DEBT (Detail Textuals) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Oct. 31, 2016	Jun. 30, 2016	Nov. 05, 2015	Nov. 03, 2015	Oct. 05, 2015	Jun. 23, 2015	Mar. 26, 2015	Aug. 31, 2014	Jun. 24, 2014	Jun. 23, 2014	Jun. 30, 2012	Dec. 22, 1997
Debt Instrument [Line Items]
Secured Borrowing Maximum Capacity	$ 250.0
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	282.3
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Amount Borrowed	230.0
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Amount Paid	20.0
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount	210.0	$ 0.0
Delayed-Draw Term Loan Facility of Spinco									$ 1,050.0
Delayed-Draw Term Loan Facility of Spinco, Amount Drawn								$ 875.0
Senior Credit Facility									1,850.0			$ 415.0
Maximum amount of senior revolving credit facility									500.0			265.0	$ 265.0
Delayed-Draw Term Loan Facility, Maximum Borrowing Capacity									1,350.0
Delayed-Draw Term Loan Facility, Amount Drawn								475.0
Subfacility of Senior Credit Facility									$ 100.0
Available credit under senior revolving credit facility	483.4
Amount of letters of credit issued under subfacility	16.6
Annual Required Principal Payment (Percent) in Years 1 and 2									5.00%
Annual Required Principal Payment (Percent) in Year 3									7.50%
Annual Required Principal Payment (Percent) in Years 4 and 5									10.00%
Sumitomo Credit Facility								600.0
Sumitomo Credit Facility Amendment							$ 200.0
Sumitomo Credit Facility Amendment Borrowing						$ 200.0
Long-term debt assumed								569.0
Combined Senior Credit Facility		1,850.0
Business Acquisition Debt Issuance Costs	1.0	13.3
Bridge Financing Commitments										$ 3,354.5
Bridge Financing Amortized Debt Issuance Costs		30.0
Notes payable	3,674.5	3,879.9
Call premium and write-off of unamortized deferred debt issuance costs and unamortized discount			$ 9.5
Call premium			6.7
Write-off of unamortized deferred debt issuance costs		0.5	2.1
Write-off of unamortized discount			0.7
Delayed-Draw Term Loan Facility												$ 150.0
Capital Leased Assets, Gross		1.4
Total letters of credit outstanding	73.3
Expected maturities of long-term debt [Abstract]
2017	80.3
2018	691.9
2019	345.7
2020	980.3
2021	0.2
Thereafter	1,576.1
Derivative Liability, Fair Value, Gross Liability	29.8	13.2
Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge	0.1													$ (2.2)
Reduction in interest expense due to interest rate swaps	3.7	2.8	2.9
Sumitomo Credit Facility
Debt Instrument [Line Items]
Repayments of Debt	210.0
Notes payable	$ 590.0	$ 800.0
Interest rate	2.27%	1.77%
2023 Notes
Debt Instrument [Line Items]
2023 Senior Notes								$ 720.0
Notes payable	$ 720.0	$ 720.0
Interest rate	9.75%	9.75%						9.75%
2025 Notes
Debt Instrument [Line Items]
2025 Senior Notes								$ 500.0
Notes payable	$ 500.0	$ 500.0
Interest rate	10.00%	10.00%						10.00%
Senior Term Loan Facility
Debt Instrument [Line Items]
Repayments of Debt	$ 67.5
Notes payable	$ 1,282.5	$ 1,350.0
Interest rate	2.77%	2.17%
Notes payable due 2016
Debt Instrument [Line Items]
Repayments of Debt	$ 125.0
Notes payable	$ 0.0	$ 125.0
Interest rate	6.75%	6.75%
Notes payable due 2019
Debt Instrument [Line Items]
Notes payable											$ 150.0
Senior Term Loan Facility due 2019
Debt Instrument [Line Items]
Repayments of Senior Debt		$ 2.8	0.9
Refinancing of Senior Debt		146.3
SunBelt Notes
Debt Instrument [Line Items]
Repayments of Debt	$ 12.2	12.2	$ 12.2
Notes payable	$ 12.2	$ 24.4
Interest rate	7.23%	7.23%
Interest Rate Swaps Designated As Fair Value Hedges
Expected maturities of long-term debt [Abstract]
Swap Amount	$ 500.0	$ 0.0		$ 250.0	$ 250.0
Derivative Liability, Fair Value, Gross Liability	28.5
Derivative, Gain (Loss) on Derivative, Net	2.6
SunBelt Notes
Expected maturities of long-term debt [Abstract]
Swap Amount														73.1
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge														$ 2.2
Guaranteed Senior Secured Notes due 2017, Series O
Debt Instrument [Line Items]
Face amount of senior secured notes															$ 97.5
Required annual debt repayment for Series O and Series G notes		6.1
Guaranteed Senior Secured Notes due 2017, Series G
Debt Instrument [Line Items]
Face amount of senior secured notes															$ 97.5
Required annual debt repayment for Series O and Series G notes		6.1
SunBelt
Debt Instrument [Line Items]
Interest rate															7.23%
Required annual debt repayment for Series O and Series G notes		$ 12.2
Interest Rate Contract Gains
Expected maturities of long-term debt [Abstract]
Derivative Asset, Fair Value, Gross Asset	$ 9.6