdings 234 Total Advisory Fee $ Portfolio Turnover 104 % |
Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 30.9 Financials 15.4 Industrials 15.2 Communication Services 10.4 Consumer Discretionary 10.0 Health Care 9.8 Consumer Staples 4.1 Utilities 1.5 Materials 1.4 Energy 0.9 Real Estate 0.3 Common Stocks 99.9 Short-Term Investments and Net Other Assets (Liabilities) 0.1 ASSET ALLOCATION (% of Fund's net assets) United States 99.7 China 0.2 Brazil 0.1 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Broadcom Inc 5.2 Amazon.com Inc 5.2 NVIDIA Corp 5.1 Meta Platforms Inc Class A 4.9 Eli Lilly & Co 4.7 JPMorgan Chase & Co 3.8 Microsoft Corp 3.2 Costco Wholesale Corp 3.2 General Electric Co 2.3 Netflix Inc 1.9 39.5 |
Material Fund Change [Text Block] | How has the Fund changed? This is a summary of certain changes to the Fund since August 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 28, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-544-3455 or by sending an e-mail to fidfunddocuments fidelity.com . The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: • Operating expenses |
Material Fund Change Expenses [Text Block] | The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: • Operating expenses |
Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since August 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 28, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-544-3455 or by sending an e-mail to fidfunddocuments fidelity.com . |
Updated Prospectus Phone Number | 1-800-544-3455</span>" id="sjs-B102"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-3455</span> |
Updated Prospectus Email Address | fidfunddocuments@fidelity.com</span>" id="sjs-B103"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span> |
Updated Prospectus Web Address | fundresearch.fidelity.com/prospectus/sec</span>" id="sjs-B104"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span> |
Fidelity Real Estate Index Fund | |
Shareholder Report [Line Items] | |
Fund Name | Fidelity® Real Estate Index Fund |
Class Name | Fidelity® Real Estate Index Fund |
Trading Symbol | FSRNX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Real Estate Index Fund for the period August 1, 2023 to July 31, 2024. |
Shareholder Report Annual or Semi-Annual | annual shareholder report |
Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544 or by sending an e-mail to fidfunddocuments@fidelity.com. |
Additional Information Phone Number | 1-800-544-8544 |
Additional Information Email | fidfunddocuments@fidelity.com |
Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Real Estate Index Fund $ 0.07 % |
Expenses Paid, Amount | $ 7 |
Expense Ratio, Percent | 0.07% |
Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • |
Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B120"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
Line Graph [Table Text Block] | How did the Fund perform over the past 10 years? CUMULATIVE PERFORMANCE July 31, 2014 through July 31, 2024. Initial investment of $10,000. Fidelity® Real Estate Index Fund $10,000 $11,129 $13,433 $12,680 $13,174 $14,602 $12,216 $17,069 $16,350 $14,764 $16,333 Fidelity Real Estate Linked Index℠ $10,000 $11,129 $13,457 $12,695 $13,185 $14,621 $12,238 $17,133 $16,409 $14,825 $16,415 MSCI US IMI Real Estate 25/25 Index $10,000 $11,129 $13,433 $13,204 $13,810 $15,636 $14,843 $20,304 $19,446 $17,568 $19,453 S&P 500® Index $10,000 $11,121 $11,745 $13,629 $15,843 $17,108 $19,153 $26,134 $24,921 $28,165 $34,403 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year 10 Year Fidelity® Real Estate Index Fund 10.63% 2.27% 5.03% Fidelity Real Estate Linked Index℠ 10.73% 2.34% 5.08% MSCI US IMI Real Estate 25/25 Index 10.73% 4.46% -% S&P 500® Index 22.15% 15.00% 13.15% Visit www.fidelity.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
Net Assets | $ 2,726,235,514 |
Holdings Count | shares | 156 |
Advisory Fees Paid, Amount | $ 1,716,716 |
Investment Company Portfolio Turnover | 5% |
Additional Fund Statistics [Text Block] | Key Fund Statistics (as of July 31, 2024) KEY FACTS Fund Size $ Number of Holdings 156 Total Advisory Fee $ Portfolio Turnover 5 % |
Holdings [Text Block] | TOP INDUSTRIES (% of Fund's net assets) Specialized REITs 36.0 Retail REITs 13.1 Residential REITs 12.8 Industrial REITs 11.8 Health Care REITs 10.6 Real Estate Management & Development 7.6 Office REITs 3.3 Hotel & Resort REITs 2.5 Diversified REITs 1.9 Common Stocks 99.6 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets) United States 100.0 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Prologis Inc 8.1 American Tower Corp 7.2 Equinix Inc 5.3 Welltower Inc 4.5 Simon Property Group Inc 3.6 Realty Income Corp 3.4 Crown Castle Inc 3.4 Public Storage Operating Co 3.2 Digital Realty Trust Inc 3.2 CBRE Group Inc Class A 2.4 44.3 |
Fidelity SAI U.S. Value Index Fund | |
Shareholder Report [Line Items] | |
Fund Name | Fidelity® SAI U.S. Value Index Fund |
Class Name | Fidelity® SAI U.S. Value Index Fund |
Trading Symbol | FSWCX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® SAI U.S. Value Index Fund for the period August 1, 2023 to July 31, 2024. |
Shareholder Report Annual or Semi-Annual | annual shareholder report |
Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-3455 or by sending an e-mail to fidfunddocuments@fidelity.com. |
Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
Additional Information Phone Number | 1-800-544-3455 |
Additional Information Email | fidfunddocuments@fidelity.com |
Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® SAI U.S. Value Index Fund $ 0.11 % |
Expenses Paid, Amount | $ 12 |
Expense Ratio, Percent | 0.11% |
Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • |
Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B147"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
Line Graph [Table Text Block] | How did the Fund perform over the life of Fund? CUMULATIVE PERFORMANCE December 19, 2017 through July 31, 2024. Initial investment of $10,000. Fidelity® SAI U.S. Value Index Fund $10,000 $10,367 $10,431 $9,375 $13,348 $14,044 $14,991 $17,716 Fidelity U.S. Value Focus Index℠ $10,000 $10,382 $10,441 $9,377 $13,369 $14,083 $15,064 $17,800 S&P 500® Index $10,000 $10,621 $11,469 $12,841 $17,520 $16,708 $18,882 $23,064 2017 2018 2019 2020 2021 2022 2023 2024 |
Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year Life of Fund A Fidelity® SAI U.S. Value Index Fund 18.17% 11.17% 9.02% Fidelity U.S. Value Focus Index℠ 18.16% 11.26% 9.10% S&P 500® Index 22.15% 15.00% 13.46% A From December 19, 2017 Visit www.fidelity.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
Performance Inception Date | Dec. 19, 2017 |
No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
Net Assets | $ 4,113,484,200 |
Holdings Count | shares | 204 |
Advisory Fees Paid, Amount | $ 1,879,685 |
Investment Company Portfolio Turnover | 63% |
Additional Fund Statistics [Text Block] | Key Fund Statistics (as of July 31, 2024) KEY FACTS Fund Size $ Number of Holdings 204 Total Advisory Fee $ Portfolio Turnover 63 % |
Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Financials 23.1 Information Technology 20.7 Energy 13.3 Health Care 12.9 Communication Services 8.6 Consumer Discretionary 5.9 Industrials 5.4 Materials 5.3 Consumer Staples 3.7 Real Estate 0.4 Utilities 0.2 Common Stocks 99.5 Short-Term Investments and Net Other Assets (Liabilities) 0.5 ASSET ALLOCATION (% of Fund's net assets) United States 99.2 Ireland 0.2 Bermuda 0.2 China 0.2 Peru 0.2 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Exxon Mobil Corp 3.8 JPMorgan Chase & Co 3.8 Chevron Corp 3.5 Bank of America Corp 3.3 Microsoft Corp 3.2 Apple Inc 3.2 NVIDIA Corp 2.8 Wells Fargo & Co 2.7 Cisco Systems Inc 2.6 International Business Machines Corp 2.4 31.3 |
Material Fund Change [Text Block] | How has the Fund changed? This is a summary of certain changes to the Fund since August 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 28, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-544-3455 or by sending an e-mail to fidfunddocuments fidelity.com . The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: • Operating expenses |
Material Fund Change Expenses [Text Block] | The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: • Operating expenses |
Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since August 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 28, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-544-3455 or by sending an e-mail to fidfunddocuments fidelity.com . |
Updated Prospectus Phone Number | 1-800-544-3455</span>" id="sjs-B162"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-3455</span> |
Updated Prospectus Email Address | fidfunddocuments@fidelity.com</span>" id="sjs-B163"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span> |
Updated Prospectus Web Address | fundresearch.fidelity.com/prospectus/sec</span>" id="sjs-B164"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span> |
Fidelity SAI Real Estate Index Fund | |
Shareholder Report [Line Items] | |
Fund Name | Fidelity® SAI Real Estate Index Fund |
Class Name | Fidelity® SAI Real Estate Index Fund |
