Basis of Presentation and Significant Accounting Policies - Sales (Details) - USD ($) $ in Thousands	3 Months Ended
	May 28, 2022	May 29, 2021
Product Class
Total revenue	$ 6,014,583	$ 6,160,985
Intersegment elimination
Product Class
Revenues	(56,630)	(62,979)
Total revenue	(56,630)	(62,979)
Retail Pharmacy
Product Class
Other revenue	30,701	32,939
Total revenue	4,345,356	4,351,682
Pharmacy sales
Product Class
Revenues	3,053,449	2,997,044
Front end sales
Product Class
Revenues	1,261,206	1,321,699
Pharmacy Services
Product Class
Revenues	$ 1,725,857	$ 1,872,282