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Income Taxes (Unaudited) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Income Tax Disclosure [Abstract]    
United States operations $ 136 $ 76
International operations 221 352
Total $ 357 $ 428
Consolidated effective income tax rate (percent) 36.00% 34.00%