Trading Symbol | FESIX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® SAI Real Estate Index Fund for the period August 1, 2023 to July 31, 2024. |
Shareholder Report Annual or Semi-Annual | annual shareholder report |
Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-3455 or by sending an e-mail to fidfunddocuments@fidelity.com. |
Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
Additional Information Phone Number | 1-800-544-3455 |
Additional Information Email | fidfunddocuments@fidelity.com |
Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® SAI Real Estate Index Fund $ 0.07 % |
Expenses Paid, Amount | $ 7 |
Expense Ratio, Percent | 0.07% |
Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • |
Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B181"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
Line Graph [Table Text Block] | How did the Fund perform over the life of Fund? CUMULATIVE PERFORMANCE February 2, 2016 through July 31, 2024. Initial investment of $10,000. Fidelity® SAI Real Estate Index Fund $10,000 $12,152 $11,471 $11,915 $13,200 $11,083 $15,485 $14,829 $13,395 Fidelity Real Estate Linked Index℠ $10,000 $12,170 $11,482 $11,924 $13,223 $11,068 $15,495 $14,841 $13,408 MSCI US IMI Real Estate 25/25 Index $10,000 $12,152 $11,940 $12,488 $14,139 $13,422 $18,360 $17,496 $15,886 S&P 500® Index $10,000 $11,549 $13,402 $15,579 $16,823 $18,834 $25,699 $24,506 $27,696 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year Life of Fund A Fidelity® SAI Real Estate Index Fund 10.30% 2.28% 4.70% Fidelity Real Estate Linked Index℠ 10.73% 2.34% 4.76% MSCI US IMI Real Estate 25/25 Index 10.73% 4.46% -% S&P 500® Index 22.15% 15.00% 15.42% A From February 2, 2016 Visit www.fidelity.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
Performance Inception Date | Feb. 02, 2016 |
No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
Net Assets | $ 2,578,643 |
Holdings Count | shares | 155 |
Advisory Fees Paid, Amount | $ 56,242 |
Investment Company Portfolio Turnover | 7% |
Additional Fund Statistics [Text Block] | Key Fund Statistics (as of July 31, 2024) KEY FACTS Fund Size $ Number of Holdings 155 Total Advisory Fee $ Portfolio Turnover 7 % |
Holdings [Text Block] | TOP INDUSTRIES (% of Fund's net assets) Specialized REITs 35.6 Retail REITs 13.0 Residential REITs 12.6 Industrial REITs 11.7 Health Care REITs 10.4 Real Estate Management & Development 7.5 Office REITs 3.3 Hotel & Resort REITs 2.4 Diversified REITs 2.0 Common Stocks 98.5 Short-Term Investments and Net Other Assets (Liabilities) 1.5 ASSET ALLOCATION (% of Fund's net assets) United States 100.0 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Prologis Inc 8.0 American Tower Corp 7.1 Equinix Inc 5.2 Welltower Inc 4.3 Simon Property Group Inc 3.5 Realty Income Corp 3.4 Crown Castle Inc 3.3 Public Storage Operating Co 3.2 Digital Realty Trust Inc 3.2 CBRE Group Inc Class A 2.4 43.6 |
Material Fund Change [Text Block] | How has the Fund changed? This is a summary of certain changes to the Fund since August 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 28, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-544-3455 or by sending an e-mail to fidfunddocuments fidelity.com . The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: • Operating expenses • Expense reductions |
Material Fund Change Expenses [Text Block] | The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: • Operating expenses • Expense reductions |
Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since August 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 28, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-544-3455 or by sending an e-mail to fidfunddocuments fidelity.com . |
Updated Prospectus Phone Number | 1-800-544-3455</span>" id="sjs-B196"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-3455</span> |
Updated Prospectus Email Address | fidfunddocuments@fidelity.com</span>" id="sjs-B197"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span> |
Updated Prospectus Web Address | fundresearch.fidelity.com/prospectus/sec</span>" id="sjs-B198"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span> |
Fidelity SAI U.S. Large Cap Index Fund | |
Shareholder Report [Line Items] | |
Fund Name | Fidelity® SAI U.S. Large Cap Index Fund |
Class Name | Fidelity® SAI U.S. Large Cap Index Fund |
Trading Symbol | FLCPX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® SAI U.S. Large Cap Index Fund for the period August 1, 2023 to July 31, 2024. |
Shareholder Report Annual or Semi-Annual | annual shareholder report |
Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-3455 or by sending an e-mail to fidfunddocuments@fidelity.com. |
Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
Additional Information Phone Number | 1-800-544-3455 |
Additional Information Email | fidfunddocuments@fidelity.com |
Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® SAI U.S. Large Cap Index Fund $ 0.02 % |
Expenses Paid, Amount | $ 2 |
Expense Ratio, Percent | 0.02% |
Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • |
Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B215"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
Line Graph [Table Text Block] | How did the Fund perform over the life of Fund? CUMULATIVE PERFORMANCE February 2, 2016 through July 31, 2024. Initial investment of $10,000. Fidelity® SAI U.S. Large Cap Index Fund $10,000 $11,550 $13,401 $15,574 $16,816 $18,807 $25,659 $24,459 $27,635 S&P 500® Index $10,000 $11,549 $13,402 $15,579 $16,823 $18,834 $25,699 $24,506 $27,696 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year Life of Fund A Fidelity® SAI U.S. Large Cap Index Fund 22.14% 14.95% 15.39% S&P 500® Index 22.15% 15.00% 15.42% A From February 2, 2016 Visit www.fidelity.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
Performance Inception Date | Feb. 02, 2016 |
No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
Net Assets | $ 14,911,051,242 |
Holdings Count | shares | 507 |
Advisory Fees Paid, Amount | $ 1,842,847 |
Investment Company Portfolio Turnover | 40% |
Additional Fund Statistics [Text Block] | Key Fund Statistics (as of July 31, 2024) KEY FACTS Fund Size $ Number of Holdings 507 Total Advisory Fee $ Portfolio Turnover 40 % |
Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 31.3 Financials 13.0 Health Care 11.8 Consumer Discretionary 10.0 Communication Services 8.8 Industrials 8.4 Consumer Staples 5.8 Energy 3.7 Utilities 2.4 Real Estate 2.3 Materials 2.2 Common Stocks 99.7 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets) United States 99.5 Ireland 0.4 China 0.1 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Apple Inc 6.9 Microsoft Corp 6.7 NVIDIA Corp 6.3 Amazon.com Inc 3.7 Meta Platforms Inc Class A 2.2 Alphabet Inc Class A 2.2 Alphabet Inc Class C 1.8 Berkshire Hathaway Inc Class B 1.8 Broadcom Inc 1.6 Tesla Inc 1.4 34.6 |
Material Fund Change [Text Block] | How has the Fund changed? This is a summary of certain changes to the Fund since August 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 28, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-544-3455 or by sending an e-mail to fidfunddocuments fidelity.com . The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: • Operating expenses |
Material Fund Change Expenses [Text Block] | The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: • Operating expenses |
Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since August 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 28, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-544-3455 or by sending an e-mail to fidfunddocuments fidelity.com . |
Updated Prospectus Phone Number | 1-800-544-3455</span>" id="sjs-B230"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-3455</span> |
Updated Prospectus Email Address | fidfunddocuments@fidelity.com</span>" id="sjs-B231"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span> |
Updated Prospectus Web Address | fundresearch.fidelity.com/prospectus/sec</span>" id="sjs-B232"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span> |
Shareholder Report, Line Graph
Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | 60 Months Ended | 96 Months Ended | 108 Months Ended | 120 Months Ended | 132 Months Ended | ||||||||||
Jul. 31, 2024 | Jul. 31, 2024 | Jul. 31, 2024 | Jul. 31, 2024 | Jul. 31, 2024 | Jul. 31, 2024 | Jul. 31, 2023 | Jul. 31, 2022 | Jul. 31, 2021 | Jul. 31, 2020 | Jul. 31, 2019 | Jul. 31, 2018 | Jul. 31, 2017 | Jul. 31, 2016 | Jul. 31, 2015 | Jul. 31, 2014 | |
C000161034_0_LG_BBIndexMember_10YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | S&P 500® Index</span>" id="sjs-F5"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span> | |||||||||||||||
C000161034_0_BBIndexMember_AsOf_2015Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 10,000 | |||||||||||||||
C000161034_0_BBIndexMember_AsOf_2016Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 10,983 | |||||||||||||||
C000161034_0_BBIndexMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 12,745 | |||||||||||||||
C000161034_0_BBIndexMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 14,815 | |||||||||||||||
C000161034_0_BBIndexMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 15,998 | |||||||||||||||
