Comprehensive Income and Accumulated Other Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 12, 2015	Sep. 06, 2014	Sep. 12, 2015	Sep. 06, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive loss at beginning of the fiscal year, net of tax			$ (423)
Other comprehensive loss before reclassifications			(2)
Amortization of amounts included in net periodic benefit cost	$ 9	$ 7	23	$ 18
Net current-period Other comprehensive income (loss)	8	7	21	18
Accumulated other comprehensive loss at the end of period, net of tax	(402)		(402)
Other comprehensive loss before reclassifications, tax expense			1
Amortization of amounts included in net periodic benefit cost, tax expense			14	10
Other comprehensive income, tax expense			13	10
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive loss at beginning of the fiscal year, net of tax			(423)	(307)
Other comprehensive loss before reclassifications			0	0
Amortization of amounts included in net periodic benefit cost			23	18
Net current-period Other comprehensive income (loss)			23	18
Accumulated other comprehensive loss at the end of period, net of tax	(400)	$ (289)	(400)	$ (289)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive loss at beginning of the fiscal year, net of tax			0
Other comprehensive loss before reclassifications			(2)
Net current-period Other comprehensive income (loss)			(2)
Accumulated other comprehensive loss at the end of period, net of tax	$ (2)		$ (2)