DEBT - CREDIT FACILITIES (Details) $ in Millions	3 Months Ended		12 Months Ended
	Sep. 30, 2019	Mar. 31, 2017 Quarters	Dec. 31, 2019 USD ($) Rate	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jun. 03, 2019 USD ($)	Sep. 15, 2017 USD ($)	Dec. 19, 2014 USD ($)
Line of Credit Facility [Line Items]
2017 Term loan			$ 0.0	$ 527.1			$ 750.0
Notes Payable, Current			2.2	1.8
Long term debt issuance costs			42.2	40.3
2019 Term Loan			375.0	0.0		$ 850.0
Repayments of Other Long-term Debt			1,002.0	295.0	$ 493.0
Long-term debt, less current portion			5,789.8	$ 5,990.9
Line of Credit Facility, Maximum Borrowing Capacity								$ 1,000.0
Debt covenant, requirement for number of consecutive fiscal quarters | Quarters		4
Credit Facility Option to Increase								350.0
Credit Facility, Maximum Swing Line Borrowings								100.0
Line of Credit Facility, Remaining Borrowing Capacity			$ 923.7
2019 Term Loan [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Effective Percentage			2.59%
Debt Covenant Requirement [Member]
Line of Credit Facility [Line Items]
Debt to EBITDA (leverage) ratio					3.0
Debt Covenant Actual [Member]
Line of Credit Facility [Line Items]
Debt to EBITDA (leverage) ratio					2.5
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate at Period End | Rate			2.74%
Credit Facility, Maximum Letters of Credit								$ 150.0
Prime Rate [Member] | 2019 Term Loan [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate Description	0.0% to 0.175%
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] | 2019 Term Loan [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate Description			0.55% to 1.175%
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%
2017 Term Loan [Member]
Line of Credit Facility [Line Items]
Repayments of Other Long-term Debt			$ 250.0