C000161034_0_BBIndexMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 17,911 | |||||||||||||||
C000161034_0_BBIndexMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 24,439 | |||||||||||||||
C000161034_0_BBIndexMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 23,305 | |||||||||||||||
C000161034_0_BBIndexMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 26,339 | |||||||||||||||
C000161034_0_BBIndexMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 32,172 | $ 32,172 | $ 32,172 | $ 32,172 | $ 32,172 | $ 32,172 | ||||||||||
C000161034_2_BBIndexMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 22.15% | |||||||||||||||
C000161034_2_BBIndexMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 15% | |||||||||||||||
C000161034_2_BBIndexMember_LOCMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 14.17% | |||||||||||||||
C000158877_1_BBIndexMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 21.07% | |||||||||||||||
C000158877_1_BBIndexMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 14.23% | |||||||||||||||
C000158877_1_BBIndexMember_LOCMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 12.87% | |||||||||||||||
C000177148_1_BBIndexMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 21.48% | |||||||||||||||
C000177148_1_BBIndexMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 14.35% | |||||||||||||||
C000177148_1_BBIndexMember_LOCMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 13.72% | |||||||||||||||
C000103377_0_LG_BBIndexMember_11YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | S&P 500® Index</span>" id="sjs-G65"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span> | |||||||||||||||
C000103377_0_BBIndexMember_AsOf_2014Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 10,000 | |||||||||||||||
C000103377_0_BBIndexMember_AsOf_2015Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 11,121 | |||||||||||||||
C000103377_0_BBIndexMember_AsOf_2016Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 11,745 | |||||||||||||||
C000103377_0_BBIndexMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,629 | |||||||||||||||
C000103377_0_BBIndexMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 15,843 | |||||||||||||||
C000103377_0_BBIndexMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 17,108 | |||||||||||||||
C000103377_0_BBIndexMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 19,153 | |||||||||||||||
C000103377_0_BBIndexMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 26,134 | |||||||||||||||
C000103377_0_BBIndexMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 24,921 | |||||||||||||||
C000103377_0_BBIndexMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 28,165 | |||||||||||||||
C000103377_0_BBIndexMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 34,403 | $ 34,403 | 34,403 | $ 34,403 | $ 34,403 | $ 34,403 | ||||||||||
C000103377_2_BBIndexMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 22.15% | |||||||||||||||
C000103377_2_BBIndexMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 15% | |||||||||||||||
C000103377_2_BBIndexMember_10YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 13.15% | |||||||||||||||
C000195574_1_BBIndexMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 22.15% | |||||||||||||||
C000195574_1_BBIndexMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 15% | |||||||||||||||
C000195574_1_BBIndexMember_LOCMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 13.46% | |||||||||||||||
C000163539_0_LG_BBIndexMember_9YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | S&P 500® Index</span>" id="sjs-E119"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span> | |||||||||||||||
C000163539_0_BBIndexMember_AsOf_2016Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000163539_0_BBIndexMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 11,549 | |||||||||||||||
C000163539_0_BBIndexMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,402 | |||||||||||||||
C000163539_0_BBIndexMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 15,579 | |||||||||||||||
C000163539_0_BBIndexMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 16,823 | |||||||||||||||
C000163539_0_BBIndexMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 18,834 | |||||||||||||||
C000163539_0_BBIndexMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 25,699 | |||||||||||||||
C000163539_0_BBIndexMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 24,506 | |||||||||||||||
C000163539_0_BBIndexMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 27,696 | $ 27,696 | 27,696 | $ 27,696 | $ 27,696 | 27,696 | ||||||||||
C000163539_2_BBIndexMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 22.15% | |||||||||||||||
C000163539_2_BBIndexMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 15% | |||||||||||||||
C000163539_2_BBIndexMember_LOCMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 15.42% | |||||||||||||||
C000163540_0_BBIndexMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 22.15% | |||||||||||||||
C000163540_0_BBIndexMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 15% | |||||||||||||||
C000163540_0_BBIndexMember_LOCMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 15.42% | |||||||||||||||
C000161034_LG_ClassMember_10YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | Fidelity® SAI U.S. Quality Index Fund</span>" id="sjs-F167"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® SAI U.S. Quality Index Fund</span> | |||||||||||||||
C000161034_ClassMember_AsOf_2015Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000161034_ClassMember_AsOf_2016Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,901 | |||||||||||||||
C000161034_ClassMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 12,503 | |||||||||||||||
C000161034_ClassMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 15,093 | |||||||||||||||
C000161034_ClassMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 16,556 | |||||||||||||||
C000161034_ClassMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 19,890 | |||||||||||||||
C000161034_ClassMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 26,383 | |||||||||||||||
C000161034_ClassMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 24,654 | |||||||||||||||
C000161034_ClassMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 28,344 | |||||||||||||||
C000161034_ClassMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 35,673 | $ 35,673 | 35,673 | 35,673 | $ 35,673 | 35,673 | ||||||||||
C000161034_LG_1_AdditionalIndexMember_10YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | Fidelity SAI U.S. Quality Index Fund Linked Index℠</span>" id="sjs-F200"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity SAI U.S. Quality Index Fund Linked Index℠</span> | |||||||||||||||
C000161034_1_AdditionalIndexMember_AsOf_2015Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000161034_1_AdditionalIndexMember_AsOf_2016Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,911 | |||||||||||||||
C000161034_1_AdditionalIndexMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 12,543 | |||||||||||||||
C000161034_1_AdditionalIndexMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 15,159 | |||||||||||||||
C000161034_1_AdditionalIndexMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 16,640 | |||||||||||||||
C000161034_1_AdditionalIndexMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 19,994 | |||||||||||||||
C000161034_1_AdditionalIndexMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 26,537 | |||||||||||||||
C000161034_1_AdditionalIndexMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 24,791 | |||||||||||||||
C000161034_1_AdditionalIndexMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 28,554 | |||||||||||||||
C000161034_1_AdditionalIndexMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 35,908 | 35,908 | 35,908 | 35,908 | $ 35,908 | 35,908 | ||||||||||
C000161034_LG_2_AdditionalIndexMember_10YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | Fidelity U.S. Quality Focus Index℠</span>" id="sjs-F233"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity U.S. Quality Focus Index℠</span> | |||||||||||||||
C000161034_2_AdditionalIndexMember_AsOf_2015Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000161034_2_AdditionalIndexMember_AsOf_2016Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,901 | |||||||||||||||
C000161034_2_AdditionalIndexMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 12,503 | |||||||||||||||
C000161034_2_AdditionalIndexMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 15,093 | |||||||||||||||
C000161034_2_AdditionalIndexMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 16,573 | |||||||||||||||
C000161034_2_AdditionalIndexMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 19,914 | |||||||||||||||
C000161034_2_AdditionalIndexMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 26,430 | |||||||||||||||
C000161034_2_AdditionalIndexMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 24,691 | |||||||||||||||
C000161034_2_AdditionalIndexMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 28,439 | |||||||||||||||
C000161034_2_AdditionalIndexMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 35,763 | $ 35,763 | 35,763 | 35,763 | $ 35,763 | 35,763 | ||||||||||
