Goodwill and Intangible Assets, Net - Change in Company's Goodwill and Intangible Assets (Detail) - USD ($) $ in Millions	6 Months Ended
	Sep. 10, 2016	Sep. 12, 2015
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 867
Goodwill, Additions	1
Goodwill, Impairments	0
Goodwill, Other net adjustments	0
Goodwill, Ending Balance	868
Finite-lived Intangible Assets [Roll Forward]
Total intangible assets, Beginning balance	154
Total intangible assets, Additions	1
Total intangible assets, Impairments	0
Total intangible assets, Other net adjustments	(1)
Total intangible assets, Ending balance	154
Total intangible assets, net	55
Total intangible assets, net, Ending balance	50
Intangible Assets Accumulated Amortization [Roll Forward]
Accumulated amortization, Beginning balance	(99)
Accumulated amortization, Additions	(6)	$ (6)
Accumulated amortization, Other net adjustments	1
Accumulated amortization, Ending balance	(104)
Save-A-Lot [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	142
Goodwill, Additions	1
Goodwill, Impairments	0
Goodwill, Other net adjustments	0
Goodwill, Ending Balance	143
Wholesale [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	710
Goodwill, Additions	0
Goodwill, Impairments	0
Goodwill, Other net adjustments	0
Goodwill, Ending Balance	710
Retail [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	15
Goodwill, Additions	0
Goodwill, Impairments	0
Goodwill, Other net adjustments	0
Goodwill, Ending Balance	15
Trademarks and Tradenames - Indefinite Useful Lives [Member]
Indefinite-lived Intangible Assets [Roll Forward]
Indefinite-lived Intangible Assets, Beginning Balance	9
Indefinite-lived Intangible Assets, Additions	0
Indefinite-lived Intangible Assets, Impairments	0
Indefinite-lived Intangible Assets, Other net adjustments	0
Indefinite-lived Intangible Assets, Ending Balance	9
Operating leases, Prescription files, Customer Lists And Other [Member]
Finite-lived Intangible Assets [Roll Forward]
Finite-lived Intangible Assets, Beginning Balance	142
Finite-lived Intangible Assets, Additions	1
Finite-lived Intangible Assets, Impairments	0
Finite-lived Intangible Assets, Other net adjustments	(1)
Finite-lived Intangible Assets, Ending Balance	142
Intangible Assets Accumulated Amortization [Roll Forward]
Accumulated amortization, Beginning balance	(97)
Accumulated amortization, Ending balance	(102)
Non-Compete Agreements [Member]
Finite-lived Intangible Assets [Roll Forward]
Finite-lived Intangible Assets, Beginning Balance	3
Finite-lived Intangible Assets, Additions	0
Finite-lived Intangible Assets, Impairments	0
Finite-lived Intangible Assets, Other net adjustments	0
Finite-lived Intangible Assets, Ending Balance	3
Intangible Assets Accumulated Amortization [Roll Forward]
Accumulated amortization, Beginning balance	(2)
Accumulated amortization, Ending balance	$ (2)