Goodwill and Intangible Assets - Change in Company's Goodwill and Intangible Assets (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 02, 2017	Dec. 03, 2016	Dec. 02, 2017	Dec. 03, 2016
Goodwill [Roll Forward]
Goodwill, Beginning Balance			$ 710
Goodwill, Additions			29
Goodwill, Impairment Loss	$ 0	$ (15)	0	$ (15)
Goodwill, Other net adjustments			0
Goodwill, Ending Balance	739		739
Indefinite-lived Intangible Assets [Roll Forward]
Total intangible assets, Beginning balance			146
Total intangible assets, Additions			54
Total intangible assets, Impairments			0
Total intangible assets, Other net adjustments			(2)
Total intangible assets, Ending balance	198		198
Intangible Assets Accumulated Amortization [Roll Forward]
Accumulated amortization, Beginning balance			(107)
Accumulated amortization, Additions			(10)	$ (7)
Accumulated amortization, Other net adjustments			2
Accumulated amortization, Ending balance	(115)		(115)
Total intangible assets, net, Beginning balance			39
Total intangible assets, net, Ending balance	83		83
Trademarks and Tradenames - Indefinite Useful Lives
Indefinite-lived Intangible Assets [Roll Forward]
Indefinite-lived Intangible Assets, Beginning Balance			5
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	5		5
Operating leases, Prescription files, Customer Lists And Other
Finite-lived Intangible Assets [Roll Forward]
Finite-lived Intangible Assets, Beginning Balance			141
Finite-lived Intangible Assets, Additions			54
Finite-lived Intangible Assets, Impairments			0
Finite-lived Intangible Assets, Other net adjustments			(2)
Finite-lived Intangible Assets, Ending Balance	$ 193		$ 193