C000161034_NoLoadClassMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 25.86% | |||||||||||||||
C000161034_NoLoadClassMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 16.59% | |||||||||||||||
C000161034_NoLoadClassMember_2023-08-01_2024-07-31Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 15.51% | |||||||||||||||
C000161034_0_AdditionalIndexMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 25.76% | |||||||||||||||
C000161034_0_AdditionalIndexMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 16.63% | |||||||||||||||
C000161034_0_AdditionalIndexMember_LOCMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 15.60% | |||||||||||||||
C000161034_1_AdditionalIndexMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 25.76% | |||||||||||||||
C000161034_1_AdditionalIndexMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 16.63% | |||||||||||||||
C000161034_1_AdditionalIndexMember_LOCMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | ||||||||||||||||
C000158877_LG_ClassMember_10YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | Fidelity® SAI Small-Mid Cap 500 Index Fund</span>" id="sjs-F293"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® SAI Small-Mid Cap 500 Index Fund</span> | |||||||||||||||
C000158877_ClassMember_AsOf_2015Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000158877_ClassMember_AsOf_2016Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,326 | |||||||||||||||
C000158877_ClassMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 11,608 | |||||||||||||||
C000158877_ClassMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,455 | |||||||||||||||
C000158877_ClassMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,162 | |||||||||||||||
C000158877_ClassMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,159 | |||||||||||||||
C000158877_ClassMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 20,812 | |||||||||||||||
C000158877_ClassMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 18,952 | |||||||||||||||
C000158877_ClassMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 20,529 | |||||||||||||||
C000158877_ClassMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 23,029 | $ 23,029 | 23,029 | 23,029 | $ 23,029 | 23,029 | ||||||||||
C000158877_LG_1_AdditionalIndexMember_10YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | Russell SMID 500™ Index</span>" id="sjs-F326"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell SMID 500™ Index</span> | |||||||||||||||
C000158877_1_AdditionalIndexMember_AsOf_2015Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000158877_1_AdditionalIndexMember_AsOf_2016Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,335 | |||||||||||||||
C000158877_1_AdditionalIndexMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 11,622 | |||||||||||||||
C000158877_1_AdditionalIndexMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,496 | |||||||||||||||
C000158877_1_AdditionalIndexMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,206 | |||||||||||||||
C000158877_1_AdditionalIndexMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,207 | |||||||||||||||
C000158877_1_AdditionalIndexMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 20,895 | |||||||||||||||
C000158877_1_AdditionalIndexMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 19,035 | |||||||||||||||
C000158877_1_AdditionalIndexMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 20,592 | |||||||||||||||
C000158877_1_AdditionalIndexMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 23,107 | 23,107 | 23,107 | 23,107 | $ 23,107 | 23,107 | ||||||||||
C000158877_LG_2_AdditionalIndexMember_10YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | Russell 3000® Index</span>" id="sjs-F359"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Index</span> | |||||||||||||||
C000158877_2_AdditionalIndexMember_AsOf_2015Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000158877_2_AdditionalIndexMember_AsOf_2016Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,538 | |||||||||||||||
C000158877_2_AdditionalIndexMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 12,239 | |||||||||||||||
C000158877_2_AdditionalIndexMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,245 | |||||||||||||||
C000158877_2_AdditionalIndexMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 15,249 | |||||||||||||||
C000158877_2_AdditionalIndexMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 16,916 | |||||||||||||||
C000158877_2_AdditionalIndexMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 23,466 | |||||||||||||||
C000158877_2_AdditionalIndexMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 21,741 | |||||||||||||||
C000158877_2_AdditionalIndexMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 24,491 | |||||||||||||||
C000158877_2_AdditionalIndexMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 29,653 | $ 29,653 | $ 29,653 | 29,653 | $ 29,653 | 29,653 | ||||||||||
C000158877_NoLoadClassMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 12.18% | |||||||||||||||
C000158877_NoLoadClassMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 10.21% | |||||||||||||||
C000158877_NoLoadClassMember_2023-08-01_2024-07-31Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 9.74% | |||||||||||||||
C000158877_0_AdditionalIndexMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 12.21% | |||||||||||||||
C000158877_0_AdditionalIndexMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 10.22% | |||||||||||||||
C000158877_0_AdditionalIndexMember_LOCMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 9.78% | |||||||||||||||
C000177148_LG_ClassMember_8YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | Fidelity® SAI U.S. Momentum Index Fund</span>" id="sjs-D410"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® SAI U.S. Momentum Index Fund</span> | |||||||||||||||
C000177148_ClassMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000177148_ClassMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,980 | |||||||||||||||
C000177148_ClassMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,432 | |||||||||||||||
C000177148_ClassMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,363 | |||||||||||||||
C000177148_ClassMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 16,770 | |||||||||||||||
C000177148_ClassMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 22,301 | |||||||||||||||
C000177148_ClassMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 19,835 | |||||||||||||||
C000177148_ClassMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 21,024 | $ 21,024 | $ 21,024 | 21,024 | 21,024 | 21,024 | ||||||||||
C000177148_LG_1_AdditionalIndexMember_8YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | MSCI USA Custom Momentum Composite Index</span>" id="sjs-D437"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI USA Custom Momentum Composite Index</span> | |||||||||||||||
C000177148_1_AdditionalIndexMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000177148_1_AdditionalIndexMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 11,002 | |||||||||||||||
C000177148_1_AdditionalIndexMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,464 | |||||||||||||||
C000177148_1_AdditionalIndexMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,416 | |||||||||||||||
C000177148_1_AdditionalIndexMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 16,851 | |||||||||||||||
C000177148_1_AdditionalIndexMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 22,435 | |||||||||||||||
C000177148_1_AdditionalIndexMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 19,974 | |||||||||||||||
C000177148_1_AdditionalIndexMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 21,212 | 21,212 | $ 21,212 | 21,212 | 21,212 | 21,212 | ||||||||||
C000177148_LG_2_AdditionalIndexMember_8YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | MSCI USA Index</span>" id="sjs-D464"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI USA Index</span> | |||||||||||||||
C000177148_2_AdditionalIndexMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000177148_2_AdditionalIndexMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,768 | |||||||||||||||
C000177148_2_AdditionalIndexMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 12,450 | |||||||||||||||
C000177148_2_AdditionalIndexMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,375 | |||||||||||||||
C000177148_2_AdditionalIndexMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 15,041 | |||||||||||||||
C000177148_2_AdditionalIndexMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 20,620 | |||||||||||||||
C000177148_2_AdditionalIndexMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 19,123 | |||||||||||||||
C000177148_2_AdditionalIndexMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 21,529 | $ 21,529 | $ 21,529 | 21,529 | 21,529 | $ 21,529 | ||||||||||
C000177148_NoLoadClassMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 35.08% | |||||||||||||||
C000177148_NoLoadClassMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 14.61% | |||||||||||||||
C000177148_NoLoadClassMember_2023-08-01_2024-07-31Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 14.98% | |||||||||||||||
