Consolidated Statement of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities:
Net earnings	$ 1,075.1	$ 898.1
Adjustments to reconcile net earnings to net cash provided by operating activities:
Net gain on investments and other	(11.9)	(1.8)
Depreciation and amortization	484.2	419.3
Change in estimated acquisition earnout payables	10.2	2.7
Amortization of deferred compensation and restricted stock	60.7	58.1
Stock-based and other noncash compensation expense	25.5	21.1
Payments on acquisition earnouts in excess of original estimates	(479.9)	(23.3)
Provision for deferred income taxes	26.8	5.6
Effect of changes in foreign exchange rates	50.2	0.6
Net change in accounts receivable, net	(681.1)	(469.2)
Net change in deferred revenue	58.0	55.3
Net change in other current assets	(0.1)	2.7
Net change in accrued compensation and other accrued liabilities	(132.3)	(94.5)
Net change in income taxes payable	(37.3)	0.6
Net change in other noncurrent assets and liabilities	(2.4)	33.5
Net cash provided by operating activities	445.7	908.8
Cash flows from investing activities:
Capital expenditures	(67.6)	(61.5)
Cash paid for acquisitions, net of cash and restricted cash acquired	(1,661.6)	(518.6)
Net proceeds from sales of operations/books of business	2.2	1.7
Net funding of investment transactions	0.9	0.8
Net funding of premium finance loans	105.6	78.0
Net cash used by investing activities	(1,620.5)	(499.6)
Cash flows from financing activities:
Payments on acquisition earnouts	(349.6)	(104.4)
Proceeds from issuance of common stock	1,378.4	93.5
Payments to noncontrolling interests	0.0	(4.1)
Dividends paid	(332.6)	(262.0)
Net change in fiduciary assets and liabilities	891.9	(103.1)
Net borrowings on premium financing debt facility	(76.3)	(73.1)
Borrowings on line of credit facility	3.3	1,663.2
Repayments on line of credit facility	(3.3)	(1,826.9)
Net borrowings of corporate related long-term debt	(199.2)	567.5
Debt acquisition costs	4.7	(8.4)
Settlements on terminated interest rate swaps	0.0	(1.4)
Net cash provided by (used by) financing activities	1,317.3	(59.2)
Effect of changes in foreign exchange rates on cash, cash equivalents, restricted cash and fiduciary cash	195.4	(55.5)
Net increase in cash, cash equivalents, restricted cash and fiduciary cash	337.9	294.5
Cash, cash equivalents, restricted cash and fiduciary cash at beginning of period	20,468.6	6,543.3
Cash, cash equivalents, restricted cash and fiduciary cash at end of period	$ 20,806.5	$ 6,837.8