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Variable Interest Entities (Details) - Variable Interest Entity, Primary Beneficiary - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015
Variable Interest Entity [Line Items] |  |  |  |  |
Assets | $ 91.9 |  | $ 91.9 |  | $ 80.6
Liabilities | 77.2 |  | 77.2 |  | 67.1
Revenues | 82.4 | $ 30.3 | 156.5 | $ 30.3 |
Operating expenses |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Expenses | 79.1 | $ 29.5 | 151.1 | $ 29.5 |
Cash and Cash Equivalents |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Assets | 16.2 |  | 16.2 |  | 14.3
Accounts receivable, net of allowance |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Assets | 63.8 |  | 63.8 |  | 54.7
Other current assets |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Assets | 5.3 |  | 5.3 |  | 3.8
Property and equipment, net of accumulated depreciation |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Assets | 3.9 |  | 3.9 |  | 4.8
Other long-term assets |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Assets | 2.7 |  | 2.7 |  | 3.0
Accounts payable |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Liabilities | 46.2 |  | 46.2 |  | 44.9
Accrued expenses, other |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Liabilities | 12.4 |  | 12.4 |  | 8.1
Other current liabilities |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Liabilities | 9.5 |  | 9.5 |  | 8.9
Other long-term liabilities |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Liabilities | $ 9.1 |  | $ 9.1 |  | $ 5.2

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- Definition The amount of expense between the reporting entity and the Variable Interest Entity (VIE). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph d -URI http://asc.fasb.org/extlink&oid=52262685&loc=d3e5747-111685 + Details
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- Definition The amount of income between the reporting entity and the Variable Interest Entity (VIE). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph d -URI http://asc.fasb.org/extlink&oid=52262685&loc=d3e5747-111685 + Details
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- Definition The carrying amount of the consolidated Variable Interest Entity's assets included in the reporting entity's statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=52262685&loc=d3e5710-111685 + Details
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- Definition The carrying amount of the consolidated Variable Interest Entity's liabilities included in the reporting entity's statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=52262685&loc=d3e5710-111685 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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