Product Warranties (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of the change in estimated product warranty liabilities [Roll Forward]
Balance, beginning of year	$ 32.6	$ 30.1
Provision for warranties issued during the year	9.9	8.6
Settlements made during the year	(8.1)	(6.8)
Increases in warranty estimates	0	0.7
Balance, end of year	34.4	32.6
Product Warranty Accrual, Balance Sheet Classification [Abstract]
Current portion	6.7	6.5
Non-current portion	27.7	26.1
Total	$ 34.4	$ 32.6