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INCOME TAXES (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Income Tax Disclosure [Abstract] |  |  |  |  |
Effective income tax (percent) |  | 21.60% | 19.40% | 20.10% | 18.60%
Effective tax increase due to effect of state income taxes (percent) |  | (2.00%) |  |  |
Effective tax reduction due to tax impact of share-based payment awards (percent) |  |  | 4.50% | 1.50% | 4.20%
Effective tax impact of GILTI and FDII |  |  |  | 0.60% |
Effective tax rate reduction related to foreign tax impacts (percent) |  |  |  | 0.50% |
Estimated increase in income taxes payable if all foreign earnings were repatriated | $ 2.0 |  |  |  |
Payroll tax deferral, CARES Act |  |  |  | $ 28.5 |
Payroll tax credit, CARES Act |  |  |  | 0.7 |
Unrecognized tax benefits and related interest and penalties, all of which would affect our effective tax rate if recognized | 43.0 | $ 43.0 |  | 43.0 |
Decrease in unrecognized tax benefits due to lapse of statute of limitations | $ 6.2 | $ 6.2 |  | $ 6.2 |

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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=121826272&loc=d3e32718-109319 + Details
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