v3.26.1
Shareholder Report, Holdings (Details)
Mar. 31, 2026
Fidelity Real Estate Equity Central Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
Fidelity Real Estate Equity Central Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
Fidelity Real Estate Equity Central Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
Fidelity Real Estate Equity Central Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
Fidelity Real Estate Equity Central Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
Fidelity Real Estate Equity Central Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Real Estate Equity Central Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Fidelity Real Estate Equity Central Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Fidelity Real Estate Equity Central Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Fidelity Real Estate Equity Central Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Real Estate Equity Central Fund | TI0Member  
Holdings [Line Items]  
Percent of Net Asset Value 30.60%
Fidelity Real Estate Equity Central Fund | TI1Member  
Holdings [Line Items]  
Percent of Net Asset Value 18.40%
Fidelity Real Estate Equity Central Fund | TI2Member  
Holdings [Line Items]  
Percent of Net Asset Value 16.80%
Fidelity Real Estate Equity Central Fund | TI3Member  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
Fidelity Real Estate Equity Central Fund | TI4Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.70%
Fidelity Real Estate Equity Central Fund | TI5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Real Estate Equity Central Fund | TI6Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Real Estate Equity Central Fund | United States  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
Fidelity Real Estate Equity Central Fund | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.20%
Fidelity Real Estate Equity Central Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity International Equity Central Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity International Equity Central Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity International Equity Central Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity International Equity Central Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity International Equity Central Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity International Equity Central Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity International Equity Central Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity International Equity Central Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity International Equity Central Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity International Equity Central Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity International Equity Central Fund | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 25.60%
Fidelity International Equity Central Fund | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.10%
Fidelity International Equity Central Fund | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 10.30%
Fidelity International Equity Central Fund | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity International Equity Central Fund | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 19.60%
Fidelity International Equity Central Fund | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
Fidelity International Equity Central Fund | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
Fidelity International Equity Central Fund | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
Fidelity International Equity Central Fund | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity International Equity Central Fund | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
Fidelity International Equity Central Fund | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Fidelity International Equity Central Fund | United States  
Holdings [Line Items]  
Percent of Net Asset Value 12.30%
Fidelity International Equity Central Fund | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 17.40%
Fidelity International Equity Central Fund | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity International Equity Central Fund | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
Fidelity International Equity Central Fund | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
Fidelity International Equity Central Fund | France  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
Fidelity International Equity Central Fund | Spain  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
Fidelity International Equity Central Fund | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Fidelity International Equity Central Fund | Australia  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity International Equity Central Fund | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 20.90%
Fidelity International Equity Central Fund | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 98.00%
Fidelity International Equity Central Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Floating Rate Central Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Floating Rate Central Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Fidelity Floating Rate Central Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Floating Rate Central Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity Floating Rate Central Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity Floating Rate Central Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Floating Rate Central Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Floating Rate Central Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Floating Rate Central Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Floating Rate Central Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Floating Rate Central Fund | QDAMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Floating Rate Central Fund | QDBBBMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Floating Rate Central Fund | QDBBMember  
Holdings [Line Items]  
Percent of Net Asset Value 18.60%
Fidelity Floating Rate Central Fund | QDBMember  
Holdings [Line Items]  
Percent of Net Asset Value 59.40%
Fidelity Floating Rate Central Fund | QDCCCCCCMember  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
Fidelity Floating Rate Central Fund | QDDMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Floating Rate Central Fund | QDNotRatedMember  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
Fidelity Floating Rate Central Fund | QDEquitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Floating Rate Central Fund | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Floating Rate Central Fund | United States  
Holdings [Line Items]  
Percent of Net Asset Value 91.40%
Fidelity Floating Rate Central Fund | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Floating Rate Central Fund | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Floating Rate Central Fund | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Floating Rate Central Fund | France  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Floating Rate Central Fund | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Floating Rate Central Fund | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Floating Rate Central Fund | GrandCaymanUKOverseasTerMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Floating Rate Central Fund | Switzerland  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Floating Rate Central Fund | Luxembourg  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Floating Rate Central Fund | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Floating Rate Central Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Floating Rate Central Fund | AABankLoanObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 88.20%
Fidelity Floating Rate Central Fund | AACorporateBondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Floating Rate Central Fund | AAAlternativeFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Floating Rate Central Fund | AAAssetBackedSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Floating Rate Central Fund | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Floating Rate Central Fund | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Emerging Markets Equity Central Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 15.90%
Fidelity Emerging Markets Equity Central Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
Fidelity Emerging Markets Equity Central Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
Fidelity Emerging Markets Equity Central Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Emerging Markets Equity Central Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Emerging Markets Equity Central Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Emerging Markets Equity Central Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Emerging Markets Equity Central Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity Emerging Markets Equity Central Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity Emerging Markets Equity Central Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity Emerging Markets Equity Central Fund | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 20.80%
Fidelity Emerging Markets Equity Central Fund | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 31.40%
Fidelity Emerging Markets Equity Central Fund | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Fidelity Emerging Markets Equity Central Fund | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Emerging Markets Equity Central Fund | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
Fidelity Emerging Markets Equity Central Fund | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
Fidelity Emerging Markets Equity Central Fund | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
Fidelity Emerging Markets Equity Central Fund | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Fidelity Emerging Markets Equity Central Fund | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
Fidelity Emerging Markets Equity Central Fund | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Emerging Markets Equity Central Fund | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Emerging Markets Equity Central Fund | United States  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Emerging Markets Equity Central Fund | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
Fidelity Emerging Markets Equity Central Fund | China  
Holdings [Line Items]  
Percent of Net Asset Value 26.30%
Fidelity Emerging Markets Equity Central Fund | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 21.20%
Fidelity Emerging Markets Equity Central Fund | Korea, Republic of  
Holdings [Line Items]  
Percent of Net Asset Value 15.40%
Fidelity Emerging Markets Equity Central Fund | India  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
Fidelity Emerging Markets Equity Central Fund | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
Fidelity Emerging Markets Equity Central Fund | South Africa  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Emerging Markets Equity Central Fund | Saudi Arabia  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Emerging Markets Equity Central Fund | Mexico  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Emerging Markets Equity Central Fund | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 97.70%
Fidelity Emerging Markets Equity Central Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Emerging Markets Equity Central Fund | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%