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Retirement Plans Retirement Plans (Projected Future Pension Benefit Payments, Excluding Any Termination Beneftis) (Details) (U.S. Plans [Member], USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
U.S. Plans [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
Projected future pension benefit payments, 2013 $ 767
Projected future pension benefit payments, 2014 759
Projected future pension benefit payments, 2015 767
Projected future pension benefit payments, 2016 779
Projected future pension benefit payments, 2017 791
Projected future pension benefit payments, 2018 - 2022 $ 4,165