Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenue	$ 2,275.1	$ 2,038.6	$ 1,870.6
Operating expense:
Cost of revenue	895.7	843.5	779.3
Sales and marketing	441.0	423.8	356.5
General and administrative	327.2	355.8	400.4
Depreciation and amortization	190.4	184.9	166.6
Total operating expense	1,854.3	1,808.0	1,702.8
Gain on sale of customer assets	64.0	0.0	0.0
Operating income	484.8	230.6	167.8
Non-operating income (expense), net:
Interest expense, net	(37.7)	(51.7)	(28.4)
Net realized gains (losses) on sale of investments, reclassified from other comprehensive income	3.8	2.9	(2.1)
Gain on sale of business	45.3	0.0	0.0
Expense from equity method transaction, net	0.0	(11.8)	0.0
Other income (expense), net	(4.9)	11.5	(6.7)
Non-operating income (expense), net	6.5	(49.1)	(37.2)
Income before income taxes and equity in investments of unconsolidated entities	491.3	181.5	130.6
Equity in investments of unconsolidated entities	(17.4)	(7.4)	(3.6)
Income tax expense	104.0	33.0	56.5
Consolidated net income	$ 369.9	$ 141.1	$ 70.5
Net income per share:
Basic net income per share (in dollars per share)	$ 8.64	$ 3.31	$ 1.65
Diluted net income per share (in dollars per share)	8.58	3.29	1.64
Dividends per common share:
Dividends declared per common share (in dollars per share)	1.67	1.53	1.46
Dividends paid per common share (in dollars per share)	$ 1.62	$ 1.50	$ 1.44
Weighted average shares outstanding:
Basic (in shares)	42.8	42.6	42.6
Diluted (in shares)	43.1	42.9	42.9