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INCOME TAXES (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Income Tax Contingency [Line Items] |  |  |  |  |
Effective income tax | 26.50% | 35.20% | 24.70% | 34.20% |
Estimated effect on income taxes payable from foreign earnings repatriated |  |  | $ 14.5 |  |
Tax Cuts and Jobs Act of 2017, provisional income tax benefit |  |  | 8.5 |  | $ 12.1
Tax Cuts and Jobs Act, transition tax, income tax expense |  |  | 3.6 |  |
Unrecognized tax benefits and related interest and penalties, all of which would affect our effective tax rate if recognized | $ 37.7 |  | 37.7 |  |
Decrease in unrecognized tax benefits due to lapse of statute of limitations | $ 1.8 |  | 1.8 |  |
Accounting Standards Update 2016-09 |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Effective income tax rate reconciliation, share-based compensation, excess tax benefit amount |  |  | $ 9.3 | $ 11.9 |

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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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