Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Additional Information (Details)

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Goodwill and Intangible Assets - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]    
Amortization of intangibles $ 135,000,000 $ 162,000,000
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2018 403,000,000  
2019 105,000,000  
2020 53,000,000  
2021 0  
2022 0  
Thereafter $ 0