DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Impact of Adoption of New Accounting Pronouncements (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015		Dec. 31, 2015
New Accounting Pronouncement, Early Adoption [Line Items]
Deferred income taxes - noncurrent	$ 142.1			$ 71.3	[1]
Other long-term liabilities	84.5			70.8	[1]
Increase in prepaid expense and other current assets	(20.0)	$ (20.5)	[2]
Decrease in accrued expenses and other current liabilities	(39.5)	(16.5)	[2]
Increase in other, net	(4.0)	(11.5)	[2]
Long-Term Debt	2,666.1			1,783.7	[1]
Other Assets	$ 112.0			84.1	[1]
Accounting Standards Update 2015-17 [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Deferred income taxes - current				0.0
Deferred income taxes - noncurrent				71.3
Other long-term liabilities				70.8
Increase in prepaid expense and other current assets		(20.5)
Decrease in accrued expenses and other current liabilities		(16.5)
Increase in other, net		(11.5)
Accounting Standards Update 2015-03 [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Long-Term Debt				1,783.7
Other Assets				84.1
Previously reported [Member] | Accounting Standards Update 2015-17 [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Deferred income taxes - current				58.0
Deferred income taxes - noncurrent				40.3
Other long-term liabilities				97.8
Increase in prepaid expense and other current assets		(20.3)
Decrease in accrued expenses and other current liabilities		(16.4)
Increase in other, net		(11.8)
Previously reported [Member] | Accounting Standards Update 2015-03 [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Long-Term Debt				1,803.7
Other Assets				104.1
Restatement Adjustment [Member] | Accounting Standards Update 2015-17 [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Deferred income taxes - current				(58.0)
Deferred income taxes - noncurrent				31.0
Other long-term liabilities				(27.0)
Increase in prepaid expense and other current assets		(0.2)
Decrease in accrued expenses and other current liabilities		(0.1)
Increase in other, net		$ 0.3
Restatement Adjustment [Member] | Accounting Standards Update 2015-03 [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Long-Term Debt				(20.0)
Other Assets				$ (20.0)

[1] Adjusted as a result of the adoption of certain accounting pronouncements beginning on January 1, 2016. See Note 1, "Description of Business and Summary of Significant Accounting Policies - Recently Adopted Accounting Pronouncements" for details of these adjustments.

[2] Adjusted as a result of the adoption of certain accounting pronouncements beginning on January 1, 2016. See Note 1, "Description of Business and Summary of Significant Accounting Policies - Recently Adopted Accounting Pronouncements" for details of these adjustments.