| Form N-CSR Cover | 6 Months Ended |
| Nov. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Fidelity Rutland Square Trust II |
| Entity Central Index Key | 0001364924 |
| 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 Rutland Square Trust II |
| Entity Central Index Key | 0001364924 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Nov. 30, 2024 |
| Strategic Advisers Municipal Bond Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Strategic Advisers® Municipal Bond Fund |
| Class Name | Strategic Advisers® Municipal Bond Fund |
| Trading Symbol | FSMUX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Strategic Advisers® Municipal Bond 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 Strategic Advisers® Municipal Bond Fund $ 0.09 % |
| Expenses Paid, Amount | $ 4 |
| Expense Ratio, Percent | 0.09% |
| Net Assets | $ 11,756,563,545 |
| Holdings Count | shares | 7,202 |
| Investment Company Portfolio Turnover | 26% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 7,202 Portfolio Turnover 26 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Other 26.6 Transportation 18.6 General Obligations 15.4 Health Care 10.6 Special Tax 8.8 Others(Individually Less Than 5%) 20.0 100.0 AAA 3.2 AA 22.5 A 25.0 BBB 11.1 BB 1.7 B 0.4 CCC,CC,C 0.0 D 0.0 Not Rated 8.9 Equities 24.8 Short-Term Investments and Net Other Assets (Liabilities) 2.4 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) New York 8.6 Illinois 7.3 California 6.5 Texas 4.4 New Jersey 3.6 |
| Strategic Advisers Fidelity Emerging Markets Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Strategic Advisers® Fidelity® Emerging Markets Fund |
| Class Name | Strategic Advisers® Fidelity® Emerging Markets Fund |
| Trading Symbol | FGOMX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Strategic Advisers® Fidelity® Emerging Markets 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 Strategic Advisers® Fidelity® Emerging Markets Fund $ 0.20 % |
| Expenses Paid, Amount | $ 10 |
| Expense Ratio, Percent | 0.20% |
| Net Assets | $ 19,805,355,277 |
| Holdings Count | shares | 292 |
| Investment Company Portfolio Turnover | 45% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 292 Portfolio Turnover 45 % |
| Holdings [Text Block] | Common Stocks 51.3 International Equity Funds 41.7 Preferred Stocks 0.0 Short-Term Investments and Net Other Assets (Liabilities) 7.0 ASSET ALLOCATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Fidelity SAI Emerging Markets Value Index Fund 21.8 Fidelity SAI Emerging Markets Index Fund 8.2 Fidelity SAI Emerging Markets Low Volatility Index Fund 6.0 Taiwan Semiconductor Manufacturing Co Ltd 5.8 Invesco Government & Agency Portfolio Institutional Class 5.1 Fidelity Advisor Emerging Markets Fund - Class Z 5.0 Tencent Holdings Ltd 3.3 Samsung Electronics Co Ltd 2.1 Meituan B Shares 1.3 HDFC Bank Ltd/Gandhinagar 1.1 59.7 |
| Strategic Advisers Fidelity U.S. Total Stock Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Strategic Advisers® Fidelity® U.S. Total Stock Fund |
| Class Name | Strategic Advisers® Fidelity® U.S. Total Stock Fund |
| Trading Symbol | FCTDX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Strategic Advisers® Fidelity® U.S. Total Stock 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 Strategic Advisers® Fidelity® U.S. Total Stock Fund $ 0.13 % |
| Expenses Paid, Amount | $ 7 |
| Expense Ratio, Percent | 0.13% |
| Net Assets | $ 144,977,571,981 |
| Holdings Count | shares | 1,842 |
| Investment Company Portfolio Turnover | 32% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 1,842 Portfolio Turnover 32 % |
| Holdings [Text Block] | Domestic Equity Funds 49.0 Common Stocks 48.7 Bonds 1.2 Preferred Stocks 0.1 Short-Term Investments and Net Other Assets (Liabilities) 1.0 ASSET ALLOCATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Fidelity SAI U.S. Quality Index Fund 10.3 Fidelity Growth Company Fund 10.1 Fidelity Magellan Fund 6.0 Fidelity SAI U.S. Low Volatility Index Fund 6.0 Fidelity Contrafund 4.0 Fidelity SAI U.S. Value Index Fund 2.8 Fidelity Extended Market Index Fund 2.6 Fidelity Blue Chip Growth Fund 2.3 Microsoft Corp 2.3 Fidelity SAI U.S. Large Cap Index Fund 2.0 48.4 |
| Strategic Advisers Fidelity Core Income Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Strategic Advisers® Fidelity® Core Income Fund |
| Class Name | Strategic Advisers® Fidelity® Core Income Fund |
| Trading Symbol | FIWGX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Strategic Advisers® Fidelity® Core Income 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 Strategic Advisers® Fidelity® Core Income Fund $ 0.05 % |
| Expenses Paid, Amount | $ 3 |
| Expense Ratio, Percent | 0.05% |
| Net Assets | $ 70,773,653,731 |
| Holdings Count | shares | 6,208 |
| Investment Company Portfolio Turnover | 221% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 6,208 Portfolio Turnover 221 % |
