Business Segments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting Information [Line Items]
Net revenues:	$ 1,716.8	$ 1,531.2	$ 3,397.5	$ 3,000.9
Percent change in net revenues	12.10%		13.20%
Gross profit:	$ 1,193.3	1,067.1	$ 2,374.3	2,085.7
Percent change in gross profit	11.80%		13.80%
Operating profit	$ 556.9	493.4	$ 1,099.7	949.6
Percent change in operating profit	12.90%		15.80%
Long-lived assets:	$ 246.1	220.4	$ 246.1	220.4
Percent change in long-lived assets	11.70%
Corporate
Segment Reporting Information [Line Items]
Unallocated corporate general and administrative expenses	$ 62.7	58.1	124.2	113.3
Application Software
Segment Reporting Information [Line Items]
Net revenues:	$ 931.8	770.3	$ 1,827.0	1,531.7
Percent change in net revenues	21.00%		19.30%
Gross profit:	$ 641.1	531.0	$ 1,266.8	1,051.5
Percent change in gross profit	20.70%		20.50%
Operating profit	$ 251.1	201.2	$ 490.7	394.4
Percent change in operating profit	24.80%		24.40%
Long-lived assets:	$ 189.0	161.9	$ 189.0	161.9
Percent change in long-lived assets	16.70%
Network Software
Segment Reporting Information [Line Items]
Net revenues:	$ 364.2	358.1	$ 735.0	712.6
Percent change in net revenues	1.70%		3.10%
Gross profit:	$ 307.8	303.9	$ 624.1	603.3
Percent change in gross profit	1.30%		3.40%
Operating profit	$ 159.1	153.1	$ 326.1	300.6
Percent change in operating profit	3.90%		8.50%
Long-lived assets:	$ 23.8	28.7	$ 23.8	28.7
Percent change in long-lived assets	(17.10%)
Technology Enabled Products
Segment Reporting Information [Line Items]
Net revenues:	$ 420.8	402.8	$ 835.5	756.6
Percent change in net revenues	4.50%		10.40%
Gross profit:	$ 244.4	232.2	$ 483.4	430.9
Percent change in gross profit	5.30%		12.20%
Operating profit	$ 146.7	139.1	$ 282.9	254.6
Percent change in operating profit	5.50%		11.10%
Long-lived assets:	$ 33.3	$ 29.8	$ 33.3	$ 29.8
Percent change in long-lived assets	11.70%