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. 10, 2016	Sep. 12, 2015	Sep. 10, 2016	Sep. 12, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive loss at beginning of the fiscal year, net of tax			$ (422)	$ (423)
Other comprehensive loss before reclassifications			(1)	(2)
Amortization of amounts included in net periodic benefit cost			11	23
Amortization of cash flow hedge			1
Total other comprehensive income	$ 5	$ 8	11	21
Accumulated other comprehensive loss at the end of period, net of tax	(411)	(402)	(411)	(402)
Other comprehensive loss before reclassifications, tax benefit			0	(1)
Amortization of amounts included in net periodic benefit cost, tax expense			6	14
Amortization of cash flow hedge, tax expense			0
Net current-period Other comprehensive income, tax expense			6	13
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive loss at beginning of the fiscal year, net of tax			(418)	(423)
Other comprehensive loss before reclassifications			0	0
Amortization of amounts included in net periodic benefit cost			11	23
Amortization of cash flow hedge			0
Total other comprehensive income			11	23
Accumulated other comprehensive loss at the end of period, net of tax	(407)	(400)	(407)	(400)
Other comprehensive loss before reclassifications, tax benefit			0	0
Amortization of amounts included in net periodic benefit cost, tax expense			6	14
Amortization of cash flow hedge, tax expense			0
Net current-period Other comprehensive income, tax expense			6	14
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive loss at beginning of the fiscal year, net of tax			(4)	0
Other comprehensive loss before reclassifications			(1)	(2)
Amortization of amounts included in net periodic benefit cost			0	0
Amortization of cash flow hedge			1
Total other comprehensive income			0	(2)
Accumulated other comprehensive loss at the end of period, net of tax	$ (4)	$ (2)	(4)	(2)
Other comprehensive loss before reclassifications, tax benefit			0	(1)
Amortization of amounts included in net periodic benefit cost, tax expense			0	0
Amortization of cash flow hedge, tax expense			0
Net current-period Other comprehensive income, tax expense			$ 0	$ (1)