Postretirement Benefits (Benefit Obligations And Funded Status) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 02, 2013	Jan. 28, 2012
Defined Benefit Plan Disclosure [Line Items]
Underfunded status at end of year	$ (167)	$ (152)
Change in benefit obligation [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at beginning of year	152	122
Participant service cost	4	3
Interest cost	7	7
Benefits paid	(5)	(5)
Actuarial loss	9	25
Benefit obligation at end of year	167	152
Change in plan assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of year	0	0
Employer contribution	5	5
Benefits paid	(5)	(5)
Fair value of plan assets at end of year	$ 0	$ 0