Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Operating activities
Consolidated net income	$ 374.2	$ 369.9	$ 141.1
Adjustments to reconcile consolidated net income to net cash flows from operating activities:
Depreciation and amortization	189.9	190.4	184.9
Deferred income taxes	(42.2)	(34.8)	(32.4)
Stock-based compensation expense	56.4	54.7	52.8
Provision for credit losses	5.1	8.1	5.3
Equity in investments of unconsolidated entities	3.3	17.4	7.4
Gain on equity method transaction	0.0	0.0	(49.6)
Gain on sale of business	0.0	(45.3)	0.0
Gain on sale of customer assets	(22.7)	(64.0)	0.0
Other, net	3.2	(2.4)	21.2
Changes in operating assets and liabilities:
Accounts receivable	(26.0)	(30.3)	(38.2)
Accounts payable and accrued liabilities	1.1	9.6	(1.5)
Accrued compensation and deferred commissions	37.7	76.9	14.9
Income taxes	(8.0)	23.1	(7.8)
Deferred revenue	25.7	30.1	50.9
Other assets and liabilities	(1.6)	(16.6)	9.8
Cash provided by operating activities	589.7	591.6	316.4
Investing activities
Purchases of investment securities	(22.2)	(16.0)	(15.7)
Proceeds from maturities and sales of investment securities	45.5	27.1	31.1
Capital expenditures	(147.1)	(142.7)	(119.1)
Acquisitions, net of cash acquired	(39.0)	0.0	(0.8)
Proceeds from sale of business	0.0	52.4	0.0
Proceeds from sale of customer assets	22.7	65.0	0.0
Proceeds from sale of equity method investments, net	0.0	0.0	26.2
Purchases of investments in unconsolidated entities	(4.1)	(7.3)	(3.7)
Other, net	4.9	0.2	0.1
Cash used for investing activities	(139.3)	(21.3)	(81.9)
Financing activities
Common shares repurchased	(787.0)	(11.6)	(1.4)
Dividends paid	(76.9)	(69.3)	(63.9)
Proceeds from revolving credit facility	800.0	90.0	260.0
Repayment of revolving credit facility	(450.0)	(105.0)	(365.0)
Proceeds from term facility	375.0	0.0	0.0
Repayment of term facility	350.0	259.4	32.5
Employee taxes withheld for stock awards	(22.8)	(29.1)	(30.2)
Payment of acquisition-related earn-outs	0.0	0.0	(45.5)
Other, net	(3.0)	0.0	0.1
Cash used for financing activities	(514.7)	(384.4)	(278.4)
Effect of exchange rate changes on cash and cash equivalents	36.1	(21.1)	5.2
Net increase (decrease) in cash and cash equivalents	(28.2)	164.8	(38.7)
Cash and cash equivalents—beginning of period	502.7	337.9	376.6
Cash and cash equivalents—end of period	474.5	502.7	337.9
Supplemental disclosure of cash flow information:
Cash paid for income taxes	171.8	115.6	73.2
Cash paid for interest	$ 37.3	$ 47.4	$ 58.4