C000177148_0_AdditionalIndexMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 35.04% | |||||||||||||||
C000177148_0_AdditionalIndexMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 14.72% | |||||||||||||||
C000177148_0_AdditionalIndexMember_LOCMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 15.11% | |||||||||||||||
C000103377_LG_ClassMember_11YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | Fidelity® Real Estate Index Fund</span>" id="sjs-G509"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Real Estate Index Fund</span> | |||||||||||||||
C000103377_ClassMember_AsOf_2014Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000103377_ClassMember_AsOf_2015Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 11,129 | |||||||||||||||
C000103377_ClassMember_AsOf_2016Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,433 | |||||||||||||||
C000103377_ClassMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 12,680 | |||||||||||||||
C000103377_ClassMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,174 | |||||||||||||||
C000103377_ClassMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,602 | |||||||||||||||
C000103377_ClassMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 12,216 | |||||||||||||||
C000103377_ClassMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 17,069 | |||||||||||||||
C000103377_ClassMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 16,350 | |||||||||||||||
C000103377_ClassMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,764 | |||||||||||||||
C000103377_ClassMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 16,333 | $ 16,333 | 16,333 | 16,333 | 16,333 | $ 16,333 | ||||||||||
C000103377_LG_1_AdditionalIndexMember_11YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | Fidelity Real Estate Linked Index℠</span>" id="sjs-G545"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Real Estate Linked Index℠</span> | |||||||||||||||
C000103377_1_AdditionalIndexMember_AsOf_2014Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000103377_1_AdditionalIndexMember_AsOf_2015Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 11,129 | |||||||||||||||
C000103377_1_AdditionalIndexMember_AsOf_2016Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,457 | |||||||||||||||
C000103377_1_AdditionalIndexMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 12,695 | |||||||||||||||
C000103377_1_AdditionalIndexMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,185 | |||||||||||||||
C000103377_1_AdditionalIndexMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,621 | |||||||||||||||
C000103377_1_AdditionalIndexMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 12,238 | |||||||||||||||
C000103377_1_AdditionalIndexMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 17,133 | |||||||||||||||
C000103377_1_AdditionalIndexMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 16,409 | |||||||||||||||
C000103377_1_AdditionalIndexMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,825 | |||||||||||||||
C000103377_1_AdditionalIndexMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 16,415 | 16,415 | 16,415 | 16,415 | 16,415 | $ 16,415 | ||||||||||
C000103377_LG_2_AdditionalIndexMember_11YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | MSCI US IMI Real Estate 25/25 Index</span>" id="sjs-G581"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI US IMI Real Estate 25/25 Index</span> | |||||||||||||||
C000103377_2_AdditionalIndexMember_AsOf_2014Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 10,000 | |||||||||||||||
C000103377_2_AdditionalIndexMember_AsOf_2015Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 11,129 | |||||||||||||||
C000103377_2_AdditionalIndexMember_AsOf_2016Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,433 | |||||||||||||||
C000103377_2_AdditionalIndexMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,204 | |||||||||||||||
C000103377_2_AdditionalIndexMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,810 | |||||||||||||||
C000103377_2_AdditionalIndexMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 15,636 | |||||||||||||||
C000103377_2_AdditionalIndexMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,843 | |||||||||||||||
C000103377_2_AdditionalIndexMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 20,304 | |||||||||||||||
C000103377_2_AdditionalIndexMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 19,446 | |||||||||||||||
C000103377_2_AdditionalIndexMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 17,568 | |||||||||||||||
C000103377_2_AdditionalIndexMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 19,453 | $ 19,453 | $ 19,453 | 19,453 | $ 19,453 | $ 19,453 | ||||||||||
C000103377_NoLoadClassMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 10.63% | |||||||||||||||
C000103377_NoLoadClassMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 2.27% | |||||||||||||||
C000103377_NoLoadClassMember_10YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 5.03% | |||||||||||||||
C000103377_0_AdditionalIndexMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 10.73% | |||||||||||||||
C000103377_0_AdditionalIndexMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 2.34% | |||||||||||||||
C000103377_0_AdditionalIndexMember_10YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 5.08% | |||||||||||||||
C000103377_1_AdditionalIndexMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 10.73% | |||||||||||||||
C000103377_1_AdditionalIndexMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 4.46% | |||||||||||||||
C000103377_1_AdditionalIndexMember_10YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | ||||||||||||||||
C000195574_LG_ClassMember_8YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | Fidelity® SAI U.S. Value Index Fund</span>" id="sjs-D644"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® SAI U.S. Value Index Fund</span> | |||||||||||||||
C000195574_ClassMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000195574_ClassMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,367 | |||||||||||||||
C000195574_ClassMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,431 | |||||||||||||||
C000195574_ClassMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 9,375 | |||||||||||||||
C000195574_ClassMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,348 | |||||||||||||||
C000195574_ClassMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,044 | |||||||||||||||
C000195574_ClassMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,991 | |||||||||||||||
C000195574_ClassMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 17,716 | $ 17,716 | $ 17,716 | 17,716 | $ 17,716 | 17,716 | ||||||||||
C000195574_LG_1_AdditionalIndexMember_8YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | Fidelity U.S. Value Focus Index℠</span>" id="sjs-D671"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity U.S. Value Focus Index℠</span> | |||||||||||||||
C000195574_1_AdditionalIndexMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000195574_1_AdditionalIndexMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,382 | |||||||||||||||
C000195574_1_AdditionalIndexMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,441 | |||||||||||||||
C000195574_1_AdditionalIndexMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 9,377 | |||||||||||||||
C000195574_1_AdditionalIndexMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,369 | |||||||||||||||
C000195574_1_AdditionalIndexMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,083 | |||||||||||||||
C000195574_1_AdditionalIndexMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 15,064 | |||||||||||||||
C000195574_1_AdditionalIndexMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 17,800 | 17,800 | $ 17,800 | 17,800 | 17,800 | 17,800 | ||||||||||
C000195574_LG_2_AdditionalIndexMember_8YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | S&P 500® Index</span>" id="sjs-D698"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span> | |||||||||||||||
C000195574_2_AdditionalIndexMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000195574_2_AdditionalIndexMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,621 | |||||||||||||||
C000195574_2_AdditionalIndexMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 11,469 | |||||||||||||||
C000195574_2_AdditionalIndexMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 12,841 | |||||||||||||||
C000195574_2_AdditionalIndexMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 17,520 | |||||||||||||||
C000195574_2_AdditionalIndexMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 16,708 | |||||||||||||||
C000195574_2_AdditionalIndexMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 18,882 | |||||||||||||||
C000195574_2_AdditionalIndexMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 23,064 | $ 23,064 | $ 23,064 | $ 23,064 | 23,064 | 23,064 | ||||||||||
C000195574_NoLoadClassMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 18.17% | |||||||||||||||
C000195574_NoLoadClassMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 11.17% | |||||||||||||||
C000195574_NoLoadClassMember_2023-08-01_2024-07-31Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 9.02% | |||||||||||||||
