Expense Example {- Fidelity® Series Commodity Strategy Fund} - 07.31 Fidelity Series Commodity Strategy Fund Series PRO-08 - Fidelity® Series Commodity Strategy Fund - Fidelity Series Commodity Strategy Fund-Default	Sep. 29, 2021 USD ($)
Expense Example:
1 year	none
3 years	none
5 years	none
10 years	none