Supplemental Guarantor Information -Condensed Consolidating Statements of Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Supplemental Guarantor Information [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 47.0	$ 25.9
Parent Guarantor [Member]
Supplemental Guarantor Information [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	47.0	25.9
Subsidiary Issuer [Member]
Supplemental Guarantor Information [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	47.0	25.9
Guarantor Subsidiaries [Member]
Supplemental Guarantor Information [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	98.0	88.7
Non-Guarantor Subsidiaries [Member]
Supplemental Guarantor Information [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(0.7)	0.4
Co-Issuer [Member]
Supplemental Guarantor Information [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	0	0
Consolidating Adjustments [Member]
Supplemental Guarantor Information [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(144.3)	(115.0)
Consolidated [Member]
Supplemental Guarantor Information [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 47.0	$ 25.9