Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating activities
Consolidated net income	$ 369.9	$ 141.1	$ 70.5
Adjustments to reconcile consolidated net income to net cash flows from operating activities:
Depreciation and amortization	190.4	184.9	166.6
Deferred income taxes	(34.8)	(32.4)	(37.3)
Stock-based compensation expense	54.7	52.8	83.2
Provision for bad debt	8.1	5.3	3.8
Equity in investments of unconsolidated entities	17.4	7.4	3.6
Gain on equity method transaction	0.0	(49.6)	0.0
Gain on sale of business	(45.3)	0.0	0.0
Gain on sale of customer assets	(64.0)	0.0	0.0
Acquisition earn-out accrual	0.0	0.0	4.5
Other, net	(2.4)	(21.2)	(14.9)
Changes in operating assets and liabilities:
Accounts receivable	(30.3)	(38.2)	(38.6)
Accounts payable and accrued liabilities	9.6	(1.5)	(2.0)
Accrued compensation and deferred commissions	76.9	14.9	(37.5)
Income taxes	23.1	(7.8)	18.9
Deferred revenue	30.1	50.9	60.0
Other assets and liabilities	(16.6)	9.8	(12.8)
Cash provided by operating activities	591.6	316.4	297.8
Investing activities
Purchases of investment securities	(16.0)	(15.7)	(36.5)
Proceeds from maturities and sales of investment securities	27.1	31.1	43.0
Capital expenditures	(142.7)	(119.1)	(129.5)
Acquisitions, net of cash acquired	0.0	(0.8)	(646.7)
Proceeds from sale of business	52.4	0.0	0.0
Proceeds from sale of customer assets	65.0	0.0	0.0
Proceeds from sale of equity method investments, net	0.0	26.2	0.0
Purchases of investments in unconsolidated entities	(7.3)	(3.7)	(29.4)
Other, net	0.2	0.1	(0.2)
Cash used for investing activities	(21.3)	(81.9)	(799.3)
Financing activities
Common shares repurchased	(11.6)	(1.4)	(226.0)
Dividends paid	(69.3)	(63.9)	(61.5)
Proceeds from revolving credit facility	90.0	260.0	475.0
Repayment of revolving credit facility	(105.0)	(365.0)	(355.0)
Proceeds from term facility	0.0	0.0	650.0
Repayment of term facility	259.4	32.5	19.1
Employee taxes withheld for stock awards	(29.1)	(30.2)	(29.9)
Payment of acquisition-related earn-outs	0.0	(45.5)	(16.2)
Other, net	0.0	0.1	(2.2)
Cash provided by (used for) financing activities	(384.4)	(278.4)	415.1
Effect of exchange rate changes on cash and cash equivalents	(21.1)	5.2	(20.8)
Net increase (decrease) in cash and cash equivalents	164.8	(38.7)	(107.2)
Cash and cash equivalents—beginning of period	337.9	376.6	483.8
Cash and cash equivalents—end of period	502.7	337.9	376.6
Supplemental disclosure of cash flow information:
Cash paid for income taxes	115.6	73.2	75.3
Cash paid for interest	$ 47.4	$ 58.4	$ 28.4