C000195574_0_AdditionalIndexMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 18.16% | |||||||||||||||
C000195574_0_AdditionalIndexMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 11.26% | |||||||||||||||
C000195574_0_AdditionalIndexMember_LOCMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 9.10% | |||||||||||||||
C000163539_LG_ClassMember_9YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | Fidelity® SAI Real Estate Index Fund</span>" id="sjs-E743"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® SAI Real Estate Index Fund</span> | |||||||||||||||
C000163539_ClassMember_AsOf_2016Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000163539_ClassMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 12,152 | |||||||||||||||
C000163539_ClassMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 11,471 | |||||||||||||||
C000163539_ClassMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 11,915 | |||||||||||||||
C000163539_ClassMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,200 | |||||||||||||||
C000163539_ClassMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 11,083 | |||||||||||||||
C000163539_ClassMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 15,485 | |||||||||||||||
C000163539_ClassMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,829 | |||||||||||||||
C000163539_ClassMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 13,395 | $ 13,395 | 13,395 | $ 13,395 | 13,395 | 13,395 | ||||||||||
C000163539_LG_1_AdditionalIndexMember_9YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | Fidelity Real Estate Linked Index℠</span>" id="sjs-E773"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Real Estate Linked Index℠</span> | |||||||||||||||
C000163539_1_AdditionalIndexMember_AsOf_2016Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000163539_1_AdditionalIndexMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 12,170 | |||||||||||||||
C000163539_1_AdditionalIndexMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 11,482 | |||||||||||||||
C000163539_1_AdditionalIndexMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 11,924 | |||||||||||||||
C000163539_1_AdditionalIndexMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,223 | |||||||||||||||
C000163539_1_AdditionalIndexMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 11,068 | |||||||||||||||
C000163539_1_AdditionalIndexMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 15,495 | |||||||||||||||
C000163539_1_AdditionalIndexMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,841 | |||||||||||||||
C000163539_1_AdditionalIndexMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,408 | 13,408 | 13,408 | $ 13,408 | 13,408 | 13,408 | ||||||||||
C000163539_LG_2_AdditionalIndexMember_9YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | MSCI US IMI Real Estate 25/25 Index</span>" id="sjs-E803"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI US IMI Real Estate 25/25 Index</span> | |||||||||||||||
C000163539_2_AdditionalIndexMember_AsOf_2016Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000163539_2_AdditionalIndexMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 12,152 | |||||||||||||||
C000163539_2_AdditionalIndexMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 11,940 | |||||||||||||||
C000163539_2_AdditionalIndexMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 12,488 | |||||||||||||||
C000163539_2_AdditionalIndexMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 14,139 | |||||||||||||||
C000163539_2_AdditionalIndexMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,422 | |||||||||||||||
C000163539_2_AdditionalIndexMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 18,360 | |||||||||||||||
C000163539_2_AdditionalIndexMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 17,496 | |||||||||||||||
C000163539_2_AdditionalIndexMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 15,886 | $ 15,886 | 15,886 | $ 15,886 | 15,886 | 15,886 | ||||||||||
C000163539_NoLoadClassMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 10.30% | |||||||||||||||
C000163539_NoLoadClassMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 2.28% | |||||||||||||||
C000163539_NoLoadClassMember_2023-08-01_2024-07-31Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 4.70% | |||||||||||||||
C000163539_0_AdditionalIndexMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 10.73% | |||||||||||||||
C000163539_0_AdditionalIndexMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 2.34% | |||||||||||||||
C000163539_0_AdditionalIndexMember_LOCMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 4.76% | |||||||||||||||
C000163539_1_AdditionalIndexMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 10.73% | |||||||||||||||
C000163539_1_AdditionalIndexMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 4.46% | |||||||||||||||
C000163539_1_AdditionalIndexMember_LOCMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | ||||||||||||||||
C000163540_LG_ClassMember_9YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | Fidelity® SAI U.S. Large Cap Index Fund</span>" id="sjs-E860"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® SAI U.S. Large Cap Index Fund</span> | |||||||||||||||
C000163540_ClassMember_AsOf_2016Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 10,000 | |||||||||||||||
C000163540_ClassMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 11,550 | |||||||||||||||
C000163540_ClassMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 13,401 | |||||||||||||||
C000163540_ClassMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 15,574 | |||||||||||||||
C000163540_ClassMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 16,816 | |||||||||||||||
C000163540_ClassMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 18,807 | |||||||||||||||
C000163540_ClassMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 25,659 | |||||||||||||||
C000163540_ClassMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | 24,459 | |||||||||||||||
C000163540_ClassMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 27,635 | $ 27,635 | 27,635 | $ 27,635 | 27,635 | 27,635 | ||||||||||
C000163540_LG_1_AdditionalIndexMember_9YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Line Graph and Table Measure Name | S&P 500® Index</span>" id="sjs-E890"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span> | |||||||||||||||
C000163540_1_AdditionalIndexMember_AsOf_2016Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 10,000 | |||||||||||||||
C000163540_1_AdditionalIndexMember_AsOf_2017Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 11,549 | |||||||||||||||
C000163540_1_AdditionalIndexMember_AsOf_2018Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 13,402 | |||||||||||||||
C000163540_1_AdditionalIndexMember_AsOf_2019Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 15,579 | |||||||||||||||
C000163540_1_AdditionalIndexMember_AsOf_2020Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 16,823 | |||||||||||||||
C000163540_1_AdditionalIndexMember_AsOf_2021Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 18,834 | |||||||||||||||
C000163540_1_AdditionalIndexMember_AsOf_2022Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 25,699 | |||||||||||||||
C000163540_1_AdditionalIndexMember_AsOf_2023Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 24,506 | |||||||||||||||
C000163540_1_AdditionalIndexMember_AsOf_2024Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Account Value | $ 27,696 | $ 27,696 | $ 27,696 | $ 27,696 | $ 27,696 | $ 27,696 | ||||||||||
C000163540_NoLoadClassMember_1YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 22.14% | |||||||||||||||
C000163540_NoLoadClassMember_5YRMember | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 14.95% | |||||||||||||||
C000163540_NoLoadClassMember_2023-08-01_2024-07-31Member | ||||||||||||||||
Account Value [Line Items] | ||||||||||||||||
Average Annual Return, Percent | 15.39% |
Shareholder Report, Holdings (D
Shareholder Report, Holdings (Details) | Jul. 31, 2024 |
Fidelity SAI U.S. Quality Index Fund | TH0Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 9.70% |
Fidelity SAI U.S. Quality Index Fund | TH1Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 8.60% |
Fidelity SAI U.S. Quality Index Fund | TH2Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 6.50% |
Fidelity SAI U.S. Quality Index Fund | TH3Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 4.90% |
Fidelity SAI U.S. Quality Index Fund | TH4Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 4.10% |
Fidelity SAI U.S. Quality Index Fund | TH5Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 4% |
Fidelity SAI U.S. Quality Index Fund | TH6Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.80% |
Fidelity SAI U.S. Quality Index Fund | TH7Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.70% |
Fidelity SAI U.S. Quality Index Fund | TH8Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.60% |
Fidelity SAI U.S. Quality Index Fund | TH9Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.40% |
Fidelity SAI U.S. Quality Index Fund | MSFinancialsSectorMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 10.80% |
