| Form N-CSR Cover | 6 Months Ended |
| Nov. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Fidelity Summer Street Trust |
| Entity Central Index Key | 0000225322 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Nov. 30, 2024 |
| Shareholder Report | 6 Months Ended |
| Nov. 30, 2024 USD ($) shares | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Fidelity Summer Street Trust |
| Entity Central Index Key | 0000225322 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Nov. 30, 2024 |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Sustainable U.S. Equity Fund |
| Class Name | Fidelity Advisor® Sustainable U.S. Equity Fund Class I |
| Trading Symbol | FSEQX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Sustainable U.S. Equity Fund for the period June 1, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| 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 six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $ 0.90 % |
| Expenses Paid, Amount | $ 48 |
| Expense Ratio, Percent | 0.90% |
| Net Assets | $ 29,599,091 |
| Holdings Count | shares | 68 |
| Investment Company Portfolio Turnover | 35% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 68 Portfolio Turnover 35 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 29.1 Financials 12.5 Health Care 10.7 Consumer Discretionary 10.7 Industrials 9.5 Communication Services 7.6 Consumer Staples 4.7 Energy 4.6 Materials 4.2 Utilities 2.4 Real Estate 2.1 Common Stocks 98.0 Preferred Stocks 0.1 Short-Term Investments and Net Other Assets (Liabilities) 1.9 ASSET ALLOCATION (% of Fund's net assets) United States 96.0 Norway 1.3 France 1.0 Italy 0.8 Ireland 0.5 China 0.4 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Apple Inc 7.5 NVIDIA Corp 6.4 Microsoft Corp 6.0 Alphabet Inc Class A 4.1 Amazon.com Inc 3.5 Procter & Gamble Co/The 3.0 Moody's Corp 2.7 Salesforce Inc 2.6 American Express Co 2.5 Cigna Group/The 2.2 40.5 |
| Fidelity Water Sustainability Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Water Sustainability Fund |
| Class Name | Fidelity® Water Sustainability Fund |
| Trading Symbol | FLOWX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Water Sustainability Fund for the period June 1, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Water Sustainability Fund $ 0.91 % |
| Expenses Paid, Amount | $ 47 |
| Expense Ratio, Percent | 0.91% |
| Net Assets | $ 111,212,814 |
| Holdings Count | shares | 37 |
| Investment Company Portfolio Turnover | 53% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 37 Portfolio Turnover 53 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Industrials 57.7 Utilities 34.2 Information Technology 2.7 Materials 2.4 Energy 0.8 Common Stocks 97.8 Short-Term Investments and Net Other Assets (Liabilities) 2.2 ASSET ALLOCATION (% of Fund's net assets) United States 68.2 United Kingdom 15.4 Switzerland 5.2 France 4.5 Brazil 3.4 Japan 2.6 Italy 0.7 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Pentair PLC 8.7 United Utilities Group PLC 7.6 Severn Trent PLC 6.8 Essential Utilities Inc 6.1 Core & Main Inc Class A 5.2 Chart Industries Inc 5.0 American Water Works Co Inc 4.8 Ingersoll Rand Inc 4.6 Advanced Drainage Systems Inc 4.6 Veolia Environnement SA 4.5 57.9 |
| Fidelity Advisor Climate Action Fund - Class I | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Climate Action Fund |
| Class Name | Fidelity Advisor® Climate Action Fund Class I |
| Trading Symbol | FCAUX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Climate Action Fund for the period June 1, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| 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 six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $ 1.05 % |
| Expenses Paid, Amount | $ 55 |
| Expense Ratio, Percent | 1.05% |
| Net Assets | $ 39,156,711 |
| Holdings Count | shares | 98 |
| Investment Company Portfolio Turnover | 43% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 98 Portfolio Turnover 43 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 34.0 Industrials 18.5 Financials 13.0 Consumer Discretionary 12.6 Health Care 9.9 Communication Services 4.3 Consumer Staples 2.9 Materials 2.8 Energy 0.9 Utilities 0.3 Common Stocks 99.2 Preferred Securities 0.0 Preferred Stocks 0.0 Short-Term Investments and Net Other Assets (Liabilities) 0.8 ASSET ALLOCATION (% of Fund's net assets) United States 90.0 China 1.6 Ireland 1.2 Switzerland 1.1 Denmark 1.1 Brazil 0.8 United Kingdom 0.7 Hong Kong 0.7 Canada 0.6 Others 2.2 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) NVIDIA Corp 6.1 Apple Inc 5.6 Microsoft Corp 5.1 Alphabet Inc Class A 4.3 Moody's Corp 2.5 Tesla Inc 2.3 Lowe's Cos Inc 2.1 Morgan Stanley 2.0 Eaton Corp PLC 1.9 Deere & Co 1.8 33.7 |
| Fidelity Climate Action Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Climate Action Fund |
| Class Name | Fidelity® Climate Action Fund |
| Trading Symbol | FCAEX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Climate Action Fund for the period June 1, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Climate Action Fund $ 1.05 % |
| Expenses Paid, Amount | $ 55 |
| Expense Ratio, Percent | 1.05% |
| Net Assets | $ 39,156,711 |
| Holdings Count | shares | 98 |
| Investment Company Portfolio Turnover | 43% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 98 Portfolio Turnover 43 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 34.0 Industrials 18.5 Financials 13.0 Consumer Discretionary 12.6 Health Care 9.9 Communication Services 4.3 Consumer Staples 2.9 Materials 2.8 Energy 0.9 Utilities 0.3 Common Stocks 99.2 Preferred Securities 0.0 Preferred Stocks 0.0 Short-Term Investments and Net Other Assets (Liabilities) 0.8 ASSET ALLOCATION (% of Fund's net assets) United States 90.0 China 1.6 Ireland 1.2 Switzerland 1.1 Denmark 1.1 Brazil 0.8 United Kingdom 0.7 Hong Kong 0.7 Canada 0.6 Others 2.2 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) NVIDIA Corp 6.1 Apple Inc 5.6 Microsoft Corp 5.1 Alphabet Inc Class A 4.3 Moody's Corp 2.5 Tesla Inc 2.3 Lowe's Cos Inc 2.1 Morgan Stanley 2.0 Eaton Corp PLC 1.9 Deere & Co 1.8 33.7 |
| Fidelity Advisor Climate Action Fund - Class C | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Climate Action Fund |
| Class Name | Fidelity Advisor® Climate Action Fund Class C |
| Trading Symbol | FCALX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Climate Action Fund for the period June 1, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| 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 six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $ 2.05 % |
| Expenses Paid, Amount | $ 108 |
| Expense Ratio, Percent | 2.05% |
| Net Assets | $ 39,156,711 |
| Holdings Count | shares | 98 |
| Investment Company Portfolio Turnover | 43% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 98 Portfolio Turnover 43 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 34.0 Industrials 18.5 Financials 13.0 Consumer Discretionary 12.6 Health Care 9.9 Communication Services 4.3 Consumer Staples 2.9 Materials 2.8 Energy 0.9 Utilities 0.3 Common Stocks 99.2 Preferred Securities 0.0 Preferred Stocks 0.0 Short-Term Investments and Net Other Assets (Liabilities) 0.8 ASSET ALLOCATION (% of Fund's net assets) United States 90.0 China 1.6 Ireland 1.2 Switzerland 1.1 Denmark 1.1 Brazil 0.8 United Kingdom 0.7 Hong Kong 0.7 Canada 0.6 Others 2.2 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) NVIDIA Corp 6.1 Apple Inc 5.6 Microsoft Corp 5.1 Alphabet Inc Class A 4.3 Moody's Corp 2.5 Tesla Inc 2.3 Lowe's Cos Inc 2.1 Morgan Stanley 2.0 Eaton Corp PLC 1.9 Deere & Co 1.8 33.7 |
