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Note 10. Income Taxes Income Tax Provision (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Current: |  |  |  |
Federal |  | $ (7) | $ 10 | $ 8
State |  | 4 | 8 | 3
Foreign |  | 1 | 2 | 3
Current Income Tax Expense (Benefit) |  | (2) | 20 | 14
Deferred: |  |  |  |
Federal |  | (72) | 107 | 91
State |  | 9 | 16 | 4
Foreign |  | 0 | 1 | 1
Deferred Income Tax Expense (Benefit) |  | $ (63) | $ 124 | $ 96
Federal statutory rate |  | 35.00% | 35.00% | 35.00%
Income tax (benefit) expense |  | $ (65) | $ 144 | $ 110
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount |  | (184) |  |
Unrecognized Tax Benefits, Period Increase (Decrease) |  | $ (32) |  |
Subsequent Event |  |  |  |
Deferred: |  |  |  |
Federal statutory rate | 21.00% |  |  |

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