Goodwill and Intangible Assets, Net - Change in Company's Goodwill and Intangible Assets (Detail) - USD ($) $ in Millions	6 Months Ended
	Sep. 12, 2015	Sep. 06, 2014	Feb. 28, 2015
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 865
Additions	0
Goodwill, Impairment Loss	0
Goodwill, Other Changes	0
Goodwill, Ending Balance	865
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, Beginning balance	136
Addition to Intangible Assets	24
Impairment of Intangible Assets (Excluding Goodwill)	0
Intangible Assets Other Adjustments	0
Intangible assets, Ending balance	160
Intangible Assets Accumulated Amortization [Roll Forward]
Accumulated amortization, Beginning balance	(88)
Amortization expense of intangible assets	(6)	$ (5)
Intangible Assets Accumulated Amortization, Other Net Adjustments	0
Accumulated amortization, Ending Balance	(94)
Total intangible assets, net	66		$ 48
Independent Business [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	710
Additions	0
Goodwill, Impairment Loss	0
Goodwill, Other Changes	0
Goodwill, Ending Balance	710
Save-A-Lot [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	141
Additions	0
Goodwill, Impairment Loss	0
Goodwill, Other Changes	0
Goodwill, Ending Balance	141
Retail Food [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	14
Additions	0
Goodwill, Impairment Loss	0
Goodwill, Other Changes	0
Goodwill, Ending Balance	14
Trademarks and Tradenames - Indefinite Useful Lives [Member]
Indefinite-lived Intangible Assets [Roll Forward]
Indefinite-lived Intangible Assets, Beginning Balance	9
Indefinite-lived Intangible Assets Acquired	0
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	0
Indefinite-lived Intangible Assets, Period Increase (Decrease)	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	124
Addition to Finite-Lived Intangible Assets	24
Impairment of Intangible Assets, Finite-lived	0
Finite Lived Intangible Assets Other Net Adjustments	0
Finite-Lived Intangible Assets, Ending Balance	148
Intangible Assets Accumulated Amortization [Roll Forward]
Accumulated amortization, Beginning balance	(86)
Accumulated amortization, Ending Balance	(92)
Non-Compete Agreements [Member]
Finite-lived Intangible Assets [Roll Forward]
Finite-Lived Intangible Assets, Beginning Balance	3
Addition to Finite-Lived Intangible Assets	0
Impairment of Intangible Assets, Finite-lived	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)