Summary of Significant Accounting Policies - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Nov. 30, 2013	Dec. 01, 2012	Nov. 30, 2013	Dec. 01, 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 $28	(13)	(16)	(44)	(56)
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	$ 520		$ 520