FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Long-term debt, less current portion	$ 6,344.6	$ 5,300.0
Increase (Decrease) in Noncontrolling Interest Put	1.0
Noncontrolling interest puts	16.7	15.2
Fair market value of zero-coupon subordinated notes	18.8	79.3
Fair market value of senior notes	6,078.9	5,254.5
Fair Value Hedges, Net	14.6
Cash Surrender Value, Fair Value Disclosure	64.0	53.6
Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability	64.5	54.2
Contingent Consideration Classified as Equity, Fair Value Disclosure	16.5	16.8
Fair Value, Inputs, Level 1 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Noncontrolling interest puts	0.0	0.0
Fair Value Hedges, Net	0.0
Interest Rate Fair Value Hedge Asset at Fair Value	0.0
Cash Surrender Value, Fair Value Disclosure	0.0	0.0
Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability	0.0
Contingent Consideration Classified as Equity, Fair Value Disclosure	0.0	0.0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Noncontrolling interest puts	16.7	15.2
Fair Value Hedges, Net	4.1
Interest Rate Fair Value Hedge Derivative at Fair Value, Net		14.6
Cash Surrender Value, Fair Value Disclosure	64.0	53.6
Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability		0.0
Contingent Consideration Classified as Equity, Fair Value Disclosure	0.0	0.0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Noncontrolling interest puts	0.0	0.0
Fair Value Hedges, Net	0.0
Interest Rate Fair Value Hedge Derivative at Fair Value, Net	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	16.5	$ 16.8
Contractually Determined Value [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Increase (Decrease) in Noncontrolling Interest Put	0.7
Foreign Currency Translation [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Increase (Decrease) in Noncontrolling Interest Put	$ 0.3