v2.4.0.6
Pension, Postretirement Health Care and Other Benefits (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 28, 2012
Jul. 30, 2011
Jul. 28, 2012
Jul. 30, 2011
Pension Benefits
       
Net Pension and Postretirement Health Care Benefits Expense        
Service cost benefits earned during the period $ 30 $ 29 $ 60 $ 58
Interest cost on projected benefit obligation 35 35 70 69
Expected return on assets (55) (51) (110) (102)
Amortization of losses 26 18 52 34
Amortization of prior service cost   (1)   (2)
Total Net Pension and Postretirement Health Care Benefits Expense 36 30 72 57
Postretirement Health Care Benefits
       
Net Pension and Postretirement Health Care Benefits Expense        
Service cost benefits earned during the period 2 2 4 4
Interest cost on projected benefit obligation   1 1 2
Amortization of losses 1 1 2 2
Amortization of prior service cost (2) (2) (4) (4)
Total Net Pension and Postretirement Health Care Benefits Expense $ 1 $ 2 $ 3 $ 4