Segment Reporting - Balance Sheet information (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Dec. 01, 2018	Mar. 03, 2018	Mar. 04, 2018
Segment Reporting
Total assets	$ 8,082,958	$ 8,989,327	$ 8,980,779
Goodwill	1,108,135	1,421,120
Additions to property and equipment and intangible assets	170,791	214,764
Accounts receivable	1,717,830	1,869,100	$ 1,811,203
Retail Pharmacy
Segment Reporting
Goodwill	43,492	43,492
Pharmacy Services
Segment Reporting
Goodwill	1,064,643	1,377,628
Operating segments \| Retail Pharmacy
Segment Reporting
Total assets	5,406,813	6,089,343
Goodwill	43,492	43,492
Additions to property and equipment and intangible assets	159,706	199,437
Operating segments \| Pharmacy Services
Segment Reporting
Total assets	2,692,023	2,954,953
Goodwill	1,064,643	1,377,628
Additions to property and equipment and intangible assets	11,085	15,327
Intersegment elimination
Segment Reporting
Total assets	(15,878)	(54,969)
Long-term deferred tax liability	0	(38,713)
Accounts receivable	$ (15,878)	$ (16,256)

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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