| Fidelity Sustainable U.S. Equity Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Sustainable U.S. Equity Fund |
| Class Name | Fidelity® Sustainable U.S. Equity Fund |
| Trading Symbol | FSEBX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Sustainable U.S. Equity Fund for the period June 1, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Sustainable U.S. Equity Fund $ 0.90 % |
| Expenses Paid, Amount | $ 48 |
| Expense Ratio, Percent | 0.90% |
| Net Assets | $ 29,599,091 |
| Holdings Count | shares | 68 |
| Investment Company Portfolio Turnover | 35% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 68 Portfolio Turnover 35 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 29.1 Financials 12.5 Health Care 10.7 Consumer Discretionary 10.7 Industrials 9.5 Communication Services 7.6 Consumer Staples 4.7 Energy 4.6 Materials 4.2 Utilities 2.4 Real Estate 2.1 Common Stocks 98.0 Preferred Stocks 0.1 Short-Term Investments and Net Other Assets (Liabilities) 1.9 ASSET ALLOCATION (% of Fund's net assets) United States 96.0 Norway 1.3 France 1.0 Italy 0.8 Ireland 0.5 China 0.4 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Apple Inc 7.5 NVIDIA Corp 6.4 Microsoft Corp 6.0 Alphabet Inc Class A 4.1 Amazon.com Inc 3.5 Procter & Gamble Co/The 3.0 Moody's Corp 2.7 Salesforce Inc 2.6 American Express Co 2.5 Cigna Group/The 2.2 40.5 |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Sustainable U.S. Equity Fund |
| Class Name | Fidelity Advisor® Sustainable U.S. Equity Fund Class A |
| Trading Symbol | FSEKX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Sustainable U.S. Equity Fund for the period June 1, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| 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 six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $ 1.15 % |
| Expenses Paid, Amount | $ 61 |
| Expense Ratio, Percent | 1.15% |
| Net Assets | $ 29,599,091 |
| Holdings Count | shares | 68 |
| Investment Company Portfolio Turnover | 35% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 68 Portfolio Turnover 35 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 29.1 Financials 12.5 Health Care 10.7 Consumer Discretionary 10.7 Industrials 9.5 Communication Services 7.6 Consumer Staples 4.7 Energy 4.6 Materials 4.2 Utilities 2.4 Real Estate 2.1 Common Stocks 98.0 Preferred Stocks 0.1 Short-Term Investments and Net Other Assets (Liabilities) 1.9 ASSET ALLOCATION (% of Fund's net assets) United States 96.0 Norway 1.3 France 1.0 Italy 0.8 Ireland 0.5 China 0.4 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Apple Inc 7.5 NVIDIA Corp 6.4 Microsoft Corp 6.0 Alphabet Inc Class A 4.1 Amazon.com Inc 3.5 Procter & Gamble Co/The 3.0 Moody's Corp 2.7 Salesforce Inc 2.6 American Express Co 2.5 Cigna Group/The 2.2 40.5 |
| Fidelity Advisor Climate Action Fund - Class A | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Climate Action Fund |
| Class Name | Fidelity Advisor® Climate Action Fund Class A |
| Trading Symbol | FCAJX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Climate Action Fund for the period June 1, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| 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 six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $ 1.30 % |
| Expenses Paid, Amount | $ 68 |
| Expense Ratio, Percent | 1.30% |
| Net Assets | $ 39,156,711 |
| Holdings Count | shares | 98 |
| Investment Company Portfolio Turnover | 43% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 98 Portfolio Turnover 43 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 34.0 Industrials 18.5 Financials 13.0 Consumer Discretionary 12.6 Health Care 9.9 Communication Services 4.3 Consumer Staples 2.9 Materials 2.8 Energy 0.9 Utilities 0.3 Common Stocks 99.2 Preferred Securities 0.0 Preferred Stocks 0.0 Short-Term Investments and Net Other Assets (Liabilities) 0.8 ASSET ALLOCATION (% of Fund's net assets) United States 90.0 China 1.6 Ireland 1.2 Switzerland 1.1 Denmark 1.1 Brazil 0.8 United Kingdom 0.7 Hong Kong 0.7 Canada 0.6 Others 2.2 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) NVIDIA Corp 6.1 Apple Inc 5.6 Microsoft Corp 5.1 Alphabet Inc Class A 4.3 Moody's Corp 2.5 Tesla Inc 2.3 Lowe's Cos Inc 2.1 Morgan Stanley 2.0 Eaton Corp PLC 1.9 Deere & Co 1.8 33.7 |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Sustainable U.S. Equity Fund |
| Class Name | Fidelity Advisor® Sustainable U.S. Equity Fund Class Z |
| Trading Symbol | FSEWX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Sustainable U.S. Equity Fund for the period June 1, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| 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 six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class Z $ 0.75 % |
| Expenses Paid, Amount | $ 40 |
| Expense Ratio, Percent | 0.75% |
| Net Assets | $ 29,599,091 |
| Holdings Count | shares | 68 |
| Investment Company Portfolio Turnover | 35% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 68 Portfolio Turnover 35 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 29.1 Financials 12.5 Health Care 10.7 Consumer Discretionary 10.7 Industrials 9.5 Communication Services 7.6 Consumer Staples 4.7 Energy 4.6 Materials 4.2 Utilities 2.4 Real Estate 2.1 Common Stocks 98.0 Preferred Stocks 0.1 Short-Term Investments and Net Other Assets (Liabilities) 1.9 ASSET ALLOCATION (% of Fund's net assets) United States 96.0 Norway 1.3 France 1.0 Italy 0.8 Ireland 0.5 China 0.4 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Apple Inc 7.5 NVIDIA Corp 6.4 Microsoft Corp 6.0 Alphabet Inc Class A 4.1 Amazon.com Inc 3.5 Procter & Gamble Co/The 3.0 Moody's Corp 2.7 Salesforce Inc 2.6 American Express Co 2.5 Cigna Group/The 2.2 40.5 |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Sustainable U.S. Equity Fund |
| Class Name | Fidelity Advisor® Sustainable U.S. Equity Fund Class C |
| Trading Symbol | FSEOX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Sustainable U.S. Equity Fund for the period June 1, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| 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 six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $ 1.90 % |
| Expenses Paid, Amount | $ 101 |
| Expense Ratio, Percent | 1.90% |
| Net Assets | $ 29,599,091 |
| Holdings Count | shares | 68 |
| Investment Company Portfolio Turnover | 35% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 68 Portfolio Turnover 35 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 29.1 Financials 12.5 Health Care 10.7 Consumer Discretionary 10.7 Industrials 9.5 Communication Services 7.6 Consumer Staples 4.7 Energy 4.6 Materials 4.2 Utilities 2.4 Real Estate 2.1 Common Stocks 98.0 Preferred Stocks 0.1 Short-Term Investments and Net Other Assets (Liabilities) 1.9 ASSET ALLOCATION (% of Fund's net assets) United States 96.0 Norway 1.3 France 1.0 Italy 0.8 Ireland 0.5 China 0.4 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Apple Inc 7.5 NVIDIA Corp 6.4 Microsoft Corp 6.0 Alphabet Inc Class A 4.1 Amazon.com Inc 3.5 Procter & Gamble Co/The 3.0 Moody's Corp 2.7 Salesforce Inc 2.6 American Express Co 2.5 Cigna Group/The 2.2 40.5 |
