COMMITMENTS AND CONTINGENCIES AND OFF BALANCE SHEET ARRANGEMENTS - Legal Contingencies (Details) $ in Millions	12 Months Ended
Feb. 27, 2021 USD ($) claim lawsuit
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
Qui Tam Lawsuits \| Pending litigation \| Minimum
Loss Contingencies [Line Items]
Damages sought in a lawsuit \| $	$ 100
Consolidated cases for multidistrict litigation
Loss Contingencies [Line Items]
Number of lawsuits filed against the company \| claim	2,000
Consolidated cases for multidistrict litigation \| Threatened litigation \| Blackfeet Tribe
Loss Contingencies [Line Items]
Number of new claims filed \| claim	70

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

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-Publisher FASB
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-SubTopic 20
-Section 50
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The total number of new claims filed pertaining to a loss contingency during the period.

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Number of pending claims pertaining to a loss contingency.

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