Intangible Assets and Goodwill - Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 139.7	$ 144.1
Accumulated amortization	(68.8)	(62.2)
Intangible assets, net	70.9	81.9
Finite-Lived Intangible Assets, Amortization Expense, Remainder of 2013	3.8
Finite-Lived Intangible Assets, Amortization Expense, 2014	12.7
Finite-Lived Intangible Assets, Amortization Expense, 2015	11.2
Finite-Lived Intangible Assets, Amortization Expense, 2016	9.2
Finite-Lived Intangible Assets, Amortization Expense, 2017	8.2
Finite-Lived Intangible Assets, Amortization Expense, 2018	6.5
Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	33.9	37.7
Accumulated amortization	(7.9)	(6.0)
Intangible assets, net	26.0	31.7
Software
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	58.6	58.4
Accumulated amortization	(53.1)	(52.0)
Intangible assets, net	5.5	6.4
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	20.5	21.2
Accumulated amortization	(1.9)	(1.0)
Intangible assets, net	18.6	20.2
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	26.7	26.8
Accumulated amortization	(5.9)	(3.2)
Intangible assets, net	20.8	23.6
Developed Technology Rights
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	$ 18.8