Revenues from Contracts - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Total Revenue	$ 1,350.3	$ 1,232.1	$ 3,940.9	$ 3,577.2
Application Software
Disaggregation of Revenue [Line Items]
Total Revenue	644.0	600.2	1,899.7	1,761.2
Network Software
Disaggregation of Revenue [Line Items]
Total Revenue	346.6	316.0	1,028.0	901.3
Technology Enabled Products
Disaggregation of Revenue [Line Items]
Total Revenue	359.7	315.9	1,013.2	914.7
Software related
Disaggregation of Revenue [Line Items]
Total Revenue	994.1	918.4	2,937.2	2,668.5
Software related | Application Software
Disaggregation of Revenue [Line Items]
Total Revenue	644.0	600.2	1,899.7	1,761.2
Software related | Network Software
Disaggregation of Revenue [Line Items]
Total Revenue	346.6	316.0	1,028.0	901.3
Software related | Technology Enabled Products
Disaggregation of Revenue [Line Items]
Total Revenue	3.5	2.2	9.5	6.0
Recurring
Disaggregation of Revenue [Line Items]
Total Revenue	721.8	646.8	2,128.3	1,890.7
Recurring | Application Software
Disaggregation of Revenue [Line Items]
Total Revenue	471.1	431.3	1,390.5	1,272.4
Recurring | Network Software
Disaggregation of Revenue [Line Items]
Total Revenue	247.5	213.4	729.2	612.8
Recurring | Technology Enabled Products
Disaggregation of Revenue [Line Items]
Total Revenue	3.2	2.1	8.6	5.5
Reoccurring
Disaggregation of Revenue [Line Items]
Total Revenue	92.0	97.3	274.8	269.1
Reoccurring | Application Software
Disaggregation of Revenue [Line Items]
Total Revenue	30.0	28.9	90.3	82.5
Reoccurring | Network Software
Disaggregation of Revenue [Line Items]
Total Revenue	62.0	68.4	184.5	186.6
Reoccurring | Technology Enabled Products
Disaggregation of Revenue [Line Items]
Total Revenue	0.0	0.0	0.0	0.0
Non-recurring
Disaggregation of Revenue [Line Items]
Total Revenue	180.3	174.3	534.1	508.7
Non-recurring | Application Software
Disaggregation of Revenue [Line Items]
Total Revenue	142.9	140.0	418.9	406.3
Non-recurring | Network Software
Disaggregation of Revenue [Line Items]
Total Revenue	37.1	34.2	114.3	101.9
Non-recurring | Technology Enabled Products
Disaggregation of Revenue [Line Items]
Total Revenue	0.3	0.1	0.9	0.5
Product Revenue
Disaggregation of Revenue [Line Items]
Total Revenue	356.2	313.7	1,003.7	908.7
Product Revenue | Application Software
Disaggregation of Revenue [Line Items]
Total Revenue	0.0	0.0	0.0	0.0
Product Revenue | Network Software
Disaggregation of Revenue [Line Items]
Total Revenue	0.0	0.0	0.0	0.0
Product Revenue | Technology Enabled Products
Disaggregation of Revenue [Line Items]
Total Revenue	$ 356.2	$ 313.7	$ 1,003.7	$ 908.7