Remaining performance obligation, description of practical expedient

In accordance with the practical expedient provided in ASC Topic 606, performance obligations that are billed and recognized as they are delivered, primarily professional services contracts that are on a time and materials basis, are excluded from the transaction price for remaining performance obligations disclosed above.

Revenue - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Revenue [Line Items]
Contract asset	$ 69.9		$ 69.9		$ 62.7
Remaining performance obligation, description of practical expedient			In accordance with the practical expedient provided in ASC Topic 606, performance obligations that are billed and recognized as they are delivered, primarily professional services contracts that are on a time and materials basis, are excluded from the transaction price for remaining performance obligations disclosed above.
Recurring [Member]
Revenue [Line Items]
Float revenue	$ 14.7	$ 10.4	$ 26.1	$ 21.1