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Income Taxes - Schedule of Income before Income Tax, Related to Domestic and Foreign (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]      
U.S. $ 319 $ 278 $ (70)
Foreign 247 (17) 177
Income before income tax provision (benefit) $ 566 $ 261 $ 107