Goodwill and Other Intangible Assets - Goodwill (Details) $ in Thousands	12 Months Ended
	Mar. 04, 2017 USD ($) segment	Feb. 27, 2016 USD ($)
Goodwill
Number of reportable units | segment	2
Goodwill impairment charges	$ 0	$ 0
Carrying amount of goodwill
Balance at beginning of period	1,713,475	76,124
Acquisition (see Note 2. Acquisition)		1,637,351
Change in goodwill resulting from changes to the final purchase price allocation	2,004
Balance at end of period	1,715,479	1,713,475
Retail Pharmacy
Carrying amount of goodwill
Balance at beginning of period	76,124	76,124
Balance at end of period	76,124	76,124
Pharmacy Services
Carrying amount of goodwill
Balance at beginning of period	1,637,351
Acquisition (see Note 2. Acquisition)		1,637,351
Change in goodwill resulting from changes to the final purchase price allocation	2,004
Balance at end of period	$ 1,639,355	$ 1,637,351