Benefit Plans - Net Periodic Benefit Expense and Contribution for Defined Benefit Pension Plans and Other Postretirement Benefit Plans (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
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost
Interest cost	28	28	93	94
Expected return on assets	(33)	(30)	(109)	(102)
Amortization of prior service benefit
Amortization of net actuarial loss	23	26	78	86
Net periodic benefit expense	18	24	62	78
Contributions to benefit plans	(26)	(9)	(118)	(91)
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	2	2
Interest cost	1	1	3	4
Expected return on assets
Amortization of prior service benefit	(3)	(3)	(10)	(10)
Amortization of net actuarial loss	1	1	4	4
Net periodic benefit expense			(1)
Contributions to benefit plans	$ (1)	$ (1)	$ (4)	$ (3)