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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2020
Effective Income Tax Rate Reconciliation, Percent | 22.00% | 21.00% |
Other Tax Expense (Benefit) | $ 2 | $ 2 |
Forecast [Member] |  |  |
Effective Income Tax Rate Reconciliation, Percent |  |  | 26.00%

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