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Goodwill and Other Intangible Assets - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization of intangible assets $ 62 $ 59 $ 35
Annual estimated amortization expense, year 1 75    
Annual estimated amortization expense, year 2 75    
Annual estimated amortization expense, year 3 75    
Annual estimated amortization expense, year 4 75    
Annual estimated amortization expense, year 5 $ 75