Label	Element	Value
Adjustments To Additional Paid In Capital, Units Issued Net Of Tax Withholdings	aci_AdjustmentsToAdditionalPaidInCapitalUnitsIssuedNetOfTaxWithholdings	$ (100,000)
Other Comprehensive Income (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossNetOfTax	39,300,000
Other Comprehensive Income (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossNetOfTax	164,600,000
Capital Units, Value, Units Issued Net Of Tax Withholding	aci_CapitalUnitsValueUnitsIssuedNetOfTaxWithholding	(17,400,000)
Members' Equity, Other	aci_MembersEquityOther	(1,600,000)
Incentive Distribution, Distribution	us-gaap_IncentiveDistributionDistributionPerYear	250,000,000.0
Limited Liability Company (LLC) Members' Equity, Unit-based Payment Arrangement	us-gaap_LimitedLiabilityCompanyLLCMembersEquityUnitBasedCompensation	24,600,000
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	21,300,000
Member Units [Member] | Albertsons Companies, LLC [Member]
Stockholders' Equity, Change in Reporting Entity	us-gaap_StockholdersEquityChangeInReportingEntity	(1,754,900,000)
Capital Units, Value, Units Issued Net Of Tax Withholding	aci_CapitalUnitsValueUnitsIssuedNetOfTaxWithholding	(17,400,000)
Members' Equity, Other	aci_MembersEquityOther	(1,600,000)
Incentive Distribution, Distribution	us-gaap_IncentiveDistributionDistributionPerYear	250,000,000.0
Limited Liability Company (LLC) Members' Equity, Unit-based Payment Arrangement	us-gaap_LimitedLiabilityCompanyLLCMembersEquityUnitBasedCompensation	24,600,000
Additional Paid-in Capital [Member]
Adjustments To Additional Paid In Capital, Units Issued Net Of Tax Withholdings	aci_AdjustmentsToAdditionalPaidInCapitalUnitsIssuedNetOfTaxWithholdings	(100,000)
Stockholders' Equity, Change in Reporting Entity	us-gaap_StockholdersEquityChangeInReportingEntity	1,749,100,000
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	21,300,000
Retained Earnings [Member]
Stockholders' Equity, Change in Reporting Entity	us-gaap_StockholdersEquityChangeInReportingEntity	(957,300,000)
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss	388,300,000
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	558,000,000.0
Retained Earnings [Member] | Albertsons Companies, LLC [Member]
Stockholders' Equity, Change in Reporting Entity	us-gaap_StockholdersEquityChangeInReportingEntity	957,300,000
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss	(342,000,000.0)
Common Stock [Member]
Stockholders' Equity, Change in Reporting Entity	us-gaap_StockholdersEquityChangeInReportingEntity	$ 5,800,000
Stock Issued During Period, Shares, Change In Reporting Entity	aci_StockIssuedDuringPeriodSharesChangeInReportingEntity	579,443,146
AOCI Attributable to Parent [Member]
Stockholders' Equity, Change in Reporting Entity	us-gaap_StockholdersEquityChangeInReportingEntity	$ 26,500,000
Other Comprehensive Income (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossNetOfTax	164,600,000
AOCI Attributable to Parent [Member] | Albertsons Companies, LLC [Member]
Stockholders' Equity, Change in Reporting Entity	us-gaap_StockholdersEquityChangeInReportingEntity	(26,500,000)
Other Comprehensive Income (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossNetOfTax	$ 39,300,000