| Fidelity Advisor Climate Action Fund - Class M | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Climate Action Fund |
| Class Name | Fidelity Advisor® Climate Action Fund Class M |
| Trading Symbol | FCAOX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Climate Action Fund for the period June 1, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| 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 six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class M $ 1.55 % |
| Expenses Paid, Amount | $ 82 |
| Expense Ratio, Percent | 1.55% |
| Net Assets | $ 39,156,711 |
| Holdings Count | shares | 98 |
| Investment Company Portfolio Turnover | 43% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 98 Portfolio Turnover 43 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 34.0 Industrials 18.5 Financials 13.0 Consumer Discretionary 12.6 Health Care 9.9 Communication Services 4.3 Consumer Staples 2.9 Materials 2.8 Energy 0.9 Utilities 0.3 Common Stocks 99.2 Preferred Securities 0.0 Preferred Stocks 0.0 Short-Term Investments and Net Other Assets (Liabilities) 0.8 ASSET ALLOCATION (% of Fund's net assets) United States 90.0 China 1.6 Ireland 1.2 Switzerland 1.1 Denmark 1.1 Brazil 0.8 United Kingdom 0.7 Hong Kong 0.7 Canada 0.6 Others 2.2 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) NVIDIA Corp 6.1 Apple Inc 5.6 Microsoft Corp 5.1 Alphabet Inc Class A 4.3 Moody's Corp 2.5 Tesla Inc 2.3 Lowe's Cos Inc 2.1 Morgan Stanley 2.0 Eaton Corp PLC 1.9 Deere & Co 1.8 33.7 |
| Fidelity Agricultural Productivity Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Agricultural Productivity Fund |
| Class Name | Fidelity® Agricultural Productivity Fund |
| Trading Symbol | FARMX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Agricultural Productivity Fund for the period June 1, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Agricultural Productivity Fund $ 0.95 % |
| Expenses Paid, Amount | $ 49 |
| Expense Ratio, Percent | 0.95% |
| Net Assets | $ 44,426,470 |
| Holdings Count | shares | 29 |
| Investment Company Portfolio Turnover | 8% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 29 Portfolio Turnover 8 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Consumer Staples 36.7 Industrials 31.3 Materials 29.8 Health Care 0.3 Common Stocks 98.1 Short-Term Investments and Net Other Assets (Liabilities) 1.9 ASSET ALLOCATION (% of Fund's net assets) United States 78.6 Canada 7.1 United Kingdom 3.8 Faroe Islands 2.8 Saudi Arabia 1.8 Japan 1.3 Indonesia 1.1 Ireland 1.0 Brazil 0.9 Others 1.6 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Deere & Co 24.8 Corteva Inc 11.0 Nutrien Ltd 7.1 Archer-Daniels-Midland Co 6.0 CF Industries Holdings Inc 4.9 Ingredion Inc 4.9 Lamb Weston Holdings Inc 4.9 Bunge Global SA 4.4 Cranswick PLC 3.8 Toro Co/The 3.7 75.5 |
| Fidelity Advisor Climate Action Fund - Class Z | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Climate Action Fund |
| Class Name | Fidelity Advisor® Climate Action Fund Class Z |
| Trading Symbol | FCLZX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Climate Action Fund for the period June 1, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| 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 six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class Z $ 0.90 % |
| Expenses Paid, Amount | $ 47 |
| Expense Ratio, Percent | 0.90% |
| Net Assets | $ 39,156,711 |
| Holdings Count | shares | 98 |
| Investment Company Portfolio Turnover | 43% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 98 Portfolio Turnover 43 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 34.0 Industrials 18.5 Financials 13.0 Consumer Discretionary 12.6 Health Care 9.9 Communication Services 4.3 Consumer Staples 2.9 Materials 2.8 Energy 0.9 Utilities 0.3 Common Stocks 99.2 Preferred Securities 0.0 Preferred Stocks 0.0 Short-Term Investments and Net Other Assets (Liabilities) 0.8 ASSET ALLOCATION (% of Fund's net assets) United States 90.0 China 1.6 Ireland 1.2 Switzerland 1.1 Denmark 1.1 Brazil 0.8 United Kingdom 0.7 Hong Kong 0.7 Canada 0.6 Others 2.2 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) NVIDIA Corp 6.1 Apple Inc 5.6 Microsoft Corp 5.1 Alphabet Inc Class A 4.3 Moody's Corp 2.5 Tesla Inc 2.3 Lowe's Cos Inc 2.1 Morgan Stanley 2.0 Eaton Corp PLC 1.9 Deere & Co 1.8 33.7 |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Sustainable U.S. Equity Fund |
| Class Name | Fidelity Advisor® Sustainable U.S. Equity Fund Class M |
| Trading Symbol | FSEPX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Sustainable U.S. Equity Fund for the period June 1, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| 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 six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class M $ 1.40 % |
| Expenses Paid, Amount | $ 74 |
| Expense Ratio, Percent | 1.40% |
| Net Assets | $ 29,599,091 |
| Holdings Count | shares | 68 |
| Investment Company Portfolio Turnover | 35% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 68 Portfolio Turnover 35 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 29.1 Financials 12.5 Health Care 10.7 Consumer Discretionary 10.7 Industrials 9.5 Communication Services 7.6 Consumer Staples 4.7 Energy 4.6 Materials 4.2 Utilities 2.4 Real Estate 2.1 Common Stocks 98.0 Preferred Stocks 0.1 Short-Term Investments and Net Other Assets (Liabilities) 1.9 ASSET ALLOCATION (% of Fund's net assets) United States 96.0 Norway 1.3 France 1.0 Italy 0.8 Ireland 0.5 China 0.4 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Apple Inc 7.5 NVIDIA Corp 6.4 Microsoft Corp 6.0 Alphabet Inc Class A 4.1 Amazon.com Inc 3.5 Procter & Gamble Co/The 3.0 Moody's Corp 2.7 Salesforce Inc 2.6 American Express Co 2.5 Cigna Group/The 2.2 40.5 |
| Fidelity SAI Sustainable U.S. Equity Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® SAI Sustainable U.S. Equity Fund |
| Class Name | Fidelity® SAI Sustainable U.S. Equity Fund |
| Trading Symbol | FIDEX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® SAI Sustainable U.S. Equity Fund for the period June 1, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® SAI Sustainable U.S. Equity Fund $ 0.55 % |
| Expenses Paid, Amount | $ 29 |
| Expense Ratio, Percent | 0.55% |
| Net Assets | $ 284,783,971 |
| Holdings Count | shares | 68 |
| Investment Company Portfolio Turnover | 49% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 68 Portfolio Turnover 49 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 28.8 Financials 12.5 Consumer Discretionary 10.7 Health Care 10.6 Industrials 9.7 Communication Services 7.6 Consumer Staples 4.7 Energy 4.5 Materials 4.2 Utilities 2.4 Real Estate 2.0 Common Stocks 97.7 Short-Term Investments and Net Other Assets (Liabilities) 2.3 ASSET ALLOCATION (% of Fund's net assets) United States 96.0 Norway 1.2 France 1.0 Italy 0.9 Ireland 0.5 China 0.4 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Apple Inc 7.5 NVIDIA Corp 6.4 Microsoft Corp 6.0 Alphabet Inc Class A 4.0 Amazon.com Inc 3.5 Procter & Gamble Co/The 3.0 Moody's Corp 2.7 Salesforce Inc 2.6 American Express Co 2.5 Cigna Group/The 2.3 40.5 |
