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Variable Interest Entities - Carrying Amounts and Classification of Consolidated VIEs (Details) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Variable Interest Entity [Line Items] |  |  |  |  |
Cash and cash equivalents |  | $ 40.5 | $ 61.6 | $ 66.7 | $ 64.5
Restricted cash |  | 60.9 | 45.9 |  |
Accounts receivable, net of allowance for doubtful accounts |  | 432.0 | 403.3 |  |
Total current assets |  | 654.5 | 598.7 |  |
Property and equipment, net |  | 1,391.8 | 1,310.1 |  |
Goodwill |  | 1,927.2 | 1,890.1 | $ 1,084.0 | $ 456.9
Intangible assets, net |  | 411.3 | 419.4 |  |
Other long-term assets |  | 221.3 | 197.0 |  |
Total assets | [1] | 4,681.9 | 4,606.1 |  |
Current portion of long-term debt |  | 37.1 | 36.8 |  |
Accounts payable |  | 68.3 | 61.6 |  |
Accrued interest payable |  | 25.8 | 29.7 |  |
Other current liabilities |  | 197.1 | 172.1 |  |
Total current liabilities |  | 475.6 | 426.4 |  |
Long-term debt, net of current portion |  | 2,979.3 | 3,134.7 |  |
Total liabilities |  | 3,614.9 | $ 3,705.7 |  |
Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure [Member] |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Cash and cash equivalents |  | 1.6 |  |  |
Restricted cash |  | 3.8 |  |  |
Accounts receivable, net of allowance for doubtful accounts |  | 30.8 |  |  |
Other current assets |  | 2.0 |  |  |
Total current assets |  | 38.2 |  |  |
Property and equipment, net |  | 140.0 |  |  |
Goodwill |  | 73.5 |  |  |
Intangible assets, net |  | 9.6 |  |  |
Deferred income tax assets |  | 0.6 |  |  |
Other long-term assets |  | 0.4 |  |  |
Total assets |  | 262.3 |  |  |
Current portion of long-term debt |  | 1.5 |  |  |
Accounts payable |  | 6.8 |  |  |
Accrued payroll |  | 6.6 |  |  |
Accrued interest payable |  | 0.2 |  |  |
Other current liabilities |  | 5.4 |  |  |
Total current liabilities |  | 20.5 |  |  |
Long-term debt, net of current portion |  | 29.8 |  |  |
Total liabilities |  | $ 50.3 |  |  |
[1] | Our consolidated assets as of December 31, 2016 include total assets of variable interest entities of $262.3 million, which cannot be used by us to settle the obligations of other entities. Our consolidated liabilities as of December 31, 2016 include total liabilities of the variable interest entities of $50.3 million. See Note 3, Variable Interest Entities.

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