Pension, Postretirement Health Care and Other Benefits (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	May 03, 2014	May 04, 2013
Pension Benefits
Net Pension and Postretirement Health Care Benefits Expense
Service cost	$ 28	$ 30
Interest cost	38	35
Expected return on assets	(58)	(59)
Amortization of losses	16	25
Amortization of prior service cost	(3)	(3)
Total	21	28
Postretirement Health Care Benefits
Net Pension and Postretirement Health Care Benefits Expense
Service cost	1	2
Interest cost	1	0
Expected return on assets	0	0
Amortization of losses	1	1
Amortization of prior service cost	(4)	(4)
Total	$ (1)	$ (1)