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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 tax: |  |  |
U.S. federal | $ (2) | $ 0 | $ (1)
State and foreign | 183 | 154 | 171
Current tax, total | 181 | 154 | 170
Deferred tax: |  |  |
U.S. federal | 31 | 217 | 19
State and foreign | 4 | 30 | (3)
Deferred tax, total | 35 | 247 | 16
Total | $ 216 | $ 401 | $ 186

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