EMPLOYEE BENEFIT PLANS AND COLLECTIVE BARGAINING AGREEMENTS - Schedule of Plan Assets Allocation (Details) - Pension	Feb. 26, 2022	Feb. 27, 2021
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	65.40%	68.30%
Safeway Plan | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Target	35.00%
Plan Assets	32.70%	31.20%
Safeway Plan | Cash and other
Defined Benefit Plan Disclosure [Line Items]
Target	0.00%
Plan Assets	1.90%	0.50%
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	60.50%	69.20%
Shaw's Plan | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Target	35.00%
Plan Assets	31.10%	28.20%
Shaw's Plan | Cash and other
Defined Benefit Plan Disclosure [Line Items]
Target	0.00%
Plan Assets	8.40%	2.60%
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	48.10%	45.00%
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	41.40%	55.00%
United Plan | Cash and other
Defined Benefit Plan Disclosure [Line Items]
Target	0.00%
Plan Assets	10.50%	0.00%