| Fidelity SAI Sustainable Sector Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® SAI Sustainable Sector Fund |
| Class Name | Fidelity® SAI Sustainable Sector Fund |
| Trading Symbol | FIDJX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® SAI Sustainable Sector Fund for the period June 1, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® SAI Sustainable Sector Fund $ 0.44 % |
| Expenses Paid, Amount | $ 23 |
| Expense Ratio, Percent | 0.44% |
| Net Assets | $ 298,303,223 |
| Holdings Count | shares | 230 |
| Investment Company Portfolio Turnover | 110% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 230 Portfolio Turnover 110 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 31.5 Financials 14.1 Health Care 11.1 Consumer Discretionary 10.9 Industrials 8.6 Communication Services 7.3 Consumer Staples 5.9 Materials 3.0 Utilities 2.3 Real Estate 2.1 Energy 1.4 Common Stocks 98.2 Domestic Equity Funds 0.7 Short-Term Investments and Net Other Assets (Liabilities) 1.1 ASSET ALLOCATION (% of Fund's net assets) United States 94.1 Taiwan 1.2 Netherlands 0.8 Canada 0.7 Germany 0.7 United Kingdom 0.5 China 0.3 Belgium 0.2 Brazil 0.2 Others 1.3 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Microsoft Corp 8.4 NVIDIA Corp 7.4 Apple Inc 5.4 Amazon.com Inc 4.3 Alphabet Inc Class A 3.8 UnitedHealth Group Inc 1.6 Tesla Inc 1.5 Boston Scientific Corp 1.4 Salesforce Inc 1.2 Walmart Inc 1.2 36.2 |
| Shareholder Report, Holdings (Details) | Nov. 30, 2024 |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | Norway | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | France | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | Italy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | Ireland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 98% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class I | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Water Sustainability Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| Fidelity Water Sustainability Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| Fidelity Water Sustainability Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| Fidelity Water Sustainability Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Fidelity Water Sustainability Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| Fidelity Water Sustainability Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| Fidelity Water Sustainability Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| Fidelity Water Sustainability Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Water Sustainability Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Water Sustainability Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| Fidelity Water Sustainability Fund | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Fidelity Water Sustainability Fund | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 57.70% |
| Fidelity Water Sustainability Fund | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Fidelity Water Sustainability Fund | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Water Sustainability Fund | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34.20% |
| Fidelity Water Sustainability Fund | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 68.20% |
| Fidelity Water Sustainability Fund | France | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| Fidelity Water Sustainability Fund | Italy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Water Sustainability Fund | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| Fidelity Water Sustainability Fund | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| Fidelity Water Sustainability Fund | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| Fidelity Water Sustainability Fund | Japan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Fidelity Water Sustainability Fund | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 97.80% |
| Fidelity Water Sustainability Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Advisor Climate Action Fund - Class I | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Fidelity Advisor Climate Action Fund - Class I | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Fidelity Advisor Climate Action Fund - Class I | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| Fidelity Advisor Climate Action Fund - Class I | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Advisor Climate Action Fund - Class I | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Advisor Climate Action Fund - Class I | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Advisor Climate Action Fund - Class I | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Advisor Climate Action Fund - Class I | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Advisor Climate Action Fund - Class I | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Advisor Climate Action Fund - Class I | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Advisor Climate Action Fund - Class I | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| Fidelity Advisor Climate Action Fund - Class I | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34% |
| Fidelity Advisor Climate Action Fund - Class I | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| Fidelity Advisor Climate Action Fund - Class I | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.50% |
| Fidelity Advisor Climate Action Fund - Class I | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Fidelity Advisor Climate Action Fund - Class I | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| Fidelity Advisor Climate Action Fund - Class I | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Fidelity Advisor Climate Action Fund - Class I | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Advisor Climate Action Fund - Class I | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Advisor Climate Action Fund - Class I | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Advisor Climate Action Fund - Class I | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90% |
| Fidelity Advisor Climate Action Fund - Class I | Ireland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity Advisor Climate Action Fund - Class I | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Advisor Climate Action Fund - Class I | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Advisor Climate Action Fund - Class I | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor Climate Action Fund - Class I | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Advisor Climate Action Fund - Class I | Denmark | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor Climate Action Fund - Class I | Hong Kong | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Advisor Climate Action Fund - Class I | Canada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Advisor Climate Action Fund - Class I | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Advisor Climate Action Fund - Class I | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.20% |
