Revenues - Disaggregation of Revenues by Source (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,328.7	$ 1,259.0	$ 2,623.7	$ 2,492.4
Software-enabled Services [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,070.7	1,057.1	2,155.9	2,100.5
Maintenance and Term Licenses [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	223.8	166.5	402.1	329.7
Professional Services [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	27.0	25.7	53.7	49.2
Perpetual Licenses [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 7.2	$ 9.7	$ 12.0	$ 13.0