Benefit Plans - Net Periodic Benefit Expense (Income) for Defined Benefit Pension and Other Postretirement Benefit Plans (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 01, 2012	Dec. 03, 2011	Dec. 01, 2012	Dec. 03, 2011
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3	$ 2	$ 9	$ 7
Interest cost	31	32	104	106
Expected return on assets	(34)	(29)	(113)	(96)
Amortization of net actuarial loss	27	21	91	71
Net periodic benefit expense	27	26	91	88
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		1	1	2
Interest cost	1	2	4	6
Amortization of prior service benefit	(3)	(3)	(10)	(6)
Amortization of net actuarial loss	2	1	5	3
Net periodic benefit expense		$ 1		$ 5