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INCOME TAXES Income Taxes (Schedule of Valuation Allowance) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Valuation Allowance [Line Items] |  |  |  |
Deferred Tax Assets, Valuation Allowance | $ 836 | $ 441 | $ 1,287 | $ 1,983
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount |  |  | 696 |
Included in income tax expense (benefit) [Member] |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | (3) | (846) | (691) |
Change in deferred assets in other comprehensive income [Member] |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | 0 | 0 | (5) |
Acquisition of noncontrolling interest [Member] |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | $ 398 | $ 0 | $ 0 |

X
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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