Segment Reporting - Revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 04, 2023	Feb. 26, 2022	Feb. 27, 2021
Segment Reporting
Revenues	$ 24,091,899	$ 24,568,255	$ 24,043,240
Gross Profit	4,803,940	5,106,495	4,704,322
Adjusted EBITDA	429,180	505,905	437,665
Depreciation and amortization	276,583	295,686	327,124
LIFO charge (credit)	53,028	1,314	(51,692)
Stock-based compensation expense	11,537	13,050	13,003
Restructuring-related costs	108,626	35,121	84,552
Additions to property and equipment and intangible assets	247,685	220,713	224,941
SKU Optimization Charges [Member]
Segment Reporting
Restructuring-related costs			20,939
Retail Pharmacy Segment
Segment Reporting
Revenues	17,785,067	17,494,816	16,365,260
Operating Segments | Retail Pharmacy Segment
Segment Reporting
Revenues	17,785,067	17,494,816	16,365,260
Gross Profit	4,394,850	4,722,075	4,255,791
Adjusted EBITDA	288,077	392,633	279,896
Depreciation and amortization	229,380	244,122	269,985
LIFO charge (credit)	53,028	1,314	(51,692)
Stock-based compensation expense	10,604	12,282	11,594
Additions to property and equipment and intangible assets	226,563	202,386	204,290
Operating Segments | Retail Pharmacy Segment | SKU Optimization Charges [Member]
Segment Reporting
Restructuring-related costs			20,939
Operating Segments | Pharmacy Services Segment
Segment Reporting
Revenues	6,522,299	7,323,125	7,970,137
Gross Profit	409,090	384,420	448,531
Adjusted EBITDA	141,103	113,272	157,769
Depreciation and amortization	47,203	51,564	57,139
LIFO charge (credit)
Stock-based compensation expense	933	768	1,409
Additions to property and equipment and intangible assets	21,122	18,327	20,651
Operating Segments | Pharmacy Services Segment | SKU Optimization Charges [Member]
Segment Reporting
Restructuring-related costs
Intersegment eliminations
Segment Reporting
Revenues	(215,467)	(249,686)	(292,157)
Gross Profit
Adjusted EBITDA
Depreciation and amortization
LIFO charge (credit)
Stock-based compensation expense
Additions to property and equipment and intangible assets
Intersegment eliminations | SKU Optimization Charges [Member]
Segment Reporting
Restructuring-related costs