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Supplemental Guarantor Information - Condensed Consolidated Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Supplemental Guarantor Information [Line Items] |  |  |
Comprehensive income | $ 566.7 | $ 345.9 | $ 358.6
Reportable Legal Entities | Parent Guarantor |  |  |
Supplemental Guarantor Information [Line Items] |  |  |
Comprehensive income | 566.7 | 345.9 | 358.6
Reportable Legal Entities | Subsidiary Issuer |  |  |
Supplemental Guarantor Information [Line Items] |  |  |
Comprehensive income | 567.6 | 345.9 | 358.6
Reportable Legal Entities | Guarantor Subsidiaries |  |  |
Supplemental Guarantor Information [Line Items] |  |  |
Comprehensive income | 670.5 | 578.1 | 525.2
Reportable Legal Entities | Non-Guarantor Subsidiaries |  |  |
Supplemental Guarantor Information [Line Items] |  |  |
Comprehensive income | 80.0 | (49.6) | 34.1
Reportable Legal Entities | Co-Issuer |  |  |
Supplemental Guarantor Information [Line Items] |  |  |
Comprehensive income | 0.0 | 0.0 | 0.0
Consolidating Adjustments |  |  |
Supplemental Guarantor Information [Line Items] |  |  |
Comprehensive income | $ (1,318.1) | $ (874.4) | $ (917.9)

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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e557-108580 + Details
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