Annual report pursuant to Section 13 and 15(d)

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

v3.3.1.900
Postretirement Health Care and Life Insurance Benefits (Estimated Postretirement Benefit Payments In Future Years) (Details) - Other Postretirement Benefit Plan [Member]
$ in Millions
Jan. 30, 2016
USD ($)
Expected Benefit  
2015 $ 19
2016 18
2017 18
2018 17
2019 17
2020-2024 73
Expected Federal Subsidy  
2015 1
2016 1
2017 1
2018 1
2019 1
2020-2024 $ 2