Annual Operating Expenses - FidelitySAIInternationalValueIndexFund-PRO - FidelitySAIInternationalValueIndexFund-PRO - Fidelity SAI International Value Index Fund - Fidelity SAI International Value Index Fund	Dec. 30, 2022
Operating Expenses:
Management fee	0.15%
Distribution and/or Service (12b-1) fees	none
Other expenses	0.01%
Total annual operating expenses	0.16%