Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Aug. 27, 2022	May 28, 2022	Aug. 28, 2021	Aug. 27, 2022	Aug. 28, 2021
Restructuring related costs
Total restructuring-related costs	$ 12,805		$ 9,584	$ 35,451	$ 15,516
Anticipated restructuring-related costs during fiscal 2023	72,000			72,000
Reorganization Of Executive Management Team, Ongoing Workforce Reduction And Consolidation, And Transformation Initiatives [Member] | Selling, general and administrative expenses
Restructuring related costs
Balance-beginning of period	14,408	$ 8,720		8,720
Additions charged to expense	12,805	22,646
Cash payments	(12,848)	(16,958)
Balance-end of period	14,365	14,408		14,365
Total restructuring-related costs	12,805		9,584	35,451	15,516
Severance and related costs | Selling, general and administrative expenses
Restructuring related costs
Balance-beginning of period	10,930	4,257		4,257
Additions charged to expense	913	11,904
Cash payments	(2,782)	(5,231)
Balance-end of period	9,061	10,930		9,061
Total restructuring-related costs	913		495	12,817	1,001
Professional and other fees | Selling, general and administrative expenses
Restructuring related costs
Balance-beginning of period	3,478	4,463		4,463
Additions charged to expense	11,892	10,742
Cash payments	(10,066)	(11,727)
Balance-end of period	5,304	$ 3,478		5,304
Total restructuring-related costs	11,892		9,089	22,634	14,515
Retail Pharmacy | Reorganization Of Executive Management Team, Ongoing Workforce Reduction And Consolidation, And Transformation Initiatives [Member] | Selling, general and administrative expenses
Restructuring related costs
Total restructuring-related costs	8,442		2,584	25,813	4,205
Retail Pharmacy | Severance and related costs | Selling, general and administrative expenses
Restructuring related costs
Total restructuring-related costs	913			12,201
Retail Pharmacy | Professional and other fees | Selling, general and administrative expenses
Restructuring related costs
Total restructuring-related costs	7,529		2,584	13,612	4,205
Pharmacy Services | Reorganization Of Executive Management Team, Ongoing Workforce Reduction And Consolidation, And Transformation Initiatives [Member] | Selling, general and administrative expenses
Restructuring related costs
Total restructuring-related costs	4,363		7,000	9,638	11,311
Pharmacy Services | Severance and related costs | Selling, general and administrative expenses
Restructuring related costs
Total restructuring-related costs			495	616	1,001
Pharmacy Services | Professional and other fees | Selling, general and administrative expenses
Restructuring related costs
Total restructuring-related costs	$ 4,363		$ 6,505	$ 9,022	$ 10,310