FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Increase (Decrease) in Noncontrolling Interest Put	$ 0.4
Long-term debt, less current portion	5,419.0	$ 5,789.8
Noncontrolling interest puts	16.2	15.8
Fair market value of senior notes	6,121.8	6,140.6
Fair Value Hedges, Net		1.5
Foreign Currency Contract, Asset, Fair Value Disclosure	40.4	3.2
Cash Surrender Value, Fair Value Disclosure	90.6	80.2
Contingent Consideration Classified as Equity, Fair Value Disclosure	13.9	9.9
Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability	89.2	76.7
Equity Securities, FV-NI		9.1
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Asset	10.8	3.3
Contingent consideration adjustment	(6.8)	(12.0)
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Noncontrolling interest puts	0.0	0.0
Foreign Currency Contract, Asset, Fair Value Disclosure	0.0	0.0
Interest Rate Fair Value Hedge Asset at Fair Value		0.0
Cash Surrender Value, Fair Value Disclosure	0.0	0.0
Contingent Consideration Classified as Equity, Fair Value Disclosure	0.0	0.0
Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability	0.0
Equity Securities, FV-NI		9.1
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Noncontrolling interest puts	16.2	15.8
Foreign Currency Contract, Asset, Fair Value Disclosure	40.4	3.2
Interest Rate Fair Value Hedge Derivative at Fair Value, Net		1.5
Cash Surrender Value, Fair Value Disclosure	90.6	80.2
Contingent Consideration Classified as Equity, Fair Value Disclosure	0.0	0.0
Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability		0.0
Equity Securities, FV-NI		0.0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Noncontrolling interest puts	0.0	0.0
Foreign Currency Contract, Asset, Fair Value Disclosure	0.0	0.0
Interest Rate Fair Value Hedge Derivative at Fair Value, Net		0.0
Cash Surrender Value, Fair Value Disclosure	0.0	0.0
Contingent Consideration Classified as Equity, Fair Value Disclosure	13.9	9.9	$ 18.6
Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability	$ 0.0	0.0
Equity Securities, FV-NI		$ 0.0