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INCOME TAXES - Uncertain Tax Positions and Interest and Penalties - Additional Disclosures (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Income Taxes |  |  |
Unrecognized tax benefits that would impact effective tax rate if recognized | $ 43 | $ 30 |
Liability for uncertain tax positions | 62 | 55 | $ 53
Reasonably possible reduction in the liability for uncertain tax positions | 8 |  |
Other non-current liabilities |  |  |
Income Taxes |  |  |
Liability for uncertain tax positions | 59 | 54 |
Other non-current assets |  |  |
Income Taxes |  |  |
Liability for uncertain tax positions | $ 3 | $ 1 |

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- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns, and the amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References No definition available. + Details
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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319 + Details
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 + Details
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