Basis of Presentation and Summary of Significant Accounting Policies - Sales Revenue by Similar Products (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 01, 2018	Dec. 02, 2017	Dec. 01, 2018	Dec. 02, 2017
Concentration Risk [Line Items]
Net sales and other revenue	$ 13,840.4	$ 13,599.2	$ 46,517.9	$ 45,890.9
Sales Revenue, Product Line | Product Concentration Risk
Concentration Risk [Line Items]
Net sales and other revenue	$ 13,840.4	$ 13,599.2	$ 46,517.9	$ 45,890.9
Percentage of total net sales and other revenue	100.00%	100.00%	100.00%	100.00%
Non-perishables | Sales Revenue, Product Line | Product Concentration Risk
Concentration Risk [Line Items]
Net sales and other revenue	$ 6,032.9	$ 6,039.9	$ 20,186.0	$ 20,278.6
Percentage of total net sales and other revenue	43.60%	44.40%	43.40%	44.30%
Perishables | Sales Revenue, Product Line | Product Concentration Risk
Concentration Risk [Line Items]
Net sales and other revenue	$ 5,596.5	$ 5,453.1	$ 19,099.1	$ 18,783.6
Percentage of total net sales and other revenue	40.50%	40.20%	41.00%	40.90%
Pharmacy | Sales Revenue, Product Line | Product Concentration Risk
Concentration Risk [Line Items]
Net sales and other revenue	$ 1,194.5	$ 1,187.1	$ 3,847.0	$ 3,858.2
Percentage of total net sales and other revenue	8.60%	8.70%	8.30%	8.40%
Fuel | Sales Revenue, Product Line | Product Concentration Risk
Concentration Risk [Line Items]
Net sales and other revenue	$ 831.3	$ 739.6	$ 2,785.4	$ 2,399.3
Percentage of total net sales and other revenue	6.00%	5.40%	6.00%	5.20%
Other | Sales Revenue, Product Line | Product Concentration Risk
Concentration Risk [Line Items]
Net sales and other revenue	$ 185.2	$ 179.5	$ 600.4	$ 571.2
Percentage of total net sales and other revenue	1.30%	1.30%	1.30%	1.20%