Product Warranty (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Dec. 31, 2017
Product warranty rollforward
Beginning balance, January 1	$ 111.5	$ 95.3
Provisions	35.3	43.9
Acquisitions	0.2	0.0
Payments	(29.8)	(32.2)
Translation adjustment	(2.5)	3.9
Ending balance, June 30	114.7	110.9
Change in year-over-year warranty provision	8.6
Accounts payable and accrued expenses			$ 67.9	$ 69.0
Other non-current liabilities			46.8	42.5
Total product warranty liability	$ 111.5	$ 95.3	$ 114.7	$ 111.5