| Holdings [Text Block] | Fixed-Income Funds 47.1 U.S. Government Agency - Mortgage Securities 19.7 U.S. Treasury Obligations 14.3 Corporate Bonds 13.3 CMOs and Other Mortgage Related Securities 5.6 Asset-Backed Securities 4.0 Purchased Options 0.1 Preferred Securities 0.1 Foreign Government and Government Agency Obligations 0.1 Municipal Securities 0.0 Other Investments 0.0 Bank Loan Obligations 0.0 Common Stocks 0.0 ASSET ALLOCATION (% of Fund's net assets) Short-Term Investments and Net Other Assets (Liabilities) - (4.3)% |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Fidelity SAI Total Bond Fund 23.3 US Treasury Notes 10.9 Fidelity SAI U.S. Treasury Bond Index Fund 8.7 Fannie Mae Mortgage pass-thru certificates 6.6 Ginnie Mae II Pool 5.7 Freddie Mac Gold Pool 4.2 Fidelity SAI Intermediate Treasury Bond Index Fund 3.9 Fidelity SAI Long-Term Treasury Bond Index Fund 3.6 US Treasury Bonds 3.4 Uniform Mortgage Backed Securities 2.4 72.7 |
| Strategic Advisers U.S. Total Stock Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Strategic Advisers® U.S. Total Stock Fund |
| Class Name | Strategic Advisers® U.S. Total Stock Fund |
| Trading Symbol | FSAKX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Strategic Advisers® U.S. Total Stock 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 Strategic Advisers® U.S. Total Stock Fund $ 0.18 % |
| Expenses Paid, Amount | $ 9 |
| Expense Ratio, Percent | 0.18% |
| Net Assets | $ 79,464,747,781 |
| Holdings Count | shares | 2,416 |
| Investment Company Portfolio Turnover | 64% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 2,416 Portfolio Turnover 64 % |
| Holdings [Text Block] | Common Stocks 83.5 Domestic Equity Funds 14.9 Bonds 0.8 Purchased Options 0.0 Short-Term Investments and Net Other Assets (Liabilities) 0.8 ASSET ALLOCATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) NVIDIA Corp 4.9 Microsoft Corp 4.7 Fidelity Growth Company Fund 4.6 Apple Inc 4.4 Fidelity Extended Market Index Fund 4.1 Amazon.com Inc 3.1 Fidelity SAI U.S. Quality Index Fund 2.2 Meta Platforms Inc Class A 1.9 Alphabet Inc Class C 1.4 Fidelity SAI U.S. Low Volatility Index Fund 1.3 32.6 |
| Strategic Advisers Tax-Sensitive Short Duration Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Strategic Advisers® Tax-Sensitive Short Duration Fund |
| Class Name | Strategic Advisers® Tax-Sensitive Short Duration Fund |
| Trading Symbol | FGNSX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Strategic Advisers® Tax-Sensitive Short Duration 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 Strategic Advisers® Tax-Sensitive Short Duration Fund $ 0.07 % |
| Expenses Paid, Amount | $ 4 |
| Expense Ratio, Percent | 0.07% |
| Net Assets | $ 3,610,660,619 |
| Holdings Count | shares | 1,410 |
| Investment Company Portfolio Turnover | 75% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 1,410 Portfolio Turnover 75 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) General Obligations 17.9 Other 14.5 Health Care 10.1 Transportation 9.2 Housing 6.4 Synthetics 6.0 Electric Utilities 5.7 Others(Individually Less Than 5%) 30.2 100.0 AAA 11.4 AA 22.3 A 28.8 BBB 9.0 BB 0.2 Not Rated 7.7 Equities 10.7 Short-Term Investments and Net Other Assets (Liabilities) 9.9 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Texas 11.2 Illinois 7.4 New York 4.2 Georgia 4.2 Florida 3.3 |
| Strategic Advisers Short Duration Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Strategic Advisers® Short Duration Fund |
| Class Name | Strategic Advisers® Short Duration Fund |
| Trading Symbol | FAUDX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Strategic Advisers® Short Duration 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 Strategic Advisers® Short Duration Fund $ 0.04 % |
| Expenses Paid, Amount | $ 2 |
| Expense Ratio, Percent | 0.04% |
| Net Assets | $ 4,409,384,045 |
| Holdings Count | shares | 1,218 |
| Investment Company Portfolio Turnover | 67% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 1,218 Portfolio Turnover 67 % |
| Holdings [Text Block] | Fixed-Income Funds 55.6 Corporate Bonds 18.5 U.S. Treasury Obligations 11.2 Asset-Backed Securities 8.6 CMOs and Other Mortgage Related Securities 2.5 U.S. Government Agency - Mortgage Securities 1.0 Other Investments 0.2 Short-Term Investments and Net Other Assets (Liabilities) 2.4 ASSET ALLOCATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) PIMCO Short-Term Fund Institutional Class 11.6 JPMorgan Ultra-Short Income ETF 10.6 Baird Ultra Short Bond Fund Institutional Class 8.8 US Treasury Notes 7.8 T. Rowe Price Ultra Short-Term Bond Fund 7.4 Morgan Stanley Institutional Fund Trust Ultra-Short Income Portfolio Class IR 5.6 Baird Short-Term Bond Fund Institutional Class 3.8 US Treasury Bill 3.4 iShares Ultra Short-Term Bond Active ETF 3.3 iShares 1-3 Year Treasury Bond ETF 2.6 64.9 |
| Strategic Advisers Alternatives Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Strategic Advisers® Alternatives Fund |
| Class Name | Strategic Advisers® Alternatives Fund |
| Trading Symbol | FSLTX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Strategic Advisers® Alternatives 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 Strategic Advisers® Alternatives Fund $ 0.13 % |
| Expenses Paid, Amount | $ 7 |
| Expense Ratio, Percent | 0.13% |
| Net Assets | $ 2,238,501,299 |
| Holdings Count | shares | 1,196 |
| Investment Company Portfolio Turnover | 89% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 1,196 Portfolio Turnover 89 % |
