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Supplemental Guarantor Information - Condensed Consolidated Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	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)

X

- 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

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+ References

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