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INCOME TAXES (Provision for (benefit from) income taxes) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Current Income Tax Expense (Benefit), Continuing Operations [Abstract] |  |  |  |
Federal |  | $ 3 | $ (164) | $ (89)
State |  | 10 | (17) | (2)
Foreign |  | 1,426 | 352 | 160
Total current |  | 1,439 | 171 | 69
Deferred income taxes: |  |  |  |
Federal |  | (64) | (137) | (3,403)
State |  | (10) | (41) | (154)
Foreign |  | (89) | 451 | 163
Total deferred |  | (163) | 273 | (3,394)
Adjustments |  | (393) | (13) | 1,374
Operating loss carryforwards |  | 0 | (60) | 0
(Provision for) benefit from income taxes |  | 883 | 371 | $ (1,951)
Reversal of valuation allowances due to 2017 Tax Cuts and Jobs Act | $ (975) | 272 |  |
Decrease in corporate income tax due to Tax Cuts and Jobs Act | $ 121 | 121 |  |
Net provision associated with an increase in the beginning of the year valuation allowance |  | $ (1,500) | 1,200 |
PT-FI |  |  |  |
Deferred income taxes: |  |  |  |
Adjustments |  |  | $ 200 |

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