Annual Operating Expenses - FidelityHealthSavingsFunds-RetailComboPRO - FidelityHealthSavingsFunds-RetailComboPRO - Fidelity Health Savings Index Fund - Fidelity Health Savings Index Fund	Nov. 29, 2022
Operating Expenses:
Management fee	0.15%
Distribution and/or Service (12b-1) fees	none
Other expenses	none
Acquired fund fees and expenses	0.09%
Total annual operating expenses	0.24%	[1]
Fee waiver and/or expense reimbursement	0.05%	[2]
Total annual operating expenses after fee waiver and/or expense reimbursement	0.19%	[1]

[1] A Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

[2] B Fidelity Management & Research Company LLC (FMR) has contractually agreed to waive 0.05% of the fund's management fee. This arrangement will remain in effect through January 31, 2024 . FMR may not terminate this arrangement before the expiration date without the approval of the Board of Trustees and may extend it in its discretion after that date.