FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Noncontrolling interest puts	$ 15.7	$ 15.0
Fair market value of zero-coupon subordinated notes	1.8	16.9
Fair market value of senior notes	5,658.5	5,318.0
Notes Receivable, Fair Value Disclosure	110.0	0.0
Cash Surrender Value, Fair Value Disclosure	75.3	63.5
Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability	74.3	64.2
Contingent Consideration Classified as Equity, Fair Value Disclosure	20.1	18.6
Fair Value Hedges, Net	3.7	3.1
Foreign Currency Contract, Asset, Fair Value Disclosure	1.2	2.8
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	1.5
Equity Securities, FV-NI	29.8
Level 1 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Noncontrolling interest puts	0.0	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 Hedges, Net	0.0	0.0
Foreign Currency Contract, Asset, Fair Value Disclosure	0.0	0.0
Equity Securities, FV-NI	29.8
Fair Value, Inputs, Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Noncontrolling interest puts	15.7	15.0
Cash Surrender Value, Fair Value Disclosure	75.3	63.5
Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability	0.0	0.0
Contingent Consideration Classified as Equity, Fair Value Disclosure	0.0	0.0
Fair Value Hedges, Net	3.7	3.1
Foreign Currency Contract, Asset, Fair Value Disclosure	1.2	2.8
Equity Securities, FV-NI	0.0
Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Noncontrolling interest puts	0.0	0.0
Cash Surrender Value, Fair Value Disclosure	0.0	0.0
Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability	0.0	0.0
Contingent Consideration Classified as Equity, Fair Value Disclosure	20.1	18.6
Fair Value Hedges, Net	0.0	0.0
Foreign Currency Contract, Asset, Fair Value Disclosure	0.0	$ 0.0
Equity Securities, FV-NI	$ 0.0
Notes Receivable [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	7.79%