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Provision for (Benefit from) Income Taxes (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Current |  |  |  |
Federal |  | $ (7) | $ 0 | $ (1)
State |  | 36 | 5 | 3
Foreign |  | 59 | 37 | 63
Current income tax provision (benefit) |  | 88 | 42 | 65
Deferred |  |  |  |
Federal |  | 63 | (205) | 51
State |  | (39) | (5) | 5
Foreign |  | (10) | 18 | (5)
Deferred income tax provision |  | (14) | 192 | (51)
Provision for (benefit from) income taxes |  | 102 | (150) | $ 116
Provision adjustment due to corporate tax rate change [Member] |  |  |  |
Deferred |  |  |  |
Deferred income tax provision |  | $ (30) | 317 |
Provision adjustment due to anticipated repatriation of foreign earnings [Member] |  |  |  |
Deferred |  |  |  |
Deferred income tax provision | $ (30) |  | $ (104) |

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