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Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Sales of rental equipment	$ 19.3	$ 30.3	$ 47.0	$ 74.5
Sales of new equipment	2.5	1.8	4.3	3.7
Sales of parts and supplies	6.9	6.0	12.8	10.2
Total	$ 28.7	$ 38.1	$ 64.1	$ 88.4