Product Warranty (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012 years	Sep. 30, 2011	Dec. 31, 2011
Product warranty rollforward
Beginning balance	$ 72.7	$ 66.8
Acquisition	0	4.5
Provisions	23.1	38.6
Payments	(31.9)	(33.2)
Translation adjustment	0.2	(1.2)
Ending balance	64.1	75.5
Product warranty liability
Accounts payable and accrued expenses	32.5		38.6
Other non-current liabilities	31.6		34.1
Total product warranty liability	$ 64.1	$ 75.5
Minimum warranty term (in years)	1
Maximum warranty term (in years)	3