| Fidelity Advisor Climate Action Fund - Class I | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Advisor Climate Action Fund - Class I | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Advisor Climate Action Fund - Class I | AAPreferredSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Climate Action Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Fidelity Climate Action Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Fidelity Climate Action Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| Fidelity Climate Action Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Climate Action Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Climate Action Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Climate Action Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Climate Action Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Climate Action Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Climate Action Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Climate Action Fund | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| Fidelity Climate Action Fund | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34% |
| Fidelity Climate Action Fund | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| Fidelity Climate Action Fund | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.50% |
| Fidelity Climate Action Fund | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Fidelity Climate Action Fund | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| Fidelity Climate Action Fund | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Fidelity Climate Action Fund | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Climate Action Fund | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Climate Action Fund | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Climate Action Fund | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90% |
| Fidelity Climate Action Fund | Ireland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity Climate Action Fund | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Climate Action Fund | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Climate Action Fund | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Climate Action Fund | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Climate Action Fund | Denmark | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Climate Action Fund | Hong Kong | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Climate Action Fund | Canada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Climate Action Fund | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Climate Action Fund | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.20% |
| Fidelity Climate Action Fund | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Climate Action Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Climate Action Fund | AAPreferredSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Advisor Climate Action Fund - Class C | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Fidelity Advisor Climate Action Fund - Class C | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Fidelity Advisor Climate Action Fund - Class C | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| Fidelity Advisor Climate Action Fund - Class C | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Advisor Climate Action Fund - Class C | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Advisor Climate Action Fund - Class C | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Advisor Climate Action Fund - Class C | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Advisor Climate Action Fund - Class C | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Advisor Climate Action Fund - Class C | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Advisor Climate Action Fund - Class C | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Advisor Climate Action Fund - Class C | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| Fidelity Advisor Climate Action Fund - Class C | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34% |
| Fidelity Advisor Climate Action Fund - Class C | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| Fidelity Advisor Climate Action Fund - Class C | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.50% |
| Fidelity Advisor Climate Action Fund - Class C | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Fidelity Advisor Climate Action Fund - Class C | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| Fidelity Advisor Climate Action Fund - Class C | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Fidelity Advisor Climate Action Fund - Class C | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Advisor Climate Action Fund - Class C | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Advisor Climate Action Fund - Class C | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Advisor Climate Action Fund - Class C | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90% |
| Fidelity Advisor Climate Action Fund - Class C | Ireland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity Advisor Climate Action Fund - Class C | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Advisor Climate Action Fund - Class C | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Advisor Climate Action Fund - Class C | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor Climate Action Fund - Class C | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Advisor Climate Action Fund - Class C | Denmark | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor Climate Action Fund - Class C | Hong Kong | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Advisor Climate Action Fund - Class C | Canada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Advisor Climate Action Fund - Class C | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Advisor Climate Action Fund - Class C | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.20% |
| Fidelity Advisor Climate Action Fund - Class C | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Advisor Climate Action Fund - Class C | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Advisor Climate Action Fund - Class C | AAPreferredSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Sustainable U.S. Equity Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Fidelity Sustainable U.S. Equity Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Fidelity Sustainable U.S. Equity Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Fidelity Sustainable U.S. Equity Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Fidelity Sustainable U.S. Equity Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity Sustainable U.S. Equity Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Fidelity Sustainable U.S. Equity Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Fidelity Sustainable U.S. Equity Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Fidelity Sustainable U.S. Equity Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Sustainable U.S. Equity Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Sustainable U.S. Equity Fund | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| Fidelity Sustainable U.S. Equity Fund | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29.10% |
