XML 8 R2.htm IDEA: XBRL DOCUMENT v3.24.0.1
Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Supplement to the
Fidelity® Government Cash Reserves
January 29, 2024
Prospectus
Effective March 1, 2024, the fund’s management contract was amended to incorporate administrative services previously covered under separate services agreements. The amended contract incorporates a basic fee rate that may vary by class (subject to an income component). The Adviser or an affiliate pays certain expenses of managing and operating the fund out of each class’s management fee.
The following information replaces similar information found in the “Fund Summary” section under the “Fee Table” heading.
Annual Operating Expenses
(expenses that you pay each year as a % of the value of your investment)
Management fee
     0.38% A,B  
Distribution and/or Service (12b‑1) fees
     None  
Other expenses
     0.00% B  
    
 
 
Total annual operating expenses
     0.38%  
A The management fee covers administrative services previously provided under separate services agreements with the fund, for which 0.19% was previously charged under the services agreements.
B Adjusted to reflect current fees.
1 year
     $ 39  
3 years
     $ 122  
5 years
     $ 213  
10 years
     $ 480  
Fidelity Government Cash Reserves  
Risk/Return: rr_RiskReturnAbstract  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Supplement to the
Fidelity® Government Cash Reserves
January 29, 2024
Prospectus
Effective March 1, 2024, the fund’s management contract was amended to incorporate administrative services previously covered under separate services agreements. The amended contract incorporates a basic fee rate that may vary by class (subject to an income component). The Adviser or an affiliate pays certain expenses of managing and operating the fund out of each class’s management fee.
The following information replaces similar information found in the “Fund Summary” section under the “Fee Table” heading.
Annual Operating Expenses
(expenses that you pay each year as a % of the value of your investment)
Management fee
     0.38% A,B  
Distribution and/or Service (12b‑1) fees
     None  
Other expenses
     0.00% B  
    
 
 
Total annual operating expenses
     0.38%  
A The management fee covers administrative services previously provided under separate services agreements with the fund, for which 0.19% was previously charged under the services agreements.
B Adjusted to reflect current fees.
1 year
     $ 39  
3 years
     $ 122  
5 years
     $ 213  
10 years
     $ 480  
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Operating Expenses (expenses that you pay each year as a % of the value of your investment)
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent Adjusted to reflect current fees.
Fidelity Government Cash Reserves | Fidelity Government Cash Reserves  
Risk/Return: rr_RiskReturnAbstract  
Management fee rr_ManagementFeesOverAssets 0.38% [1],[2]
Distribution and/or Service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets none [1]
Total annual operating expenses rr_ExpensesOverAssets 0.38%
1 year rr_ExpenseExampleYear01 $ 39
3 years rr_ExpenseExampleYear03 122
5 years rr_ExpenseExampleYear05 213
10 years rr_ExpenseExampleYear10 $ 480
[1] Adjusted to reflect current fees.
[2] The management fee covers administrative services previously provided under separate services agreements with the fund, for which 0.19% was previously charged under the services agreements.