EMPLOYEE BENEFIT PLANS AND COLLECTIVE BARGAINING AGREEMENTS - Schedule of Plan Assets Allocation (Details) - Pension	Feb. 27, 2021	Feb. 29, 2020
Safeway Plan
Defined Benefit Plan Disclosure [Line Items]
Target	100.00%
Plan Assets	100.00%	100.00%
Safeway Plan | Equity
Defined Benefit Plan Disclosure [Line Items]
Target	65.00%
Plan Assets	68.30%	64.00%
Safeway Plan | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Target	35.00%
Plan Assets	31.20%	39.20%
Safeway Plan | Cash and other
Defined Benefit Plan Disclosure [Line Items]
Target	0.00%
Plan Assets	0.50%	(3.20%)
Shaw's Plan
Defined Benefit Plan Disclosure [Line Items]
Target	100.00%
Plan Assets	100.00%	100.00%
Shaw's Plan | Equity
Defined Benefit Plan Disclosure [Line Items]
Target	65.00%
Plan Assets	69.20%	64.50%
Shaw's Plan | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Target	35.00%
Plan Assets	28.20%	35.40%
Shaw's Plan | Cash and other
Defined Benefit Plan Disclosure [Line Items]
Target	0.00%
Plan Assets	2.60%	0.10%
United Plan
Defined Benefit Plan Disclosure [Line Items]
Target	100.00%
Plan Assets	100.00%	100.00%
United Plan | Equity
Defined Benefit Plan Disclosure [Line Items]
Target	50.00%
Plan Assets	45.00%	47.80%
United Plan | Equity | Maximum
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	60.00%
United Plan | Equity | Minimum
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	40.00%
United Plan | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Target	50.00%
Plan Assets	55.00%	50.40%
United Plan | Cash and other
Defined Benefit Plan Disclosure [Line Items]
Target	0.00%
Plan Assets	0.00%	1.80%