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Consumer Discretionary Sector Member
Consumer Staples Sector Member
Industrial Sector Member
Materials Sector Member
Utilities Sector Member
Unclassified Sector Member
Information Technology Member
Healthcare Sector [Member]
Healthcare Sector
Communications Sector Member
Financial Services Sector [Member]
Financial Services Sector
Real Estate Sector [Member]
Real Estate Sector
Technology Sector [Member]
Technology Sector
Agricultural Sector [Member]
Agricultural Sector Member
Energy Sector [Member]
Energy Sector
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Investment Company Portfolio Turnover
C000204614 [Member]
Fidelity ZERO Total Market Index Fund
Fidelity ZERO Total Market Index Fund
C000204612 [Member]
Fidelity ZERO Large Cap Index Fund
Fidelity ZERO Large Cap Index Fund
C000204613 [Member]
Fidelity ZERO International Index Fund
Fidelity ZERO International Index Fund
C000204611 [Member]
Fidelity ZERO Extended Market Index Fund
Fidelity ZERO Extended Market Index Fund
C000203453 [Member]
Fidelity Series International Index Fund
Fidelity Series International Index Fund
C000227500 [Member]
Fidelity SAI Japan Stock Index Fund
Fidelity SAI Japan Stock Index Fund
C000227499 [Member]
Fidelity SAI International Small Cap Index Fund
Fidelity SAI International Small Cap Index Fund
C000251104 [Member]
Fidelity SAI Canada Equity Index Fund
Fidelity SAI Canada Equity Index Fund
C000251105 [Member]
Fidelity SAI Global ex U.S. Low Volatility Index Fund
Fidelity SAI Global ex U.S. Low Volatility Index Fund
United States
United States
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Switzerland
Switzerland
Australia
Australia
United Kingdom
United Kingdom
Canada
Canada
Korea, Republic of
Korea, Republic of
Thailand
Thailand
Puerto Rico
Puerto Rico
Japan
Japan
Taiwan
Taiwan
China
China
Germany
Germany
OtherMember
Bermuda
Bermuda
Sweden
Sweden
Singapore
Singapore
France
France
Spain
Spain
Israel
Israel
Italy
Italy
Brazil
Brazil
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Chile
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Zambia
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India
India
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MSFinancialsSectorMember [Member]
MSFinancialsSectorMember
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AACommonStocksMember [Member]
AACommonStocksMember
AACommonStocksMember
AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember [Member]
AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember
AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember
TH0Member [Member]
TH0Member
TH0Member
TH1Member [Member]
TH1Member
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TH2Member [Member]
TH2Member
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TH5Member
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AAPreferredStocksMember
AAPreferredStocksMember