Retirement Plans (Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 01, 2014	Feb. 02, 2013	Jan. 28, 2012
Supplementary Retirement Plan [Member]
Total recognized in net periodic benefit cost and other comprehensive income	$ 29	$ 75	$ 132
Supplementary Retirement Plan [Member] | Other Comprehensive Income [Member]
Amortization of net actuarial (gain) loss	(19)	(17)	(8)
Net actuarial (gain) loss	(17)	34	90
Amortization of prior service credit	0	1	1
Total recognized in other comprehensive income	(28)	18	83
Supplementary Retirement Plan [Member] | Net Periodic Pension Cost [Member]
Service cost	6	6	6
Interest cost	32	35	36
Amortization of net actuarial (gain) loss	19	17	8
Amortization of prior service credit	0	(1)	(1)
Total net periodic benefit cost	57	57	49
Pension Plan [Member]
Total recognized in net periodic benefit cost and other comprehensive income	(241)	(70)	544
Pension Plan [Member] | Other Comprehensive Income [Member]
Amortization of net actuarial (gain) loss	(141)	(141)	(88)
Net actuarial (gain) loss	(254)	(91)	530
Amortization of prior service credit	0	1	1
Total recognized in other comprehensive income	(395)	(231)	443
Pension Plan [Member] | Net Periodic Pension Cost [Member]
Service cost	112	117	102
Interest cost	143	157	160
Expected return on assets	(242)	(253)	(248)
Amortization of net actuarial (gain) loss	141	141	88
Amortization of prior service credit	0	(1)	(1)
Total net periodic benefit cost	$ 154	$ 161	$ 101