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INCOME TAXES (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Tax Credit and Operating Loss Carryforwards [Line Items] |  |  |  |  |
Statutory federal tax rate |  |  | 21.00% | 28.10% | 35.00%
Tax Cuts And Jobs Act Of 2017, provisional income tax benefit | $ (81) | $ (81) |  |  |
Unrecognized tax benefits, income tax penalties and interest accrued |  |  | $ 4 | $ 5 |
Unrecognized tax expense (benefit), income tax penalties and interest expense |  |  | (1) | 1 | $ (1)
Unrecognized tax benefits that would impact effective tax rate |  |  | 23 | 33 | 28
Gross unrecognized tax benefits recognized upon the expiration of the applicable statute of limitations |  |  | 3 | $ 2 | $ 1
Domestic Tax Authority [Member] | Foreign Tax Credit Carryforward [Member] |  |  |  |  |
Tax Credit and Operating Loss Carryforwards [Line Items] |  |  |  |  |
Tax credit carryforward, amount |  |  | 35 |  |
Foreign Tax Authority [Member] | Not Subject to Expiration [Member] |  |  |  |  |
Tax Credit and Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards |  |  | 9 |  |
Foreign Tax Authority [Member] | Not Subject to Expiration [Member] | Foreign Tax Credit Carryforward [Member] |  |  |  |  |
Tax Credit and Operating Loss Carryforwards [Line Items] |  |  |  |  |
Tax credit carryforward, amount |  |  | 24 |  |
Foreign Tax Authority [Member] | Subject to Expiration [Member] |  |  |  |  |
Tax Credit and Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards |  |  | $ 19 |  |

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- Definition Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit) + References No definition available. + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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