Benefit Plans - Net Periodic Benefit Expense and Contributions for Defined Benefit Pension Plans and Other Postretirement Benefit Plans (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Nov. 29, 2014	Nov. 30, 2013	Nov. 29, 2014	Nov. 30, 2013
Defined Benefit Plan Disclosure [Line Items]
Pension settlement charge			$ 36	$ 0
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	28	28	94	93
Expected return on assets	(35)	(33)	(118)	(109)
Amortization of prior service benefit	0	0	0	0
Amortization of net actuarial loss	15	23	49	78
Pension settlement charge	63	0	63	0
Net periodic benefit expense (income)	71	18	88	62
Contributions to benefit plans	(47)	(26)	(114)	(118)
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	1	0	2
Interest cost	1	1	3	3
Expected return on assets	0	0	0	0
Amortization of prior service benefit	(4)	(3)	(12)	(10)
Amortization of net actuarial loss	1	1	3	4
Pension settlement charge	0	0	0	0
Net periodic benefit expense (income)	(2)	0	(6)	(1)
Contributions to benefit plans	$ 0	$ (1)	$ (1)	$ (4)