Segment and Geographic Area Information - Schedule of Reporting Information (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
Segment Reporting Information [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
Cost of sales									2,160.9	1,870.6	1,619.0
Selling, general and administrative expenses									2,881.5	2,562.0	2,228.3
Operating profit									1,996.8	1,745.2	1,524.5
Depreciation and other amortization expense									812.8	755.2	650.1
Total assets	31,334.7				28,167.5				31,334.7	28,167.5	26,980.8
Capital expenditures									66.0	68.0	40.1
Capitalized software expenditures									45.0	40.0	30.2
Application Software
Segment Reporting Information [Line Items]
Net revenues									3,868.3	3,186.9	2,639.5
Network Software
Segment Reporting Information [Line Items]
Net revenues									1,475.6	1,439.4	1,378.5
Technology Enabled Products
Segment Reporting Information [Line Items]
Net revenues									1,695.3	1,551.5	1,353.8
Operating Segments | Application Software
Segment Reporting Information [Line Items]
Net revenues									3,868.3	3,186.9	2,639.5
Cost of sales									1,220.7	991.1	823.2
Selling, general and administrative expenses									1,624.2	1,375.0	1,102.3
Operating profit									1,023.4	820.8	714.0
Depreciation and other amortization expense									628.8	563.0	455.8
Total assets	23,600.9				20,350.9				23,600.9	20,350.9	18,723.3
Capital expenditures									17.8	20.1	20.7
Capitalized software expenditures									43.7	39.5	28.5
Operating Segments | Network Software
Segment Reporting Information [Line Items]
Net revenues									1,475.6	1,439.4	1,378.5
Cost of sales									220.8	213.8	212.9
Selling, general and administrative expenses									588.3	593.2	595.0
Operating profit									666.5	632.4	570.6
Depreciation and other amortization expense									161.0	162.5	164.2
Total assets	5,348.0				5,363.8				5,348.0	5,363.8	5,467.4
Capital expenditures									4.8	6.4	8.8
Capitalized software expenditures									1.3	0.5	1.7
Operating Segments | Technology Enabled Products
Segment Reporting Information [Line Items]
Net revenues									1,695.3	1,551.5	1,353.8
Cost of sales									719.4	665.7	582.9
Selling, general and administrative expenses									401.6	367.1	321.8
Operating profit									574.3	518.7	449.1
Depreciation and other amortization expense									21.7	29.1	29.8
Total assets	1,498.1				1,485.6				1,498.1	1,485.6	1,502.7
Capital expenditures									11.7	13.8	9.2
Capitalized software expenditures									0.0	0.0	0.0
Corporate
Segment Reporting Information [Line Items]
Net revenues									0.0	0.0	0.0
Cost of sales									0.0	0.0	0.0
Selling, general and administrative expenses									267.4	226.7	209.2
Operating profit									(267.4)	(226.7)	(209.2)
Depreciation and other amortization expense									1.3	0.6	0.3
Total assets	$ 887.7				$ 967.2				887.7	967.2	1,287.4
Capital expenditures									31.7	27.7	1.4
Capitalized software expenditures									$ 0.0	$ 0.0	$ 0.0