Pension and Other Post-Retirement Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	May 02, 2015	May 03, 2014
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 4	$ 3
Interest cost	7	10
Expected return on plan assets	(15)	(17)
Amortization of unrecognized losses and prior service costs	4	4
Total cost	0	0
Other Postretirement Benefit Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0	0
Interest cost	1	1
Expected return on plan assets	0	0
Amortization of unrecognized losses and prior service costs	0	1
Total cost	$ 1	$ 2