Summary of Significant Accounting Policies - Schedule of Changes in Accumulated Other Comprehensive Loss (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 22, 2014	Feb. 23, 2013	Feb. 25, 2012
Equity [Abstract]
Other comprehensive income (loss) before reclassifications, amount of tax expense (benefit)	$ (85)	$ 18	$ 161
Amortization of amounts included in net periodic benefit cost, amount of tax (expense)	(38)	(40)	(32)
Other comprehensive income (loss), tax	(123)	(22)	129
Pension plan accumulated other comprehensive loss, tax	$ 31	$ 31	$ 31