Fidelity SAI U.S. Quality Index Fund | Information Technology Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 41% |
Fidelity SAI U.S. Quality Index Fund | Healthcare Sector | |
Holdings [Line Items] | |
Percent of Net Asset Value | 15.10% |
Fidelity SAI U.S. Quality Index Fund | Real Estate Sector | |
Holdings [Line Items] | |
Percent of Net Asset Value | 1.10% |
Fidelity SAI U.S. Quality Index Fund | Industrial Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 7% |
Fidelity SAI U.S. Quality Index Fund | Materials Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.10% |
Fidelity SAI U.S. Quality Index Fund | Consumer Discretionary Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 5.80% |
Fidelity SAI U.S. Quality Index Fund | Consumer Staples Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 6.80% |
Fidelity SAI U.S. Quality Index Fund | Communications Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 11.90% |
Fidelity SAI U.S. Quality Index Fund | Energy Sector | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.20% |
Fidelity SAI U.S. Quality Index Fund | United States | |
Holdings [Line Items] | |
Percent of Net Asset Value | 99.80% |
Fidelity SAI U.S. Quality Index Fund | Israel | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.20% |
Fidelity SAI U.S. Quality Index Fund | AACommonStocksMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 99.80% |
Fidelity SAI U.S. Quality Index Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.20% |
Fidelity SAI Small-Mid Cap 500 Index Fund | TH0Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.70% |
Fidelity SAI Small-Mid Cap 500 Index Fund | TH1Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.60% |
Fidelity SAI Small-Mid Cap 500 Index Fund | TH2Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.50% |
Fidelity SAI Small-Mid Cap 500 Index Fund | TH3Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.50% |
Fidelity SAI Small-Mid Cap 500 Index Fund | TH4Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.50% |
Fidelity SAI Small-Mid Cap 500 Index Fund | TH5Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.50% |
Fidelity SAI Small-Mid Cap 500 Index Fund | TH6Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.50% |
Fidelity SAI Small-Mid Cap 500 Index Fund | TH7Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.50% |
Fidelity SAI Small-Mid Cap 500 Index Fund | TH8Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.50% |
Fidelity SAI Small-Mid Cap 500 Index Fund | TH9Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.40% |
Fidelity SAI Small-Mid Cap 500 Index Fund | MSFinancialsSectorMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 15.90% |
Fidelity SAI Small-Mid Cap 500 Index Fund | Information Technology Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 11% |
Fidelity SAI Small-Mid Cap 500 Index Fund | Healthcare Sector | |
Holdings [Line Items] | |
Percent of Net Asset Value | 9.50% |
Fidelity SAI Small-Mid Cap 500 Index Fund | Real Estate Sector | |
Holdings [Line Items] | |
Percent of Net Asset Value | 7.50% |
Fidelity SAI Small-Mid Cap 500 Index Fund | Industrial Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 20.40% |
Fidelity SAI Small-Mid Cap 500 Index Fund | Materials Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 6.90% |
Fidelity SAI Small-Mid Cap 500 Index Fund | Consumer Discretionary Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 14.30% |
Fidelity SAI Small-Mid Cap 500 Index Fund | Consumer Staples Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.90% |
Fidelity SAI Small-Mid Cap 500 Index Fund | Communications Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.40% |
Fidelity SAI Small-Mid Cap 500 Index Fund | Energy Sector | |
Holdings [Line Items] | |
Percent of Net Asset Value | 5.10% |
Fidelity SAI Small-Mid Cap 500 Index Fund | Utilities Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.10% |
Fidelity SAI Small-Mid Cap 500 Index Fund | United States | |
Holdings [Line Items] | |
Percent of Net Asset Value | 98.50% |
Fidelity SAI Small-Mid Cap 500 Index Fund | United Kingdom | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.40% |
Fidelity SAI Small-Mid Cap 500 Index Fund | Bermuda | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.30% |
Fidelity SAI Small-Mid Cap 500 Index Fund | Puerto Rico | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.20% |
Fidelity SAI Small-Mid Cap 500 Index Fund | Brazil | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.20% |
Fidelity SAI Small-Mid Cap 500 Index Fund | Belgium | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.20% |
Fidelity SAI Small-Mid Cap 500 Index Fund | Luxembourg | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.10% |
Fidelity SAI Small-Mid Cap 500 Index Fund | Japan | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.10% |
Fidelity SAI Small-Mid Cap 500 Index Fund | Finland | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0% |
Fidelity SAI Small-Mid Cap 500 Index Fund | AACommonStocksMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 100% |
Fidelity SAI Small-Mid Cap 500 Index Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0% |
Fidelity SAI U.S. Momentum Index Fund | TH0Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 5.20% |
Fidelity SAI U.S. Momentum Index Fund | TH1Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 5.20% |
Fidelity SAI U.S. Momentum Index Fund | TH2Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 5.10% |
Fidelity SAI U.S. Momentum Index Fund | TH3Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 4.90% |
Fidelity SAI U.S. Momentum Index Fund | TH4Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 4.70% |
Fidelity SAI U.S. Momentum Index Fund | TH5Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.80% |
Fidelity SAI U.S. Momentum Index Fund | TH6Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.20% |
Fidelity SAI U.S. Momentum Index Fund | TH7Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.20% |
Fidelity SAI U.S. Momentum Index Fund | TH8Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.30% |
Fidelity SAI U.S. Momentum Index Fund | TH9Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 1.90% |
Fidelity SAI U.S. Momentum Index Fund | MSFinancialsSectorMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 15.40% |
Fidelity SAI U.S. Momentum Index Fund | Information Technology Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 30.90% |
Fidelity SAI U.S. Momentum Index Fund | Healthcare Sector | |
Holdings [Line Items] | |
Percent of Net Asset Value | 9.80% |
Fidelity SAI U.S. Momentum Index Fund | Real Estate Sector | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.30% |
Fidelity SAI U.S. Momentum Index Fund | Industrial Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 15.20% |
Fidelity SAI U.S. Momentum Index Fund | Materials Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 1.40% |
Fidelity SAI U.S. Momentum Index Fund | Consumer Discretionary Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 10% |
Fidelity SAI U.S. Momentum Index Fund | Consumer Staples Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 4.10% |
Fidelity SAI U.S. Momentum Index Fund | Communications Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 10.40% |
Fidelity SAI U.S. Momentum Index Fund | Energy Sector | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.90% |
Fidelity SAI U.S. Momentum Index Fund | Utilities Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 1.50% |
Fidelity SAI U.S. Momentum Index Fund | United States | |
Holdings [Line Items] | |
Percent of Net Asset Value | 99.70% |
Fidelity SAI U.S. Momentum Index Fund | Brazil | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.10% |
Fidelity SAI U.S. Momentum Index Fund | China | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.20% |
Fidelity SAI U.S. Momentum Index Fund | AACommonStocksMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 99.90% |
Fidelity SAI U.S. Momentum Index Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.10% |
Fidelity Real Estate Index Fund | TH0Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 8.10% |
Fidelity Real Estate Index Fund | TH1Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 7.20% |
Fidelity Real Estate Index Fund | TH2Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 5.30% |
Fidelity Real Estate Index Fund | TH3Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 4.50% |
Fidelity Real Estate Index Fund | TH4Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.60% |
Fidelity Real Estate Index Fund | TH5Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.40% |
Fidelity Real Estate Index Fund | TH6Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.40% |
Fidelity Real Estate Index Fund | TH7Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.20% |
Fidelity Real Estate Index Fund | TH8Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.20% |
Fidelity Real Estate Index Fund | TH9Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.40% |
Fidelity Real Estate Index Fund | TI0Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 36% |
Fidelity Real Estate Index Fund | TI1Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 13.10% |
