Annual Operating Expenses - SelectPortfoliosFidelityAdvisorMaterialsFund-AMCIZPRO - SelectPortfoliosFidelityAdvisorMaterialsFund-AMCIZPRO - Select Materials Portfolio	Apr. 29, 2024
Fidelity Advisor Materials Fund - Class A
Operating Expenses:
Management fee	0.72%	[1],[2]
Distribution and/or Service (12b-1) fees	0.25%
Other expenses	0.02%	[2]
Total annual operating expenses	0.99%
Fidelity Advisor Materials Fund - Class C
Operating Expenses:
Management fee	0.72%	[1],[2]
Distribution and/or Service (12b-1) fees	1.00%
Other expenses	0.02%	[2]
Total annual operating expenses	1.74%
Fidelity Advisor Materials Fund - Class M
Operating Expenses:
Management fee	0.72%	[1],[2]
Distribution and/or Service (12b-1) fees	0.50%
Other expenses	0.02%	[2]
Total annual operating expenses	1.24%
Fidelity Advisor Materials Fund - Class I
Operating Expenses:
Management fee	0.70%	[1],[2]
Distribution and/or Service (12b-1) fees	none
Other expenses	0.02%	[2]
Total annual operating expenses	0.72%
Fidelity Advisor Materials Fund - Class Z
Operating Expenses:
Management fee	0.56%	[1],[2]
Distribution and/or Service (12b-1) fees	none
Other expenses	0.02%	[2]
Total annual operating expenses	0.58%

[1] A The management fee covers administrative services previously provided under separate services agreements with the fund, for which 0.23%, 0.23%, 0.23%, 0.21%, and 0.07% for Class A, Class M, Class C, Class I, and Class Z, respectively, was previously charged under the services agreements.

[2] B Adjusted to reflect current fees.