Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenue	$ 2,445.5	$ 2,275.1	$ 2,038.6
Operating expense:
Cost of revenue	952.9	895.7	843.5
Sales and marketing	467.0	441.0	423.8
General and administrative	334.0	327.2	355.8
Depreciation and amortization	189.9	190.4	184.9
Total operating expense	1,943.8	1,854.3	1,808.0
Gain on sale of customer assets	22.7	64.0	0.0
Other operating income	2.2	0.0	0.0
Operating income	526.6	484.8	230.6
Non-operating income (expense), net:
Interest expense, net	(28.6)	(37.7)	(51.7)
Gain on sale of business	0.0	45.3	0.0
Expense from equity method transaction, net	0.0	0.0	(11.8)
Other income (expense), net	1.0	(1.1)	14.4
Non-operating income (expense), net	(27.6)	6.5	(49.1)
Income before income taxes and equity in investments of unconsolidated entities	499.0	491.3	181.5
Equity in investments of unconsolidated entities	(3.3)	(17.4)	(7.4)
Income tax expense	121.5	104.0	33.0
Consolidated net income	$ 374.2	$ 369.9	$ 141.1
Net income per share:
Basic net income per share (in dollars per share)	$ 8.93	$ 8.64	$ 3.31
Diluted net income per share (in dollars per share)	8.87	8.58	3.29
Dividends per common share:
Dividends declared per common share (in dollars per share)	1.87	1.67	1.53
Dividends paid per common share (in dollars per share)	$ 1.82	$ 1.62	$ 1.50
Weighted average shares outstanding:
Basic (in shares)	41.9	42.8	42.6
Diluted (in shares)	42.2	43.1	42.9