Benefit Plans (Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Nov. 02, 2013	Oct. 27, 2012	Nov. 02, 2013	Oct. 27, 2012
Pension Plan [Member]
Service cost	$ 28	$ 30	$ 84	$ 88
Interest cost	36	40	107	118
Expected return on assets	(60)	(64)	(181)	(190)
Recognition of net actuarial (gain) loss	34	35	105	106
Amortization of prior service credit	0	(1)	0	(1)
Defined Benefit Plan, Net Periodic Benefit Cost	38	40	115	121
Supplemental Employee Retirement Plans, Defined Benefit [Member]
Service cost	2	1	5	4
Interest cost	8	9	24	26
Recognition of net actuarial (gain) loss	4	4	14	13
Amortization of prior service credit	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	14	14	43	43
Other Postretirement Benefit Plans, Defined Benefit [Member]
Service cost	0	0	0	0
Interest cost	2	3	7	9
Recognition of net actuarial (gain) loss	0	(1)	(2)	(3)
Amortization of prior service credit	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	$ 2	$ 2	$ 5	$ 6