INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Effective income tax rate	10.70%	8.90%	8.30%	9.90%
Tax expense (benefit) from employee share-based compensation	$ (16.4)	$ (19.6)	$ (47.0)	$ (56.2)
Liability for income taxes associated with uncertain tax positions	250.5		250.5		$ 203.1
Decrease in unrecognized tax benefits is reasonably possible	76.6		76.6		50.1
Net amounts that would favorably affect effective tax rate	$ 173.9		$ 173.9		$ 153.0

Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for award under share-based payment arrangement. Includes, but is not limited to, expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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Amount of unrecognized tax benefits.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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