Segment Reporting - Balance Sheet information (Details) $ in Thousands	3 Months Ended
Jun. 01, 2019 USD ($) segment	Mar. 02, 2019 USD ($)	Jun. 02, 2018 USD ($)
Segment Reporting
Number of reportable segments \| segment	2
Total assets	$ 10,529,689	$ 7,591,367
Goodwill	1,108,136	1,108,136
Accounts receivable	1,803,778	1,788,712
Operating segments \| Retail Pharmacy
Segment Reporting
Total assets	7,918,381	5,071,055
Goodwill	43,492	43,492
Operating segments \| Pharmacy Services
Segment Reporting
Total assets	2,628,214	2,534,771
Goodwill	1,064,644	1,064,644
Intersegment elimination
Segment Reporting
Total assets	(16,906)	(14,459)
Long-term deferred tax liability	0	$ 0
Accounts receivable	$ (16,906)		$ (14,459)

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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