| Holdings [Text Block] | DERIVATIVE EXPOSURE (% of Fund's net assets) Futures Contracts 60.0 Swaps 58.5 Forward Foreign Currency Contracts 26.7 Alternative Funds 31.1 Fixed-Income Funds 4.0 Corporate Bonds 0.5 Asset-Backed Securities 0.3 U.S. Treasury Obligations 0.1 CMOs and Other Mortgage Related Securities 0.1 Foreign Government and Government Agency Obligations 0.0 U.S. Government Agency - Mortgage Securities 0.0 Purchased Options 0.0 Futures Contracts 24.4 Swaps 23.7 Forward Foreign Currency Contracts 10.9 Short-Term Investments and Net Other Assets (Liabilities) 4.9 ASSET ALLOCATION (% of Fund's Total Exposure) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Fidelity SAI Convertible Arbitrage Fund 14.4 BlackRock Systematic Multi-Strategy Fund Investor A Shares 10.4 Eaton Vance Global Macro Absolute Return Advantage Fund Class A 9.8 BlackRock Global Equity Market Neutral Fund A Shares 8.2 Absolute Convertible Arbitrage Fund Investor Shares 7.2 Stone Ridge Diversified Alternatives Fund Class I 7.0 First Trust Merger Arbitrage Fund Class I 6.6 The Merger Fund Class A 6.2 Federated Hermes MDT Market Neutral Fund A Shares 6.2 State Street Institutional U.S. Government Money Market Fund Premier Class 5.4 81.4 |
| Shareholder Report, Holdings (Details) | Nov. 30, 2024 |
| Strategic Advisers Municipal Bond Fund | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.60% |
| Strategic Advisers Municipal Bond Fund | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| Strategic Advisers Municipal Bond Fund | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Strategic Advisers Municipal Bond Fund | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Strategic Advisers Municipal Bond Fund | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| Strategic Advisers Municipal Bond Fund | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.60% |
| Strategic Advisers Municipal Bond Fund | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.60% |
| Strategic Advisers Municipal Bond Fund | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| Strategic Advisers Municipal Bond Fund | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.60% |
| Strategic Advisers Municipal Bond Fund | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.80% |
| Strategic Advisers Municipal Bond Fund | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20% |
| Strategic Advisers Municipal Bond Fund | QDAAAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| Strategic Advisers Municipal Bond Fund | QDAAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.50% |
| Strategic Advisers Municipal Bond Fund | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25% |
| Strategic Advisers Municipal Bond Fund | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| Strategic Advisers Municipal Bond Fund | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Strategic Advisers Municipal Bond Fund | QDBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Strategic Advisers Municipal Bond Fund | QDCCCCCCMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Strategic Advisers Municipal Bond Fund | QDDMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Strategic Advisers Municipal Bond Fund | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| Strategic Advisers Municipal Bond Fund | QDEquitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 24.80% |
| Strategic Advisers Municipal Bond Fund | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Strategic Advisers Fidelity Emerging Markets Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| Strategic Advisers Fidelity Emerging Markets Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| Strategic Advisers Fidelity Emerging Markets Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Strategic Advisers Fidelity Emerging Markets Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.80% |
| Strategic Advisers Fidelity Emerging Markets Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| Strategic Advisers Fidelity Emerging Markets Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| Strategic Advisers Fidelity Emerging Markets Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Strategic Advisers Fidelity Emerging Markets Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Strategic Advisers Fidelity Emerging Markets Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Strategic Advisers Fidelity Emerging Markets Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Strategic Advisers Fidelity Emerging Markets Fund | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 51.30% |
| Strategic Advisers Fidelity Emerging Markets Fund | AAInternationalEquityFundsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 41.70% |
| Strategic Advisers Fidelity Emerging Markets Fund | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Strategic Advisers Fidelity Emerging Markets Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Strategic Advisers Fidelity U.S. Total Stock Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.30% |
