ACQUISITIONS - Finite-Lived and Indefinite-Lived Intangible Assets Acquired (Details) $ in Thousands	12 Months Ended
	Aug. 01, 2020 USD ($)
Non-compete agreement | SUPERVALU
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	2 years
Continuing Operations | SUPERVALU
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	$ 945,249
Continuing Operations | Customer relationship assets | SUPERVALU
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	810,000
Continuing Operations | Favorable operating leases | SUPERVALU
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	21,629
Continuing Operations | Leases in place | SUPERVALU
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	10,474
Continuing Operations | Tradenames | SUPERVALU
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	82,000
Continuing Operations | Pharmacy prescription files | SUPERVALU
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	32,900
Continuing Operations | Non-compete agreement | SUPERVALU
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	10,000
Continuing Operations | Unfavorable operating leases | SUPERVALU
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Unfavorable Operating Leases	(21,754)
Discontinued Operations | SUPERVALU
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	14,000
Discontinued Operations | Customer relationship assets | SUPERVALU
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	0
Discontinued Operations | Favorable operating leases | SUPERVALU
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	0
Discontinued Operations | Leases in place | SUPERVALU
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	0
Discontinued Operations | Tradenames | SUPERVALU
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	1,000
Discontinued Operations | Pharmacy prescription files | SUPERVALU
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	13,000
Discontinued Operations | Non-compete agreement | SUPERVALU
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	0
Discontinued Operations | Unfavorable operating leases | SUPERVALU
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Unfavorable Operating Leases	$ 0
Minimum | Customer relationship assets
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	7 years
Minimum | Non-compete agreement
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	2 years
Minimum | Unfavorable operating leases | SUPERVALU
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	1 year
Minimum | Continuing Operations | Customer relationship assets | SUPERVALU
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	10 years
Minimum | Continuing Operations | Favorable operating leases | SUPERVALU
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	1 year
Minimum | Continuing Operations | Leases in place | SUPERVALU
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	1 year
Minimum | Continuing Operations | Tradenames | SUPERVALU
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	2 years
Minimum | Continuing Operations | Pharmacy prescription files | SUPERVALU
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	5 years
Maximum | Customer relationship assets
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	20 years
Maximum | Non-compete agreement
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	10 years
Maximum | Unfavorable operating leases | SUPERVALU
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	12 years
Maximum | Continuing Operations | Customer relationship assets | SUPERVALU
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	17 years
Maximum | Continuing Operations | Favorable operating leases | SUPERVALU
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	19 years
Maximum | Continuing Operations | Leases in place | SUPERVALU
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	8 years
Maximum | Continuing Operations | Tradenames | SUPERVALU
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	9 years
Maximum | Continuing Operations | Pharmacy prescription files | SUPERVALU
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	7 years