Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	FIDELITY SELECT PORTFOLIOS
Prospectus Date	rr_ProspectusDate	Apr. 29, 2017
02.28 Select Portfolios: Group 7 Information Technology Sector Combo PRO-06 | Computers Portfolio
Risk/Return:	rr_RiskReturnAbstract
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile.