DEBT - SCHEDULE OF LONG-TERM DEBT (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jan. 30, 2015	Dec. 19, 2014	Nov. 01, 2013
Debt Instrument [Line Items]
Long-term Debt and Capital Lease Obligations, Current	$ 24.8
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months	10.0
Credit Facility Option to Increase					$ 350.0
Long-term debt, less current portion	6,041.9	$ 6,344.6
2014 Term Loan	0.0	72.0
4.625% Senior notes due 2020	597.0	604.1
Senior notes due 2027	600.0	600.0
4.70 % Senior notes due 2045	900.0	900.0
Senior notes due 2024	600.0	600.0
3.60% Senior notes due 2025	1,000.0	1,000.0
2017 Term loan	527.1	750.0
Long term debt issuance costs	(40.3)	(48.2)
Notes Payable, Noncurrent	7.1	8.9
Senior Notes, Noncurrent	2,900.0					$ 700.0
3.20% Senior notes due 2022	500.0	500.0
4.00% Senior notes due 2023	300.0	300.0
3.75% Senior notes due 2022	500.0	500.0
2.625% Senior Notes due 2020	500.0	500.0
Long-term Debt, Current Maturities	(10.0)
Capital lease obligations, net of interest, current	(7.9)
Long term and capital lease obligations, net of interest, current	(17.9)
Capital Lease Obligations, Current	14.8
Long-term Debt, Maturities, Repayments of Principal in Year Two	1,100.0
Total long-term debt	5,990.9
Capital Lease Obligations, Noncurrent	51.0	$ 57.8
Capital Leases, Future Minimum Payments Due in Two Years	13.8
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	1,113.8
Long-term Debt, Maturities, Repayments of Principal in Year Three	0.0
Capital Leases, Future Minimum Payments Due in Three Years	12.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	12.0
Long-term Debt, Maturities, Repayments of Principal in Year Four	1,527.1
Capital Leases, Future Minimum Payments Due in Four Years	10.8
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	1,537.9
Long-term Debt, Maturities, Repayments of Principal in Year Five	300.0
Capital Leases, Future Minimum Payments Due in Five Years	10.7
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five	310.7
Long-term Debt, Maturities, Repayments of Principal after Year Five	3,063.8
Capital Leases, Future Minimum Payments Due Thereafter	34.5
Long-term Debt	6,000.9
Capital lease obligations, net of interest	58.9
Long term and capital lease obligations, net of interest	6,059.8
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	3,098.3
Capital Lease Obligations	96.6
Long-term Debt and Capital Lease Obligations	6,097.5
Long term debt, future minimum payments, interest included in payments	0.0
Capital Leases, Future Minimum Payments, Interest Included in Payments	(37.7)
Long term and capital lease future minimum payments, interest included in payments	(37.7)
Long term and capital lease obligations, net of interest, noncurrent	$ 6,041.9
Debt Instrument, Basis Spread on Variable Rate	2.298%
Senior notes due 2018 [Member]
Debt Instrument [Line Items]
Senior Notes, Noncurrent						400.0
Senior notes due 2020 [Member]
Debt Instrument [Line Items]
Senior Notes, Noncurrent				$ 500.0
Senior notes due 2022 [Member]
Debt Instrument [Line Items]
Senior Notes, Noncurrent				500.0
Senior notes due 2023 [Member]
Debt Instrument [Line Items]
Senior Notes, Noncurrent						$ 300.0
Senior notes due 2024 [Member] [Member]
Debt Instrument [Line Items]
Long-term debt, less current portion			$ 600.0
Senior notes due 2045 [Member]
Debt Instrument [Line Items]
Senior Notes, Noncurrent				$ 900.0