Acquisitions - Schedule of Severance Expense Recognized (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Business Combination Separately Recognized Transactions [Line Items]
Total severance expense	$ 12.0	$ 22.0
Total Cost of Revenues [Member]
Business Combination Separately Recognized Transactions [Line Items]
Total severance expense	8.8	15.2
Total Cost of Revenues [Member] | Software-enabled Services [Member]
Business Combination Separately Recognized Transactions [Line Items]
Total severance expense	8.2	14.3
Total Cost of Revenues [Member] | License, Maintenance and Related [Member]
Business Combination Separately Recognized Transactions [Line Items]
Total severance expense	0.6	0.9
Selling and Marketing [Member]
Business Combination Separately Recognized Transactions [Line Items]
Total severance expense	1.4	0.4
Research and Development [Member]
Business Combination Separately Recognized Transactions [Line Items]
Total severance expense	1.6	6.1
General and Administrative [Member]
Business Combination Separately Recognized Transactions [Line Items]
Total severance expense	0.2	0.3
Total Operating Expenses [Member]
Business Combination Separately Recognized Transactions [Line Items]
Total severance expense	$ 3.2	$ 6.8