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INCOME TAXES - NARRATIVE (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Tax Contingency [Line Items] |  |  |  |
Worldwide effective tax rate | 373.00% | 26.00% | 1.00% |
Total deferred tax assets, after valuation allowances | $ 3,703,000,000 | $ 1,343,000,000 |  |
Total deferred tax liabilities | 13,364,000,000 | 2,250,000,000 |  |
Deferred foreign tax liability due to reversal of indefinite re-investment assertion | 889,000,000 |  |  |
Additional deferred tax liability amount required | 206,000,000 |  |  |
Unrecognized tax benefits | 2,173,000,000 | 0 | $ 22,000,000 | $ 22,000,000
Potential benefit | 2,000,000,000.0 |  |  |
Potential benefit, if recognized, would affect the effective tax rate on income | 1,700,000,000 |  |  |
Benefits related to tax positions which ultimate deductibility is highly certain | 131,000,000 |  |  |
Interest accrued related to liabilities for unrecognized tax benefits | 199,000,000 |  |  |
Interest related to liabilities for unrecognized tax benefits | 30,000,000 |  |  |
Interest and penalties associated with liabilities for unrecognized tax benefits |  | 0 | $ 0 |
Low end of range |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Possible decrease to unrecognized tax benefit due to settlements with taxing authorities | 100,000,000 |  |  |
High end of range |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Possible decrease to unrecognized tax benefit due to settlements with taxing authorities | 110,000,000 |  |  |
Other current assets |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Income tax receivables | 86,000,000 | 68,000,000 |  |
Long-term receivables and other assets, net |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Federal alternative minimum tax non-current receivables | 36,000,000 | $ 68,000,000 |  |
Foreign |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Tax credit carryforwards | 4,400,000,000 |  |  |
Operating loss carryforwards | 209,000,000 |  |  |
State |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Tax credit carryforwards | 39,000,000 |  |  |
Operating loss carryforwards | 292,000,000 |  |  |
Operating loss carryforward, valuation allowance | 240,000,000 |  |  |
Tax credit carryforward, valuation allowance | 32,000,000 |  |  |
General business credits |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Tax credit carryforwards | $ 404,000,000 |  |  |

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