EMPLOYEE BENEFIT PLANS AND COLLECTIVE BARGAINING AGREEMENTS - Schedule of Multiemployer Plan (Details) - Pension $ in Millions	12 Months Ended
	Feb. 27, 2021 USD ($) agreement	Feb. 29, 2020 USD ($)	Feb. 23, 2019 USD ($)
Multiemployer Plans [Line Items]
Contributions by Company | $	$ 524.0	$ 469.3	$ 451.1
UFCW-Northern California Employers Joint Pension Trust Fund
Multiemployer Plans [Line Items]
Contributions by Company | $	$ 123.2	103.8	104.4
Total collective bargaining agreements	83
Most significant collective bargaining agreement	78
Western Conference of Teamsters Pension Plan
Multiemployer Plans [Line Items]
Contributions by Company | $	$ 66.9	64.9	63.7
Total collective bargaining agreements	51
Most significant collective bargaining agreement	10
Southern California United Food & Commercial Workers Unions and Food Employers Joint Pension Plan
Multiemployer Plans [Line Items]
Contributions by Company | $	$ 133.7	116.1	108.4
Total collective bargaining agreements	43
Most significant collective bargaining agreement	41
Food Employers Labor Relations Association and United Food and Commercial Workers Pension Fund (8)
Multiemployer Plans [Line Items]
Contributions by Company | $	$ 19.3	18.8	20.4
Total collective bargaining agreements	21
Most significant collective bargaining agreement	15
Sound Retirement Trust
Multiemployer Plans [Line Items]
Contributions by Company | $	$ 53.8	44.3	39.1
Total collective bargaining agreements	119
Most significant collective bargaining agreement	14
Bakery and Confectionery Union and Industry International Pension Fund
Multiemployer Plans [Line Items]
Contributions by Company | $	$ 18.7	18.5	17.4
Total collective bargaining agreements	107
Most significant collective bargaining agreement	33
UFCW Union and Participating Food Industry Employers Tri-State Pension Fund
Multiemployer Plans [Line Items]
Contributions by Company | $	$ 12.0	14.9	14.0
Total collective bargaining agreements	6
Most significant collective bargaining agreement	2
Rocky Mountain UFCW Unions & Employers Pension Plan
Multiemployer Plans [Line Items]
Contributions by Company | $	$ 15.5	12.3	10.8
Total collective bargaining agreements	85
Most significant collective bargaining agreement	27
UFCW Local 152 Retail Meat Pension Fund
Multiemployer Plans [Line Items]
Contributions by Company | $	$ 11.1	10.9	10.8
Total collective bargaining agreements	4
Most significant collective bargaining agreement	4
Desert States Employers & UFCW Unions Pension Plan
Multiemployer Plans [Line Items]
Contributions by Company | $	$ 8.9	8.9	9.1
Total collective bargaining agreements	16
Most significant collective bargaining agreement	13
UFCW International Union - Industry Pension Fund
Multiemployer Plans [Line Items]
Contributions by Company | $	$ 4.6	9.5	13.1
Total collective bargaining agreements	20
Most significant collective bargaining agreement	6
Mid Atlantic Pension Fund (8)
Multiemployer Plans [Line Items]
Contributions by Company | $	$ 7.3	7.4	6.6
Total collective bargaining agreements	(8)
Most significant collective bargaining agreement	(8)
Retail Food Employers and UFCW Local 711 Pension Trust Fund
Multiemployer Plans [Line Items]
Contributions by Company | $	$ 8.6	7.3	7.1
Total collective bargaining agreements	7
Most significant collective bargaining agreement	4
Oregon Retail Employees Pension Trust
Multiemployer Plans [Line Items]
Contributions by Company | $	$ 10.0	8.9	7.6
Total collective bargaining agreements	142
Most significant collective bargaining agreement	25
Intermountain Retail Store Employees Pension Trust
Multiemployer Plans [Line Items]
Contributions by Company | $	$ 6.9	5.8	4.8
Total collective bargaining agreements	56
Most significant collective bargaining agreement	13
Other funds
Multiemployer Plans [Line Items]
Contributions by Company | $	$ 23.5	$ 17.0	$ 13.8