CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net income before non-controlling interests	$ 553	$ 426
Adjustments to reconcile net income before non-controlling interests to net cash provided by operating activities:
Amortization	86	83
Depreciation	21	20
Non-cash stock-based compensation	52	45
Change in estimated acquisition earn-out payables	(2)	0
Deferred income taxes	(3)	2
Amortization of debt discount	2	2
Net gain on sales/disposals of investments, fixed assets and customer accounts	(29)	(5)
Payments on acquisition earn-outs in excess of original estimated payables	(31)	(18)
Changes in operating assets and liabilities, net of effect from acquisitions and divestitures:
Commissions, fees and other receivables (increase) decrease	(140)	(103)
Reinsurance recoverable (increase) decrease	26	644
Prepaid reinsurance premiums (increase) decrease	(21)	(58)
Other assets (increase) decrease	(80)	(56)
Losses and loss adjustment reserve increase (decrease)	(23)	(642)
Unearned premiums increase (decrease)	140	75
Accounts payable increase (decrease)	(54)	101
Accrued expenses and other liabilities increase (decrease)	(109)	(100)
Other liabilities increase (decrease)	(15)	(28)
Net cash provided by operating activities	373	388
Cash flows from investing activities:
Additions to fixed assets	(39)	(25)
Payments for businesses acquired, net of cash acquired	(98)	(115)
Proceeds from sales of businesses, fixed assets and customer accounts	58	6
Purchases of investments	(2)	(6)
Proceeds from sales of investments	4	6
Net cash used in investing activities	(77)	(134)
Cash flows from financing activities:
Fiduciary receivables and liabilities, net	248	224
Payments on acquisition earn-outs	(65)	(46)
Proceeds from long-term debt	599
Payments on long-term debt	(175)	(229)
Borrowings on revolving credit facility	150	170
Payments on revolving credit facility	(250)	(70)
Repurchase shares to fund tax withholdings for non-cash stock-based compensation	(54)	(39)
Cash dividends paid	(75)	(65)
Other financing activities	(3)	1
Net cash provided by/(used in) financing activities	375	(54)
Effect of foreign exchange rate changes on cash and cash equivalents inclusive of fiduciary cash		30
Net increase in cash and cash equivalents inclusive of fiduciary cash	671	230
Cash and cash equivalents inclusive of fiduciary cash at beginning of period	2,303	2,033
Cash and cash equivalents inclusive of fiduciary cash at end of period	$ 2,974	$ 2,263