DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Sales Revenue by Product Type (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 26, 2022	Feb. 27, 2021	Feb. 29, 2020
Concentration Risk [Line Items]
Net sales and other revenue	$ 71,887.0	$ 69,690.4	$ 62,455.1
Incremental net sales			$ 1,100.0
Sales Revenue, Product Line | Product Concentration Risk
Concentration Risk [Line Items]
Percentage of total net sales and other revenue	100.00%	100.00%	100.00%
Non-perishables
Concentration Risk [Line Items]
Net sales and other revenue	$ 36,486.7	$ 37,520.0	$ 31,897.2
Non-perishables | Sales Revenue, Product Line | Product Concentration Risk
Concentration Risk [Line Items]
Percentage of total net sales and other revenue	50.80%	53.80%	51.10%
Fresh
Concentration Risk [Line Items]
Net sales and other revenue	$ 24,636.8	$ 23,674.5	$ 20,885.8
Fresh | Sales Revenue, Product Line | Product Concentration Risk
Concentration Risk [Line Items]
Percentage of total net sales and other revenue	34.30%	34.00%	33.40%
Pharmacy
Concentration Risk [Line Items]
Net sales and other revenue	$ 5,823.3	$ 5,195.8	$ 5,236.8
Pharmacy | Sales Revenue, Product Line | Product Concentration Risk
Concentration Risk [Line Items]
Percentage of total net sales and other revenue	8.10%	7.40%	8.40%
Fuel
Concentration Risk [Line Items]
Net sales and other revenue	$ 3,747.5	$ 2,236.5	$ 3,430.4
Fuel | Sales Revenue, Product Line | Product Concentration Risk
Concentration Risk [Line Items]
Percentage of total net sales and other revenue	5.20%	3.20%	5.50%
Other
Concentration Risk [Line Items]
Net sales and other revenue	$ 1,192.7	$ 1,063.6	$ 1,004.9
Other | Sales Revenue, Product Line | Product Concentration Risk
Concentration Risk [Line Items]
Percentage of total net sales and other revenue	1.60%	1.60%	1.60%