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Segment Reporting - Balance Sheet information (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 03, 2018	Mar. 04, 2017	Feb. 27, 2016	Jun. 24, 2015
Segment Reporting
Total Assets	$ 8,989,327	$ 11,593,752
Goodwill	1,421,120	1,682,847	$ 1,680,843
Additions to property and equipment and intangible assets	214,764	293,797
Accounts receivable	1,869,100	1,771,126
Retail Pharmacy
Segment Reporting
Goodwill	43,492	43,492	43,492
Pharmacy Services
Segment Reporting
Goodwill	1,377,628	1,639,355	$ 1,637,351	$ 1,639,355
Operating segments \| Retail Pharmacy
Segment Reporting
Total Assets	6,089,343	8,664,216
Goodwill	43,492	43,492
Additions to property and equipment and intangible assets	199,437	281,072
Operating segments \| Pharmacy Services
Segment Reporting
Total Assets	2,954,953	3,087,143
Goodwill	1,377,628	1,639,355
Additions to property and equipment and intangible assets	15,327	12,725
Intersegment elimination
Segment Reporting
Total Assets	(54,969)	(157,607)
Long-term deferred tax liability	38,713	140,865
Accounts receivable	$ 16,256	$ 16,742