Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Net revenues	$ 1,882.8	$ 1,680.7
Cost of sales	589.1	499.7
SG&A expenses	767.9	699.7
Capital expenditures	9.5	9.3
Operating Segments
Segment Reporting Information [Line Items]
Net revenues	1,882.8	1,680.7
Cost of sales	589.1	499.7
SG&A expenses	696.6	638.2
Operating profit	597.1	542.8
Depreciation and other amortization	212.3	194.0
Capital expenditures	9.3	8.7
Capitalized software expenditures	12.4	9.6
Total assets:	30,463.1		$ 30,447.0
Corporate
Segment Reporting Information [Line Items]
Unallocated corporate general and administrative expenses	71.3	61.5
Application Software
Segment Reporting Information [Line Items]
Net revenues	1,068.2	895.2
Application Software | Operating Segments
Segment Reporting Information [Line Items]
Net revenues	1,068.2	895.2
Cost of sales	347.4	269.5
SG&A expenses	444.0	386.1
Operating profit	276.8	239.6
Depreciation and other amortization	165.6	147.7
Capital expenditures	4.3	4.7
Capitalized software expenditures	12.4	9.5
Total assets:	23,474.1		23,600.9
Network Software
Segment Reporting Information [Line Items]
Net revenues	375.9	370.8
Network Software | Operating Segments
Segment Reporting Information [Line Items]
Net revenues	375.9	370.8
Cost of sales	60.3	54.5
SG&A expenses	148.9	149.3
Operating profit	166.7	167.0
Depreciation and other amortization	41.3	40.3
Capital expenditures	2.6	1.3
Capitalized software expenditures	0.0	0.1
Total assets:	5,312.1		5,348.0
Technology Enabled Products
Segment Reporting Information [Line Items]
Net revenues	438.7	414.7
Technology Enabled Products | Operating Segments
Segment Reporting Information [Line Items]
Net revenues	438.7	414.7
Cost of sales	181.4	175.7
SG&A expenses	103.7	102.8
Operating profit	153.6	136.2
Depreciation and other amortization	5.4	6.0
Capital expenditures	2.4	2.7
Capitalized software expenditures	0.0	$ 0.0
Total assets:	$ 1,676.9		$ 1,498.1