DEBT - CREDIT FACILITIES (Details) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2016 USD ($) $ / shares	Dec. 31, 2015 USD ($) Quarters	Dec. 31, 2017	Feb. 18, 2015	Dec. 19, 2014 USD ($)	Nov. 02, 2014 USD ($)
Line of Credit Facility [Line Items]
Bridge Loan						$ 4,250.0
Long-term debt, less current portion	$ 5,940.3	$ 5,300.0	$ 5,940.3
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						250.0
Credit Facility, Maximum Swing Line Borrowings						100.0
Long-term Debt, Maturities, Repayment Terms		P5Y
Debt Covenant Requirement [Member]
Line of Credit Facility [Line Items]
Debt to EBITDA (leverage) ratio	3.0		3.0
Debt Covenant Actual [Member]
Line of Credit Facility [Line Items]
Debt to EBITDA (leverage) ratio	2.5		2.5
60-Day Debt Bridge Traunche [Domain]
Line of Credit Facility [Line Items]
Bridge Term Credit Facility Agreement, Maximum Borrowing Amount						400.0
Short-term Debt, Terms			P60D
Term Loan [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate at Period End		2.00%
364-Day Debt Bridge Traunche [Member]
Line of Credit Facility [Line Items]
Bridge Term Credit Facility Agreement, Maximum Borrowing Amount						2,850.0	$ 3,850.0
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit Facility, Maximum Letters of Credit						125.0
Line of Credit Facility, Initiation Date	Dec. 19, 2014
Debt to EBITDA (leverage) ratio	3,100,000		3,100,000
Line of Credit Facility, Interest Rate at Period End		1.90%
Maximum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt to EBITDA (leverage) ratio	4.75	4.25	4.75		3.75
Subsequent Event [Member] | Maximum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt to EBITDA (leverage) ratio				3.75
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 0.60%
London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Commitment Fee Description			0.125% to 0.40%
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			1.00% to 1.60%
Excluding Term Loan Commitment [Member]
Line of Credit Facility [Line Items]
Bridge Loan						$ 3,250.0
Zero-coupon convertible subordinated notes [Member]
Line of Credit Facility [Line Items]
Zero Coupon Convertible Subordinated Notes Conversion Trigger Price | $ / shares		$ 76.27