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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Income Tax Disclosure [Abstract]        
Earnings before income taxes $ 267 $ 261 $ 749 $ 710
Income tax expense computed at United States statutory tax rate 93 91 262 249
Valuation allowance release (68) (25) (126) (38)
U.S. foreign income items, net of credits (18) (34) (32) (59)
Foreign government tax incentive (including BEFIEX in 2014) 0 (10) (8) (20)
Other 10 4 20 (6)
Income tax expense computed at effective worldwide tax rates $ 17 $ 26 $ 116 $ 126