Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended
	May 28, 2022	May 29, 2021
Restructuring related liabilities
Restructuring expense	$ 22,646	$ 5,932
Anticipated restructuring-related costs	60,000
Reorganization Of Executive Management Team, Ongoing Workforce Reduction And Consolidation, And Transformation Initiatives [Member]
Restructuring related liabilities
Balance-beginning of period	8,720
Restructuring expense	22,646	5,932
Cash payments	(16,958)
Balance-end of period	14,408
Reorganization Of Executive Management Team, Ongoing Workforce Reduction And Consolidation, And Transformation Initiatives [Member] | Selling, general and administrative expenses
Restructuring related liabilities
Restructuring expense	22,646
Severance and related costs
Restructuring related liabilities
Balance-beginning of period	4,257
Restructuring expense	11,904	506
Cash payments	(5,231)
Balance-end of period	10,930
Severance and related costs | Selling, general and administrative expenses
Restructuring related liabilities
Restructuring expense	11,904
Professional and other fees
Restructuring related liabilities
Balance-beginning of period	4,463
Restructuring expense	10,742	5,426
Cash payments	(11,727)
Balance-end of period	3,478
Professional and other fees | Selling, general and administrative expenses
Restructuring related liabilities
Restructuring expense	10,742
Retail Pharmacy | Reorganization Of Executive Management Team, Ongoing Workforce Reduction And Consolidation, And Transformation Initiatives [Member]
Restructuring related liabilities
Restructuring expense		1,621
Retail Pharmacy | Reorganization Of Executive Management Team, Ongoing Workforce Reduction And Consolidation, And Transformation Initiatives [Member] | Selling, general and administrative expenses
Restructuring related liabilities
Restructuring expense	17,371
Retail Pharmacy | Severance and related costs | Selling, general and administrative expenses
Restructuring related liabilities
Restructuring expense	11,288
Retail Pharmacy | Professional and other fees
Restructuring related liabilities
Restructuring expense		1,621
Retail Pharmacy | Professional and other fees | Selling, general and administrative expenses
Restructuring related liabilities
Restructuring expense	6,083
Pharmacy Services | Reorganization Of Executive Management Team, Ongoing Workforce Reduction And Consolidation, And Transformation Initiatives [Member]
Restructuring related liabilities
Restructuring expense		4,311
Pharmacy Services | Reorganization Of Executive Management Team, Ongoing Workforce Reduction And Consolidation, And Transformation Initiatives [Member] | Selling, general and administrative expenses
Restructuring related liabilities
Restructuring expense	5,275
Pharmacy Services | Severance and related costs
Restructuring related liabilities
Restructuring expense		506
Pharmacy Services | Severance and related costs | Selling, general and administrative expenses
Restructuring related liabilities
Restructuring expense	616
Pharmacy Services | Professional and other fees
Restructuring related liabilities
Restructuring expense		$ 3,805
Pharmacy Services | Professional and other fees | Selling, general and administrative expenses
Restructuring related liabilities
Restructuring expense	$ 4,659