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Summary of Significant Accounting Policies - Sales (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 04, 2023	Feb. 26, 2022	Feb. 27, 2021
Product Class
Revenues	$ 24,091,899	$ 24,568,255	$ 24,043,240
Intersegment eliminations
Product Class
Revenues	(215,467)	(249,686)	(292,157)
Front end sales
Product Class
Revenues	5,078,820
Retail Pharmacy Segment
Product Class
Other revenue	123,654	124,143	126,875
Revenues	17,785,067	17,494,816	16,365,260
Retail Pharmacy Segment \| Pharmacy sales
Product Class
Revenues	12,582,593	12,152,491	10,915,442
Retail Pharmacy Segment \| Front end sales
Product Class
Revenues	$ 5,078,820	$ 5,218,182	$ 5,322,943
Retail Pharmacy Segment \| Prescription drugs \| Revenue from Contract with Customer, Segment Benchmark [Member] \| Product Concentration Risk [Member]
Product Class
Percentage of sales	71.20%	70.00%	66.70%
Retail Pharmacy Segment \| Over-the-counter medications and personal care \| Revenue from Contract with Customer, Segment Benchmark [Member] \| Product Concentration Risk [Member]
Product Class
Percentage of sales	10.90%
Retail Pharmacy Segment \| Health and beauty aids \| Revenue from Contract with Customer, Segment Benchmark [Member] \| Product Concentration Risk [Member]
Product Class
Percentage of sales	4.30%
Retail Pharmacy Segment \| General merchandise and other \| Revenue from Contract with Customer, Segment Benchmark [Member] \| Product Concentration Risk [Member]
Product Class
Percentage of sales	13.60%
Pharmacy Services Segment
Product Class
Revenues	$ 6,522,299	$ 7,323,125	$ 7,970,137
Pharmacy Services Segment \| Pharmacy sales
Product Class
Revenues	$ 12,582,593