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Income Taxes (Details 4) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |  |  |
Unrecognized Tax Benefits | $ 188 | $ 113 | $ 100
Income Tax Examination, Penalties and Interest Accrued | 26 | $ 12 |
Timing of Anticipated Impact [Domain] |  |  |
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |  |  |
Unrecognized Tax Benefits | $ 26 |  |

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