| Strategic Advisers Fidelity U.S. Total Stock Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Strategic Advisers Fidelity U.S. Total Stock Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Strategic Advisers Fidelity U.S. Total Stock Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Strategic Advisers Fidelity U.S. Total Stock Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| Strategic Advisers Fidelity U.S. Total Stock Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Strategic Advisers Fidelity U.S. Total Stock Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Strategic Advisers Fidelity U.S. Total Stock Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Strategic Advisers Fidelity U.S. Total Stock Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Strategic Advisers Fidelity U.S. Total Stock Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Strategic Advisers Fidelity U.S. Total Stock Fund | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 48.70% |
| Strategic Advisers Fidelity U.S. Total Stock Fund | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Strategic Advisers Fidelity U.S. Total Stock Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Strategic Advisers Fidelity U.S. Total Stock Fund | AADomesticEquityFundsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 49% |
| Strategic Advisers Fidelity U.S. Total Stock Fund | AABondsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Strategic Advisers Fidelity Core Income Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.30% |
| Strategic Advisers Fidelity Core Income Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.90% |
| Strategic Advisers Fidelity Core Income Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| Strategic Advisers Fidelity Core Income Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| Strategic Advisers Fidelity Core Income Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| Strategic Advisers Fidelity Core Income Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Strategic Advisers Fidelity Core Income Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| Strategic Advisers Fidelity Core Income Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| Strategic Advisers Fidelity Core Income Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| Strategic Advisers Fidelity Core Income Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Strategic Advisers Fidelity Core Income Fund | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Strategic Advisers Fidelity Core Income Fund | AAFixedIncomeFundsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 47.10% |
| Strategic Advisers Fidelity Core Income Fund | AAUSGovernmentAgencyMortgageSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| Strategic Advisers Fidelity Core Income Fund | AAUSTreasuryObligationsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.30% |
| Strategic Advisers Fidelity Core Income Fund | AACorporateBondsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.30% |
| Strategic Advisers Fidelity Core Income Fund | AACMOsandOtherMortgageRelatedSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Strategic Advisers Fidelity Core Income Fund | AAAssetBackedSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| Strategic Advisers Fidelity Core Income Fund | AAPurchasedOptionsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Strategic Advisers Fidelity Core Income Fund | AAPreferredSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Strategic Advisers Fidelity Core Income Fund | AAForeignGovernmentandGovernmentAgencyObligationsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Strategic Advisers Fidelity Core Income Fund | AAMunicipalSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Strategic Advisers Fidelity Core Income Fund | AAOtherInvestmentsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Strategic Advisers Fidelity Core Income Fund | AABankLoanObligationsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Strategic Advisers U.S. Total Stock Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Strategic Advisers U.S. Total Stock Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Strategic Advisers U.S. Total Stock Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Strategic Advisers U.S. Total Stock Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Strategic Advisers U.S. Total Stock Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Strategic Advisers U.S. Total Stock Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Strategic Advisers U.S. Total Stock Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Strategic Advisers U.S. Total Stock Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Strategic Advisers U.S. Total Stock Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Strategic Advisers U.S. Total Stock Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Strategic Advisers U.S. Total Stock Fund | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 83.50% |
| Strategic Advisers U.S. Total Stock Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Strategic Advisers U.S. Total Stock Fund | AADomesticEquityFundsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.90% |
| Strategic Advisers U.S. Total Stock Fund | AABondsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Strategic Advisers U.S. Total Stock Fund | AAPurchasedOptionsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.20% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.90% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.50% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | RS7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.20% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | QDAAAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.40% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | QDAAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.30% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.80% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | QDEquitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| Strategic Advisers Tax-Sensitive Short Duration Fund | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| Strategic Advisers Short Duration Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.60% |
