DEBT (Credit Facilities) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($) Rate	Dec. 31, 2017 USD ($)	Dec. 19, 2014 USD ($)	Jun. 30, 2011 USD ($)
Line of Credit Facility [Line Items]
Previously Recorded Litigation Reserve In Connection With False Claims Act Lawsuit				$ 15.0
Long-term Debt, Excluding Current Maturities	$ 6,359.3	$ 6,344.6
Convertible Subordinated Debt, Current	8.9	8.8
Long-term Line of Credit	15.0	0.0
Line of Credit Facility, Fair Value of Amount Outstanding	72.0	72.0
Revolving Credit Facility, maximum borrowing capacity			$ 1,000.0
Capital Lease Obligations, Current	8.2	8.3
Notes Payable	1.8	1.8
Debt, Current	417.7	417.5
Other Long-term Debt	72.0	57.8
Credit Facility Option to Increase			350.0
Credit Facility, Maximum Swing Line Borrowings			100.0
Notes Payable	$ 8.5	8.9
Long-term Debt [Member]
Line of Credit Facility [Line Items]
Revolving Credit Facility, interest rate at period end	3.13%
2017 Term Loan [Member]
Line of Credit Facility [Line Items]
Revolving Credit Facility, interest rate at period end	2.95%
Senior notes due 2027 [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Excluding Current Maturities	$ 600.0	600.0
Revolving Credit Facility, interest rate at period end | Rate	3.60%
Senior notes due 2024 [Member] [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Excluding Current Maturities	$ 600.0	600.0
Revolving Credit Facility, interest rate at period end | Rate	3.25%
Senior notes due 2020 [Member]
Line of Credit Facility [Line Items]
Senior Notes, Noncurrent	$ 500.0	500.0
Long-term Debt, Excluding Current Maturities	$ 604.5	604.1
Debt Instrument, Interest Rate, Stated Percentage	4.625%
Senior notes due 2045 [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Excluding Current Maturities	$ 900.0	900.0
Senior notes due 2022 [Member]
Line of Credit Facility [Line Items]
Senior Notes, Noncurrent	500.0	500.0
Long-term Debt, Excluding Current Maturities	500.0	500.0
2017 Term Loan [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	$ 750.0	$ 750.0
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit Facility, Maximum Letters of Credit			$ 150.0
Debt to EBITDA (leverage) ratio	0
Line of Credit Facility, Interest Rate at Period End	2.69%
Prime Rate [Member] | Term Loan [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate Description	0.125% to 1.00%
Prime Rate [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate Description	0.00% to 0.25%
Prime Rate [Member] | 2017 Term Loan [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate Description	0.0% to 0.50%
London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Commitment Fee Description	0.10% to 0.25%
London Interbank Offered Rate (LIBOR) [Member] | Term Loan [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate Description	1.125% to 2.00%
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate Description	0.775% to 1.25%
London Interbank Offered Rate (LIBOR) [Member] | 2017 Term Loan [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate Description	0.875% to 1.50%