Variable Interest Entities Variable Interest Entities - Table 1 (Details) - USD ($) $ in Millions	Jun. 30, 2016		Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Variable Interest Entity [Line Items]
Cash and cash equivalents	$ 70.3		$ 61.6	$ 45.5	$ 66.7
Accounts receivable, net	420.6		410.5
Other current assets	168.6		126.6
Total current assets	659.5		598.7
Property and equipment, net	1,336.9		1,310.1
Goodwill	1,899.7		1,890.1
Intangible assets, net	414.2		419.4
Other long-term assets	206.8		197.0
Total assets	4,632.6	[1]	4,606.1
Current portion of long-term debt	36.5		36.8
Accounts payable	67.1		61.6
Accrued expenses and other current liabilities	355.5		328.0
Total current liabilities	459.1		426.4
Long-term debt, net of current portion	3,050.0		3,134.7
Total Liabilities	3,663.2		$ 3,705.7
Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure [Member]
Variable Interest Entity [Line Items]
Cash and cash equivalents	1.5
Accounts receivable, net	31.4
Other current assets	6.7
Total current assets	39.6
Property and equipment, net	132.6
Goodwill	73.5
Intangible assets, net	8.6
Other long-term assets	1.0
Total assets	255.3
Current portion of long-term debt	1.4
Accounts payable	8.5
Accrued expenses and other current liabilities	14.1
Total current liabilities	24.0
Long-term debt, net of current portion	30.6
Total Liabilities	$ 54.6

[1] (1) Our consolidated assets as of June 30, 2016 include total assets of variable interest entities of $255.3 million, which cannot be used by us to settle the obligations of other entities. Our consolidated liabilities as of June 30, 2016 include total liabilities of the variable interest entities of $54.6 million. See Note 3, Variable Interest Entities.