| Strategic Advisers Short Duration Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.60% |
| Strategic Advisers Short Duration Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.80% |
| Strategic Advisers Short Duration Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| Strategic Advisers Short Duration Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| Strategic Advisers Short Duration Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Strategic Advisers Short Duration Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| Strategic Advisers Short Duration Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| Strategic Advisers Short Duration Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Strategic Advisers Short Duration Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Strategic Advisers Short Duration Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Strategic Advisers Short Duration Fund | AAFixedIncomeFundsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 55.60% |
| Strategic Advisers Short Duration Fund | AAUSGovernmentAgencyMortgageSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Strategic Advisers Short Duration Fund | AAUSTreasuryObligationsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.20% |
| Strategic Advisers Short Duration Fund | AACorporateBondsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.50% |
| Strategic Advisers Short Duration Fund | AACMOsandOtherMortgageRelatedSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Strategic Advisers Short Duration Fund | AAAssetBackedSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.60% |
| Strategic Advisers Short Duration Fund | AAOtherInvestmentsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Strategic Advisers Alternatives Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.40% |
| Strategic Advisers Alternatives Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.40% |
| Strategic Advisers Alternatives Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.80% |
| Strategic Advisers Alternatives Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| Strategic Advisers Alternatives Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| Strategic Advisers Alternatives Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Strategic Advisers Alternatives Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| Strategic Advisers Alternatives Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| Strategic Advisers Alternatives Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| Strategic Advisers Alternatives Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| Strategic Advisers Alternatives Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Long Exposure | 4.90% |
| Strategic Advisers Alternatives Fund | AAFixedIncomeFundsMember | |
| Holdings [Line Items] | |
| Percent of Net Long Exposure | 4% |
| Strategic Advisers Alternatives Fund | AAUSGovernmentAgencyMortgageSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Long Exposure | 0% |
| Strategic Advisers Alternatives Fund | AAUSTreasuryObligationsMember | |
| Holdings [Line Items] | |
| Percent of Net Long Exposure | 0.10% |
| Strategic Advisers Alternatives Fund | AACorporateBondsMember | |
| Holdings [Line Items] | |
| Percent of Net Long Exposure | 0.50% |
| Strategic Advisers Alternatives Fund | AACMOsandOtherMortgageRelatedSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Long Exposure | 0.10% |
| Strategic Advisers Alternatives Fund | AAAssetBackedSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Long Exposure | 0.30% |
| Strategic Advisers Alternatives Fund | AAPurchasedOptionsMember | |
| Holdings [Line Items] | |
| Percent of Net Long Exposure | 0% |
| Strategic Advisers Alternatives Fund | AAForeignGovernmentandGovernmentAgencyObligationsMember | |
| Holdings [Line Items] | |
| Percent of Net Long Exposure | 0% |
| Strategic Advisers Alternatives Fund | DEFuturesContractsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 60% |
| Strategic Advisers Alternatives Fund | DESwapsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 58.50% |
| Strategic Advisers Alternatives Fund | DEForwardForeignCurrencyContractsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.70% |
| Strategic Advisers Alternatives Fund | AAAlternativeFundsMember | |
| Holdings [Line Items] | |
| Percent of Net Long Exposure | 31.10% |
| Strategic Advisers Alternatives Fund | AAFuturesContractsMember | |
| Holdings [Line Items] | |
| Percent of Net Long Exposure | 24.40% |
| Strategic Advisers Alternatives Fund | AASwapsMember | |
| Holdings [Line Items] | |
| Percent of Net Long Exposure | 23.70% |
| Strategic Advisers Alternatives Fund | AAForwardForeignCurrencyContractsMember | |
| Holdings [Line Items] | |
| Percent of Net Long Exposure | 10.90% |
