Product Warranty (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Product warranty rollforward
Beginning balance	$ 66.8	$ 61.7
Acquisition	4.5	3.0
Provision	38.6	30.2
Payments	(33.2)	(25.6)
Translation adjustment	(1.2)	(1.0)
Ending balance	75.5	68.3
Product warranty liability
Accounts payable and accrued expenses	38.4		37.0
Other non-current liabilities	37.1		29.8
Total product warranty liability	$ 75.5	$ 68.3
Minimum warranty term (in years)	1
Maximum warranty term (in years)	3