Segment Reporting - Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	May 29, 2021	May 30, 2020
Segment Reporting
Revenues	$ 6,160,985	$ 6,027,376
Gross Profit	1,284,875	1,198,319
Adjusted EBITDA from continuing operations	138,877	107,392
Additions to property and equipment and intangible assets	64,600	39,174
Retail Pharmacy
Segment Reporting
Revenues	4,351,682	4,123,271
Operating segments | Retail Pharmacy
Segment Reporting
Revenues	4,351,682	4,123,271
Gross Profit	1,169,934	1,081,536
Adjusted EBITDA from continuing operations	94,914	62,982
Additions to property and equipment and intangible assets	60,893	36,607
Operating segments | Pharmacy Services
Segment Reporting
Revenues	1,872,282	1,977,246
Gross Profit	114,941	116,783
Adjusted EBITDA from continuing operations	43,963	44,410
Additions to property and equipment and intangible assets	3,707	2,567
Intersegment elimination
Segment Reporting
Revenues	$ (62,979)	$ (73,141)