Annual report pursuant to Section 13 and 15(d)

Postretirement Health Care and Life Insurance Benefits (Net Periodic Benefit Cost) (Details)

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Postretirement Health Care and Life Insurance Benefits (Net Periodic Benefit Cost) (Details) (Postretirement Obligations, USD $)
In Millions, unless otherwise specified
12 Months Ended
Feb. 02, 2013
Jan. 28, 2012
Jan. 29, 2011
Amortization of net actuarial (gain) loss $ (3)    
Total recognized in net periodic benefit cost and other comprehensive income 8 11 23
Net Periodic Postretirement Benefit Cost [Member]
     
Service cost 0 0 0
Interest cost 12 14 15
Amortization of net actuarial (gain) loss (4) (5) (5)
Amortization of prior service credit 0 0 0
Total net periodic benefit cost 8 9 10
Other Comprehensive Income [Member]
     
Amortization of net actuarial (gain) loss 4 5 5
Amortization of prior service credit 0 0 0
Net actuarial (gain) loss (4) (3) 8
Total recognized in other comprehensive income $ 0 $ 2 $ 13