Product Warranty (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013 years	Jun. 30, 2012	Dec. 31, 2012
Product warranty rollforward
Beginning balance, January 1	$ 64.9	$ 72.7
Provisions	21.0	17.1
Payments	(18.2)	(16.5)
Translation adjustment	(1.2)	(0.9)
Ending balance, June 30	66.5	72.4
Product warranty liability
Accounts payable and accrued expenses	34.9		33.1
Other non-current liabilities	31.6		31.8
Total product warranty liability	$ 66.5	$ 72.4
Minimum warranty term (in years)	1
Maximum warranty term (in years)	3