Postretirement Health Care and Life Insurance Benefits (Net Periodic Benefit Cost) (Details) (Postretirement Obligations, USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Amortization of net actuarial (gain) loss	$ (3)
Total recognized in net periodic benefit cost and other comprehensive income	8	11	23
Net Periodic Postretirement Benefit Cost [Member]
Service cost	0	0	0
Interest cost	12	14	15
Amortization of net actuarial (gain) loss	(4)	(5)	(5)
Amortization of prior service credit	0	0	0
Total net periodic benefit cost	8	9	10
Other Comprehensive Income [Member]
Amortization of net actuarial (gain) loss	4	5	5
Amortization of prior service credit	0	0	0
Net actuarial (gain) loss	(4)	(3)	8
Total recognized in other comprehensive income	$ 0	$ 2	$ 13