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Restructuring and Other Termination Costs (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and other termination costs | $ 12 | $ 38 | $ 0
Restructuring and other termination costs, number of positions eliminated, period percent |  | 13.00% |
One-time termination benefits |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and other termination costs | $ 12 | $ 38 |

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- Definition The number of positions eliminated during the period as a percentage of total positions eliminated during the period in connection with the restructuring plan(s). + References No definition available. + Details
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