Summary of Significant Accounting Policies - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 07, 2013	Sep. 08, 2012	Sep. 07, 2013	Sep. 08, 2012
Equity [Abstract]
Pension and postretirement benefit plan accumulated other comprehensive loss at beginning of the fiscal year, net of tax			$ 612
Other comprehensive income, net of tax of $19	(13)	(19)	(31)	(40)
Divestiture of certain NAI pension plan obligation's accumulated other comprehensive loss, net of tax of $31			(48)
Pension and postretirement benefit plan accumulated other comprehensive loss at the end of period, net of tax	$ 533		$ 533