| Fidelity Sustainable U.S. Equity Fund | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| Fidelity Sustainable U.S. Equity Fund | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Sustainable U.S. Equity Fund | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| Fidelity Sustainable U.S. Equity Fund | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Fidelity Sustainable U.S. Equity Fund | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| Fidelity Sustainable U.S. Equity Fund | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Fidelity Sustainable U.S. Equity Fund | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| Fidelity Sustainable U.S. Equity Fund | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Sustainable U.S. Equity Fund | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Fidelity Sustainable U.S. Equity Fund | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96% |
| Fidelity Sustainable U.S. Equity Fund | Norway | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Fidelity Sustainable U.S. Equity Fund | France | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Fidelity Sustainable U.S. Equity Fund | Italy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Sustainable U.S. Equity Fund | Ireland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Sustainable U.S. Equity Fund | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity Sustainable U.S. Equity Fund | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 98% |
| Fidelity Sustainable U.S. Equity Fund | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Sustainable U.S. Equity Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | Norway | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | France | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | Italy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | Ireland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 98% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class A | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Advisor Climate Action Fund - Class A | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Fidelity Advisor Climate Action Fund - Class A | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Fidelity Advisor Climate Action Fund - Class A | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| Fidelity Advisor Climate Action Fund - Class A | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Advisor Climate Action Fund - Class A | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Advisor Climate Action Fund - Class A | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Advisor Climate Action Fund - Class A | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Advisor Climate Action Fund - Class A | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Advisor Climate Action Fund - Class A | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Advisor Climate Action Fund - Class A | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Advisor Climate Action Fund - Class A | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| Fidelity Advisor Climate Action Fund - Class A | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34% |
| Fidelity Advisor Climate Action Fund - Class A | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| Fidelity Advisor Climate Action Fund - Class A | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.50% |
| Fidelity Advisor Climate Action Fund - Class A | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Fidelity Advisor Climate Action Fund - Class A | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| Fidelity Advisor Climate Action Fund - Class A | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Fidelity Advisor Climate Action Fund - Class A | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Advisor Climate Action Fund - Class A | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Advisor Climate Action Fund - Class A | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Advisor Climate Action Fund - Class A | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90% |
| Fidelity Advisor Climate Action Fund - Class A | Ireland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity Advisor Climate Action Fund - Class A | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Advisor Climate Action Fund - Class A | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Advisor Climate Action Fund - Class A | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor Climate Action Fund - Class A | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Advisor Climate Action Fund - Class A | Denmark | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor Climate Action Fund - Class A | Hong Kong | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Advisor Climate Action Fund - Class A | Canada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Advisor Climate Action Fund - Class A | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Advisor Climate Action Fund - Class A | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.20% |
| Fidelity Advisor Climate Action Fund - Class A | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Advisor Climate Action Fund - Class A | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Advisor Climate Action Fund - Class A | AAPreferredSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | Norway | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | France | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | Italy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | Ireland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 98% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class Z | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | Norway | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | France | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | Italy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | Ireland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 98% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class C | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Advisor Climate Action Fund - Class M | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Fidelity Advisor Climate Action Fund - Class M | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Fidelity Advisor Climate Action Fund - Class M | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| Fidelity Advisor Climate Action Fund - Class M | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Advisor Climate Action Fund - Class M | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Advisor Climate Action Fund - Class M | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Advisor Climate Action Fund - Class M | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Advisor Climate Action Fund - Class M | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Advisor Climate Action Fund - Class M | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Advisor Climate Action Fund - Class M | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Advisor Climate Action Fund - Class M | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| Fidelity Advisor Climate Action Fund - Class M | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34% |