Fidelity Real Estate Index Fund | TI2Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 12.80% |
Fidelity Real Estate Index Fund | TI3Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 11.80% |
Fidelity Real Estate Index Fund | TI4Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 10.60% |
Fidelity Real Estate Index Fund | TI5Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 7.60% |
Fidelity Real Estate Index Fund | TI6Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.30% |
Fidelity Real Estate Index Fund | TI7Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.50% |
Fidelity Real Estate Index Fund | TI8Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 1.90% |
Fidelity Real Estate Index Fund | United States | |
Holdings [Line Items] | |
Percent of Net Asset Value | 100% |
Fidelity Real Estate Index Fund | AACommonStocksMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 99.60% |
Fidelity Real Estate Index Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.40% |
Fidelity SAI U.S. Value Index Fund | TH0Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.80% |
Fidelity SAI U.S. Value Index Fund | TH1Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.80% |
Fidelity SAI U.S. Value Index Fund | TH2Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.50% |
Fidelity SAI U.S. Value Index Fund | TH3Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.30% |
Fidelity SAI U.S. Value Index Fund | TH4Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.20% |
Fidelity SAI U.S. Value Index Fund | TH5Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.20% |
Fidelity SAI U.S. Value Index Fund | TH6Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.80% |
Fidelity SAI U.S. Value Index Fund | TH7Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.70% |
Fidelity SAI U.S. Value Index Fund | TH8Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.60% |
Fidelity SAI U.S. Value Index Fund | TH9Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.40% |
Fidelity SAI U.S. Value Index Fund | MSFinancialsSectorMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 23.10% |
Fidelity SAI U.S. Value Index Fund | Information Technology Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 20.70% |
Fidelity SAI U.S. Value Index Fund | Healthcare Sector | |
Holdings [Line Items] | |
Percent of Net Asset Value | 12.90% |
Fidelity SAI U.S. Value Index Fund | Real Estate Sector | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.40% |
Fidelity SAI U.S. Value Index Fund | Industrial Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 5.40% |
Fidelity SAI U.S. Value Index Fund | Materials Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 5.30% |
Fidelity SAI U.S. Value Index Fund | Consumer Discretionary Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 5.90% |
Fidelity SAI U.S. Value Index Fund | Consumer Staples Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.70% |
Fidelity SAI U.S. Value Index Fund | Communications Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 8.60% |
Fidelity SAI U.S. Value Index Fund | Energy Sector | |
Holdings [Line Items] | |
Percent of Net Asset Value | 13.30% |
Fidelity SAI U.S. Value Index Fund | Utilities Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.20% |
Fidelity SAI U.S. Value Index Fund | United States | |
Holdings [Line Items] | |
Percent of Net Asset Value | 99.20% |
Fidelity SAI U.S. Value Index Fund | Bermuda | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.20% |
Fidelity SAI U.S. Value Index Fund | China | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.20% |
Fidelity SAI U.S. Value Index Fund | Ireland | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.20% |
Fidelity SAI U.S. Value Index Fund | Peru | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.20% |
Fidelity SAI U.S. Value Index Fund | AACommonStocksMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 99.50% |
Fidelity SAI U.S. Value Index Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.50% |
Fidelity SAI Real Estate Index Fund | TH0Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 8% |
Fidelity SAI Real Estate Index Fund | TH1Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 7.10% |
Fidelity SAI Real Estate Index Fund | TH2Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 5.20% |
Fidelity SAI Real Estate Index Fund | TH3Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 4.30% |
Fidelity SAI Real Estate Index Fund | TH4Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.50% |
Fidelity SAI Real Estate Index Fund | TH5Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.40% |
Fidelity SAI Real Estate Index Fund | TH6Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.30% |
Fidelity SAI Real Estate Index Fund | TH7Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.20% |
Fidelity SAI Real Estate Index Fund | TH8Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.20% |
Fidelity SAI Real Estate Index Fund | TH9Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.40% |
Fidelity SAI Real Estate Index Fund | TI0Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 35.60% |
Fidelity SAI Real Estate Index Fund | TI1Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 13% |
Fidelity SAI Real Estate Index Fund | TI2Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 12.60% |
Fidelity SAI Real Estate Index Fund | TI3Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 11.70% |
Fidelity SAI Real Estate Index Fund | TI4Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 10.40% |
Fidelity SAI Real Estate Index Fund | TI5Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 7.50% |
Fidelity SAI Real Estate Index Fund | TI6Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.30% |
Fidelity SAI Real Estate Index Fund | TI7Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.40% |
Fidelity SAI Real Estate Index Fund | TI8Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2% |
Fidelity SAI Real Estate Index Fund | United States | |
Holdings [Line Items] | |
Percent of Net Asset Value | 100% |
Fidelity SAI Real Estate Index Fund | AACommonStocksMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 98.50% |
Fidelity SAI Real Estate Index Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 1.50% |
Fidelity SAI U.S. Large Cap Index Fund | TH0Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 6.90% |
Fidelity SAI U.S. Large Cap Index Fund | TH1Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 6.70% |
Fidelity SAI U.S. Large Cap Index Fund | TH2Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 6.30% |
Fidelity SAI U.S. Large Cap Index Fund | TH3Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.70% |
Fidelity SAI U.S. Large Cap Index Fund | TH4Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.20% |
Fidelity SAI U.S. Large Cap Index Fund | TH5Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.20% |
Fidelity SAI U.S. Large Cap Index Fund | TH6Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 1.80% |
Fidelity SAI U.S. Large Cap Index Fund | TH7Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 1.80% |
Fidelity SAI U.S. Large Cap Index Fund | TH8Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 1.60% |
Fidelity SAI U.S. Large Cap Index Fund | TH9Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 1.40% |
Fidelity SAI U.S. Large Cap Index Fund | MSFinancialsSectorMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 13% |
Fidelity SAI U.S. Large Cap Index Fund | Information Technology Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 31.30% |
Fidelity SAI U.S. Large Cap Index Fund | Healthcare Sector | |
Holdings [Line Items] | |
Percent of Net Asset Value | 11.80% |
Fidelity SAI U.S. Large Cap Index Fund | Real Estate Sector | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.30% |
Fidelity SAI U.S. Large Cap Index Fund | Industrial Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 8.40% |
Fidelity SAI U.S. Large Cap Index Fund | Materials Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.20% |
Fidelity SAI U.S. Large Cap Index Fund | Consumer Discretionary Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 10% |
Fidelity SAI U.S. Large Cap Index Fund | Consumer Staples Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 5.80% |
Fidelity SAI U.S. Large Cap Index Fund | Communications Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 8.80% |
Fidelity SAI U.S. Large Cap Index Fund | Energy Sector | |
Holdings [Line Items] | |
Percent of Net Asset Value | 3.70% |
Fidelity SAI U.S. Large Cap Index Fund | Utilities Sector Member | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.40% |
Fidelity SAI U.S. Large Cap Index Fund | United States | |
Holdings [Line Items] | |
Percent of Net Asset Value | 99.50% |
Fidelity SAI U.S. Large Cap Index Fund | China | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.10% |
Fidelity SAI U.S. Large Cap Index Fund | Ireland | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.40% |
Fidelity SAI U.S. Large Cap Index Fund | AACommonStocksMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 99.70% |
Fidelity SAI U.S. Large Cap Index Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.30% |