Revenue Recognition - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Period for credit risk identified		30 days
Sales revenues totaling	$ 5.7	$ 8.5
Lease revenue	97.9	200.1
Operating lease revenue	97.2	198.9
Finance lease revenue	0.7	1.2
Finance lease revenue, sales revenue		1.0
Finance lease revenue, interest income		$ 0.2
Period for warranties for rental equipment		90 days
Period for warranties for equipment manufactured		1 year
Deferred Income [Member]
Disaggregation Of Revenue [Line Items]
Customer contract liability	29.5	$ 29.5	$ 17.5
Accounts Receivable [Member]
Disaggregation Of Revenue [Line Items]
Unbilled contract assets	$ 1.2	$ 1.2	$ 1.0