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Supplemental Guarantor Information - Condensed Consolidating Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Supplemental Guarantor Information [Line Items] |  |  |  |
Comprehensive income (loss) | $ 146.4 | $ 158.7 | $ 290.8 | $ 222.9
Consolidating Adjustments |  |  |  |
Supplemental Guarantor Information [Line Items] |  |  |  |
Comprehensive income (loss) | (342.3) | (357.0) | (678.9) | (556.6)
Parent Guarantor | Reportable Legal Entities |  |  |  |
Supplemental Guarantor Information [Line Items] |  |  |  |
Comprehensive income (loss) | 146.4 | 158.7 | 290.8 | 222.9
Subsidiary Issuer | Reportable Legal Entities |  |  |  |
Supplemental Guarantor Information [Line Items] |  |  |  |
Comprehensive income (loss) | 146.5 | 158.7 | 291.0 | 222.9
Guarantor Subsidiaries | Reportable Legal Entities |  |  |  |
Supplemental Guarantor Information [Line Items] |  |  |  |
Comprehensive income (loss) | 207.9 | 171.4 | 372.8 | 291.4
Non-Guarantor Subsidiaries | Reportable Legal Entities |  |  |  |
Supplemental Guarantor Information [Line Items] |  |  |  |
Comprehensive income (loss) | (12.1) | 26.9 | 15.1 | 42.3
Co-Issuer | Reportable Legal Entities |  |  |  |
Supplemental Guarantor Information [Line Items] |  |  |  |
Comprehensive income (loss) | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0

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