Comprehensive Income and Accumulated Other Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 06, 2014	Sep. 07, 2013	Sep. 06, 2014	Sep. 07, 2013
Equity [Abstract]
Pension and postretirement benefit plan accumulated other comprehensive loss at beginning of the fiscal year, net of tax			$ 307	$ 612
Other comprehensive (income) loss before reclassifications, net of tax expense of $0 and $0, respectively
Amortization of amounts included in net periodic benefit cost, net of tax expense of $10 and $19, respectively			(18)	(31)
Net current-period Other comprehensive income, net of tax expense of $10 and $19, respectively	(7)	(13)	(18)	(31)
Divestiture of NAI pension plan accumulated other comprehensive income, net of tax expense of $0 and $31, respectively				(48)
Pension and postretirement benefit plan accumulated other comprehensive loss at the end of period, net of tax	$ 289	$ 533	$ 289	$ 533