| Fidelity Advisor Climate Action Fund - Class M | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| Fidelity Advisor Climate Action Fund - Class M | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.50% |
| Fidelity Advisor Climate Action Fund - Class M | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Fidelity Advisor Climate Action Fund - Class M | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| Fidelity Advisor Climate Action Fund - Class M | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Fidelity Advisor Climate Action Fund - Class M | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Advisor Climate Action Fund - Class M | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Advisor Climate Action Fund - Class M | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Advisor Climate Action Fund - Class M | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90% |
| Fidelity Advisor Climate Action Fund - Class M | Ireland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity Advisor Climate Action Fund - Class M | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Advisor Climate Action Fund - Class M | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Advisor Climate Action Fund - Class M | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor Climate Action Fund - Class M | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Advisor Climate Action Fund - Class M | Denmark | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor Climate Action Fund - Class M | Hong Kong | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Advisor Climate Action Fund - Class M | Canada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Advisor Climate Action Fund - Class M | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Advisor Climate Action Fund - Class M | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.20% |
| Fidelity Advisor Climate Action Fund - Class M | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Advisor Climate Action Fund - Class M | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Advisor Climate Action Fund - Class M | AAPreferredSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Agricultural Productivity Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 24.80% |
| Fidelity Agricultural Productivity Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| Fidelity Agricultural Productivity Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| Fidelity Agricultural Productivity Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Fidelity Agricultural Productivity Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Fidelity Agricultural Productivity Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Fidelity Agricultural Productivity Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Fidelity Agricultural Productivity Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Fidelity Agricultural Productivity Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| Fidelity Agricultural Productivity Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| Fidelity Agricultural Productivity Fund | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Agricultural Productivity Fund | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 31.30% |
| Fidelity Agricultural Productivity Fund | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29.80% |
| Fidelity Agricultural Productivity Fund | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 36.70% |
| Fidelity Agricultural Productivity Fund | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 78.60% |
| Fidelity Agricultural Productivity Fund | Ireland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Fidelity Agricultural Productivity Fund | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| Fidelity Agricultural Productivity Fund | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Agricultural Productivity Fund | Japan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Fidelity Agricultural Productivity Fund | Canada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| Fidelity Agricultural Productivity Fund | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Agricultural Productivity Fund | Faroe Islands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Fidelity Agricultural Productivity Fund | Saudi Arabia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Agricultural Productivity Fund | Indonesia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Agricultural Productivity Fund | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 98.10% |
| Fidelity Agricultural Productivity Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Advisor Climate Action Fund - Class Z | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Fidelity Advisor Climate Action Fund - Class Z | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Fidelity Advisor Climate Action Fund - Class Z | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| Fidelity Advisor Climate Action Fund - Class Z | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Advisor Climate Action Fund - Class Z | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Advisor Climate Action Fund - Class Z | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Advisor Climate Action Fund - Class Z | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Advisor Climate Action Fund - Class Z | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Advisor Climate Action Fund - Class Z | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Advisor Climate Action Fund - Class Z | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Advisor Climate Action Fund - Class Z | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| Fidelity Advisor Climate Action Fund - Class Z | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34% |
| Fidelity Advisor Climate Action Fund - Class Z | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| Fidelity Advisor Climate Action Fund - Class Z | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.50% |
| Fidelity Advisor Climate Action Fund - Class Z | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Fidelity Advisor Climate Action Fund - Class Z | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| Fidelity Advisor Climate Action Fund - Class Z | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Fidelity Advisor Climate Action Fund - Class Z | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Advisor Climate Action Fund - Class Z | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Advisor Climate Action Fund - Class Z | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Advisor Climate Action Fund - Class Z | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90% |
