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Income Taxes - Summary of Tax Provisions (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Income Tax Disclosure [Abstract]        
Pre-tax income at estimated annual effective income tax rate before discrete items $ 92 $ 66 $ 119 $ 170
Impact of change in estimated annual effective tax rate on previous quarter’s pre-tax income 5 (2) 0 0
Interim period treatment of operational losses in foreign jurisdictions for which no tax benefit is recognized 7 (2) 16 (1)
Other discrete items 10 26 (25) 49
Provision for income taxes $ 114 $ 88 $ 110 $ 218