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Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Current: |  |  |
Federal | $ 256 | $ 400 | $ 443
State | 132 | 56 | 88
Foreign | 40 | 37 | 38
Current tax total | 428 | 493 | 569
Deferred: |  |  |
Federal | 59 | (316) | 57
State | (32) | 62 | 17
Foreign | (2) | 3 | (1)
Deferred tax total | 25 | (251) | 73
Income tax expense | $ 453 | $ 242 | $ 642

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