3.26.1 html 108 94 1 false 38 0 false 5 false false R1.htm 0000001 - Document - Cover Sheet http://generalmills.com/role/Cover Cover Cover 1 false false R2.htm 0000002 - Statement - Employee Benefit Plan, Statement of Net Asset Available for Benefit (Statement) Sheet http://generalmills.com/role/EmployeeBenefitPlanStatementofNetAssetAvailableforBenefitStatement Employee Benefit Plan, Statement of Net Asset Available for Benefit (Statement) Statements 2 false false R3.htm 0000003 - Statement - Employee Benefit Plan, Statement of Change in Net Asset Available for Benefit (Statement) Sheet http://generalmills.com/role/EmployeeBenefitPlanStatementofChangeinNetAssetAvailableforBenefitStatement Employee Benefit Plan, Statement of Change in Net Asset Available for Benefit (Statement) Statements 3 false false R4.htm 0000005 - Disclosure - Employee Benefit Plan, Description of Plan Sheet http://generalmills.com/role/EmployeeBenefitPlanDescriptionofPlan Employee Benefit Plan, Description of Plan Notes 4 false false R5.htm 0000010 - Disclosure - Employee Benefit Plan, Company Stock Fund Sheet http://generalmills.com/role/EmployeeBenefitPlanCompanyStockFund Employee Benefit Plan, Company Stock Fund Notes 5 false false R6.htm 0000014 - Disclosure - Employee Benefit Plan, Schedule, Asset Held for Investment Sheet http://generalmills.com/role/EmployeeBenefitPlanScheduleAssetHeldforInvestment Employee Benefit Plan, Schedule, Asset Held for Investment Notes 6 false false R7.htm 0000029 - Disclosure - Employee Benefit Plan, Summary of Accounting Policy (Details) Sheet http://generalmills.com/role/EmployeeBenefitPlanSummaryofAccountingPolicyDetails Employee Benefit Plan, Summary of Accounting Policy (Details) Details 7 false false R8.htm 0000030 - Disclosure - Employee Benefit Plan, Fair Value and NAV (Details) Sheet http://generalmills.com/role/EmployeeBenefitPlanFairValueandNAVDetails Employee Benefit Plan, Fair Value and NAV (Details) Details 8 false false R9.htm 0000031 - Disclosure - Employee Benefit Plan, Master Trust (Details) Sheet http://generalmills.com/role/EmployeeBenefitPlanMasterTrustDetails Employee Benefit Plan, Master Trust (Details) Details 9 false false R10.htm 0000032 - Disclosure - Employee Benefit Plan, Fully Benefit-Responsive Investment Contracts (Details) Sheet http://generalmills.com/role/EmployeeBenefitPlanFullyBenefitResponsiveInvestmentContractsDetails Employee Benefit Plan, Fully Benefit-Responsive Investment Contracts (Details) Details 10 false false R11.htm 0000034 - Disclosure - Employee Benefit Plan, ESOP Funds (Details) Sheet http://generalmills.com/role/EmployeeBenefitPlanESOPFundsDetails Employee Benefit Plan, ESOP Funds (Details) Details 11 false false R12.htm 0000035 - Disclosure - Employee Benefit Plan, Tax Status (Details) Sheet http://generalmills.com/role/EmployeeBenefitPlanTaxStatusDetails Employee Benefit Plan, Tax Status (Details) Details 12 false false R13.htm 0000036 - Disclosure - Employee Benefit Plan, Related-Party and Party-in-Interest Transactions (Details) Sheet http://generalmills.com/role/EmployeeBenefitPlanRelatedPartyandPartyinInterestTransactionsDetails Employee Benefit Plan, Related-Party and Party-in-Interest Transactions (Details) Details 13 false false R14.htm 0000037 - Disclosure - Employee Benefit Plan, Schedule, Asset Held for Investment (Details) Sheet http://generalmills.com/role/EmployeeBenefitPlanScheduleAssetHeldforInvestmentDetails Employee Benefit Plan, Schedule, Asset Held for Investment (Details) Details http://generalmills.com/role/EmployeeBenefitPlanScheduleAssetHeldforInvestment 14 false false All Reports Book All Reports gis-20251231.htm gis-20251231.xsd gis-20251231_def.xml gis-20251231_lab.xml gis-20251231_pre.xml gis-20251231_g1.jpg http://fasb.org/us-gaap-ebp/2025 http://xbrl.sec.gov/dei/2025 true false