Summary of Accounting Policies - Disaggregated Revenue (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Net revenues	$ 1,877.1	$ 1,764.6	$ 1,716.8	$ 1,680.7	$ 1,613.5	$ 1,563.4	$ 1,531.2	$ 1,469.7	$ 7,039.2	$ 6,177.8	$ 5,371.8
Application Software
Disaggregation of Revenue [Line Items]
Net revenues									3,868.3	3,186.9	2,639.5
Network Software
Disaggregation of Revenue [Line Items]
Net revenues									1,475.6	1,439.4	1,378.5
Technology Enabled Products
Disaggregation of Revenue [Line Items]
Net revenues									1,695.3	1,551.5	1,353.8
Software related
Disaggregation of Revenue [Line Items]
Net revenues									5,370.0	4,645.1	4,031.2
Software related | Application Software
Disaggregation of Revenue [Line Items]
Net revenues									3,868.3	3,186.9	2,639.5
Software related | Network Software
Disaggregation of Revenue [Line Items]
Net revenues									1,475.6	1,439.4	1,378.5
Software related | Technology Enabled Products
Disaggregation of Revenue [Line Items]
Net revenues									26.1	18.8	13.2
Recurring
Disaggregation of Revenue [Line Items]
Net revenues									3,976.2	3,511.1	2,939.4
Recurring | Application Software
Disaggregation of Revenue [Line Items]
Net revenues									2,880.0	2,454.3	1,946.0
Recurring | Network Software
Disaggregation of Revenue [Line Items]
Net revenues									1,070.1	1,039.5	981.4
Recurring | Technology Enabled Products
Disaggregation of Revenue [Line Items]
Net revenues									26.1	17.3	12.0
Reoccurring
Disaggregation of Revenue [Line Items]
Net revenues									624.2	401.2	370.4
Reoccurring | Application Software
Disaggregation of Revenue [Line Items]
Net revenues									353.9	137.8	124.2
Reoccurring | Network Software
Disaggregation of Revenue [Line Items]
Net revenues									270.3	263.4	246.2
Reoccurring | Technology Enabled Products
Disaggregation of Revenue [Line Items]
Net revenues									0.0	0.0	0.0
Non-recurring
Disaggregation of Revenue [Line Items]
Net revenues									769.6	732.8	721.4
Non-recurring | Application Software
Disaggregation of Revenue [Line Items]
Net revenues									634.4	594.8	569.3
Non-recurring | Network Software
Disaggregation of Revenue [Line Items]
Net revenues									135.2	136.5	150.9
Non-recurring | Technology Enabled Products
Disaggregation of Revenue [Line Items]
Net revenues									0.0	1.5	1.2
Product Revenue
Disaggregation of Revenue [Line Items]
Net revenues									1,669.2	1,532.7	1,340.6
Product Revenue | Application Software
Disaggregation of Revenue [Line Items]
Net revenues									0.0	0.0	0.0
Product Revenue | Network Software
Disaggregation of Revenue [Line Items]
Net revenues									0.0	0.0	0.0
Product Revenue | Technology Enabled Products
Disaggregation of Revenue [Line Items]
Net revenues									$ 1,669.2	$ 1,532.7	$ 1,340.6