COMMITMENTS AND CONTINGENCIES AND OFF BALANCE SHEET ARRANGEMENTS - Legal Contingencies (Details) $ in Millions	9 Months Ended
Dec. 05, 2020 USD ($) lawsuit claim
Safeway's 401(k) Plan \| Pending litigation \| Safeway Inc
Loss Contingencies [Line Items]
Number of lawsuits filed against the company \| lawsuit	2
Qui Tam Lawsuits \| Pending litigation
Loss Contingencies [Line Items]
Number of lawsuits filed against the company \| lawsuit	2
Loss contingency, amount of damages sought (in excess of) \| $	$ 100
Various State Courts \| Threatened litigation
Loss Contingencies [Line Items]
Number of lawsuits filed against the company \| claim	70
Consolidated Cases for Multidistrict Litigation
Loss Contingencies [Line Items]
Number of lawsuits filed against the company \| claim	2,000

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

Name:	us-gaap_LossContingencyDamagesSoughtValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration