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Use of Estimates - Warranty (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Accounting Policies [Abstract]      
Balance at beginning of year $ 34.8 $ 33.7 $ 33.4
Acquisitions 1.6 0.4 1.0
Impact of initial adoption of ASC 606 0.0 0.0 0.4
Provisions 14.6 14.0 11.9
Usage (12.8) (13.2) (12.9)
Currency translation adjustment 0.2 (0.1) (0.1)
Balance at end of year 38.4 34.8 33.7
Less: Current portion of warranty 13.3 12.5 11.9
Non-current portion of warranty $ 25.1 $ 22.3 $ 21.8