Summary of Significant Accounting Policies - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) (USD $) In Millions, unless otherwise specified	4 Months Ended
	Jun. 15, 2013	Jun. 16, 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 $11	(18)	(21)
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	$ 546