Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 03, 2011	Dec. 04, 2010	Dec. 03, 2011	Dec. 04, 2010
Benefit Plans (Textual) [Abstract]
Contribution to Pension Plans			$ 85
Contribution to other postretirement benefits plan			2
Contribution to Multi-Employer Plans			101	105
Reduction in postretirement benefit obligation			39
Pension Benefits [Member]
Net periodic benefit expense (income) for defined benefit pension plans and other postretirement benefit plans
Service cost	2	2	7	6
Interest cost	32	31	106	105
Expected return on assets	(29)	(28)	(96)	(94)
Amortization of net actuarial loss	21	15	71	50
Net periodic benefit expense	26	20	88	67
Other Postretirement Benefits [Member]
Net periodic benefit expense (income) for defined benefit pension plans and other postretirement benefit plans
Service cost	1		2	1
Interest cost	2	2	6	6
Amortization of prior service benefit	(3)	(1)	(6)	(4)
Amortization of net actuarial loss	1	1	3	2
Net periodic benefit expense	$ 1	$ 2	$ 5	$ 5