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Income Taxes (Details 1) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Currently payable      
Federal income taxes $ 803 $ 912 $ 592
Foreign income taxes 28 15 18
Total federal and foreign income taxes currently payable 831 927 610
Deferred federal and foreign income taxes 80 60 387
Total federal and foreign income taxes $ 911 $ 987 $ 997