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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Income Tax Disclosure [Abstract] |  |  |  |
Income tax provision before income from investment in unconsolidated affiliate | 20.90% | 23.00% | 16.60% | 24.20%
Schedule of Equity Method Investments [Line Items] |  |  |  |
Pre-tax gain on sale | $ 0 | $ (3) | $ 10 | $ 229
Financial | Lending Solutions Business |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Gain on sale of businesses, tax |  |  | 2 | 77
Pre-tax gain on sale |  |  | $ 10 | $ 229
Controlling interest sold |  | 55.00% |  |

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