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Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Current: |  |  |
Federal | $ 41 | $ 46 | $ 1
State | 7 | 1 | 0
Total | 48 | 47 | 1
Deferred: |  |  |
Federal | (3) | 12 | 38
State | 4 | 3 | 5
Revaluation due to state legislative changes | 0 | (40) | (1)
Total Deferred | 1 | (25) | 42
Total | $ 49 | $ 22 | $ 43

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