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Business Disposition and Discontinued Operations - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2019
May 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Income (Loss) from Ongoing Equity Method Investment in Discontinued Operation after Disposal $ 14 $ 45  
Discontinued Operation, Amount of Continuing Cash Flows after Disposal   $ 67  
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Ownership interest retained, percentage     9.70%