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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%

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