| Fidelity Advisor Climate Action Fund - Class Z | Ireland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity Advisor Climate Action Fund - Class Z | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Advisor Climate Action Fund - Class Z | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Advisor Climate Action Fund - Class Z | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor Climate Action Fund - Class Z | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Advisor Climate Action Fund - Class Z | Denmark | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor Climate Action Fund - Class Z | Hong Kong | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Advisor Climate Action Fund - Class Z | Canada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Advisor Climate Action Fund - Class Z | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Advisor Climate Action Fund - Class Z | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.20% |
| Fidelity Advisor Climate Action Fund - Class Z | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Advisor Climate Action Fund - Class Z | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Advisor Climate Action Fund - Class Z | AAPreferredSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | Norway | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | France | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | Italy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | Ireland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 98% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Advisor Sustainable U.S. Equity Fund - Class M | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity SAI Sustainable U.S. Equity Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Fidelity SAI Sustainable U.S. Equity Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Fidelity SAI Sustainable U.S. Equity Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Fidelity SAI Sustainable U.S. Equity Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| Fidelity SAI Sustainable U.S. Equity Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity SAI Sustainable U.S. Equity Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Fidelity SAI Sustainable U.S. Equity Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Fidelity SAI Sustainable U.S. Equity Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Fidelity SAI Sustainable U.S. Equity Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity SAI Sustainable U.S. Equity Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity SAI Sustainable U.S. Equity Fund | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| Fidelity SAI Sustainable U.S. Equity Fund | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.80% |
| Fidelity SAI Sustainable U.S. Equity Fund | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.60% |
| Fidelity SAI Sustainable U.S. Equity Fund | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity SAI Sustainable U.S. Equity Fund | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.70% |
| Fidelity SAI Sustainable U.S. Equity Fund | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Fidelity SAI Sustainable U.S. Equity Fund | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| Fidelity SAI Sustainable U.S. Equity Fund | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Fidelity SAI Sustainable U.S. Equity Fund | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| Fidelity SAI Sustainable U.S. Equity Fund | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| Fidelity SAI Sustainable U.S. Equity Fund | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Fidelity SAI Sustainable U.S. Equity Fund | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96% |
| Fidelity SAI Sustainable U.S. Equity Fund | Norway | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity SAI Sustainable U.S. Equity Fund | France | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Fidelity SAI Sustainable U.S. Equity Fund | Italy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity SAI Sustainable U.S. Equity Fund | Ireland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity SAI Sustainable U.S. Equity Fund | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity SAI Sustainable U.S. Equity Fund | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 97.70% |
| Fidelity SAI Sustainable U.S. Equity Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity SAI Sustainable Sector Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.40% |
| Fidelity SAI Sustainable Sector Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| Fidelity SAI Sustainable Sector Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| Fidelity SAI Sustainable Sector Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity SAI Sustainable Sector Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| Fidelity SAI Sustainable Sector Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity SAI Sustainable Sector Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Fidelity SAI Sustainable Sector Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Fidelity SAI Sustainable Sector Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity SAI Sustainable Sector Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity SAI Sustainable Sector Fund | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.10% |
| Fidelity SAI Sustainable Sector Fund | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 31.50% |
| Fidelity SAI Sustainable Sector Fund | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| Fidelity SAI Sustainable Sector Fund | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity SAI Sustainable Sector Fund | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.60% |
| Fidelity SAI Sustainable Sector Fund | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Fidelity SAI Sustainable Sector Fund | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.90% |
| Fidelity SAI Sustainable Sector Fund | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| Fidelity SAI Sustainable Sector Fund | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| Fidelity SAI Sustainable Sector Fund | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Fidelity SAI Sustainable Sector Fund | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity SAI Sustainable Sector Fund | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 94.10% |
| Fidelity SAI Sustainable Sector Fund | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity SAI Sustainable Sector Fund | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity SAI Sustainable Sector Fund | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity SAI Sustainable Sector Fund | Canada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity SAI Sustainable Sector Fund | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Fidelity SAI Sustainable Sector Fund | Taiwan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity SAI Sustainable Sector Fund | Netherlands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity SAI Sustainable Sector Fund | Germany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity SAI Sustainable Sector Fund | Belgium | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity SAI Sustainable Sector Fund | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 98.20% |
| Fidelity SAI Sustainable Sector Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity SAI Sustainable Sector Fund | AADomesticEquityFundsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
