Retirement Plans (Net Periodic Benefit Cost Of Supplemental Retirement Plan) (Details) (Supplemental Employee Retirement Plan, USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013
Supplemental Employee Retirement Plan
Service cost	$ 0	$ 6	$ 6
Interest cost	33	32	35
Amortization of net actuarial (gain) loss	5	19	17
Amortization of prior service credit	0	0	(1)
Total net periodic benefit cost	38	57	57
Net actuarial (gain) loss recognized in OCI before tax	170	(17)	34
Prior service cost recognized in OCI before tax	0	8	0
Amortization of net actuarial loss	(5)	(19)	(17)
Amortization of prior service credit	0	0	1
Total recognized in other comprehensive income	165	(28)	18
Total recognized in net periodic benefit cost and other comprehensive income	$ 203	$ 29	$ 75