Retirement Benefits Plans (Estimated Future Benefit Payments) (Details) (USD $)
In Millions, unless otherwise specified
Feb. 02, 2013
Primary Plan Benefits [Member]
 
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]  
2013 $ 358
2014 359
2015 360
2016 362
2017 366
2018-2022 1,794
Supplemental Plan Benefits [Member]
 
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]  
2013 53
2014 49
2015 48
2016 42
2017 18
2018-2022 87
Other Postretirement Benefit Plans, Defined Benefit [Member]
 
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]  
2013 2
2014 2
2015 2
2016 2
2017 2
2018-2022 $ 8