Expense Example {- Fidelity® Tax-Exempt Money Market Fund} - 10.31 Fidelity Tax-Exempt Money Market Fund Premium PRO-11 - Fidelity® Tax-Exempt Money Market Fund - Fidelity Tax-Exempt Money Market Fund-Premium Class	Dec. 30, 2021 USD ($)
Expense Example:
1 year	$ 31
3 years	107
5 years	196
10 years	$ 456