Annual report pursuant to Section 13 and 15(d)

Postretirement Health Care and Life Insurance Benefits (Estimated Postretirement Benefit Payments In Future Years) (Details)

v2.4.0.6
Postretirement Health Care and Life Insurance Benefits (Estimated Postretirement Benefit Payments In Future Years) (Details) (USD $)
In Millions, unless otherwise specified
Feb. 02, 2013
Expected Benefit Payments [Member]
 
Expected Benefit  
2013 $ 27
2014 25
2015 22
2016 21
2017 19
2018-2022 86
Expected Federal Subsidy [Member]
 
Expected Federal Subsidy  
2013 1
2014 1
2015 1
2016 1
2017 1
2018-2022 $ 4