Retirement Plans (Net Periodic Benefit Cost Of Supplemental Retirement Plan) (Details) - Supplemental Employee Retirement Plan - USD ($) $ in Millions	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Service cost	$ 0	$ 0	$ 6
Interest cost	31	33	32
Amortization of net actuarial (gain) loss	10	5	19
Amortization of prior service credit	0	0	0
Total net periodic benefit cost	41	38	57
Net actuarial (gain) loss recognized in OCI before tax	(70)	170	(17)
Prior service cost recognized in OCI before tax	0	0	8
Amortization of net actuarial loss	(10)	(5)	(19)
Amortization of prior service credit	0	0	0
Total recognized in other comprehensive income	(80)	165	(28)
Total recognized in net periodic benefit cost and other comprehensive income	$ (39)	$ 203	$ 29