CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating cash flows:
Net income before non-controlling interests	$ 3,802	$ 3,087	$ 3,174
Adjustments to reconcile net income provided by operations:
Depreciation and amortization of fixed assets and capitalized software	370	381	382
Amortization of intangible assets	343	338	365
Non-cash lease expense	288	404	327
Adjustments and payments related to contingent consideration assets and liabilities	(11)	11	27
Deconsolidation of Russian businesses	0	39	0
Gain on consolidation of entity	0	(2)	(267)
Net (gain) on investments	(5)	(21)	(61)
Net loss (gain) on disposition of assets	16	(127)	(33)
Share-based compensation expense	363	367	348
Changes in assets and liabilities:
Net receivables	(467)	(492)	(570)
Other assets	(154)	(122)	(354)
Accrued compensation and employee benefits	195	171	574
Provision for taxes, net of payments and refunds	105	(54)	(33)
Contributions to pension and other benefit plans in excess of current year credit	(335)	(385)	(372)
Other liabilities	64	193	358
Operating lease liabilities	(316)	(323)	(349)
Net cash provided by operations	4,258	3,465	3,516
Financing cash flows:
Purchase of treasury shares	(1,150)	(1,950)	(1,159)
Issuance of commercial paper with maturity greater than 90 days	146	0	0
Repayment of commercial paper with maturity greater than 90 days	(146)	0	0
Proceeds from issuance of debt	2,169	984	743
Repayments of debt	(266)	(365)	(1,016)
Purchase of non-controlling interests	(139)	(7)	0
Shares withheld for taxes on vested units – treasury shares	(148)	(198)	(101)
Issuance of common stock from treasury shares	199	126	161
Payments of deferred and contingent consideration for acquisitions	(202)	(158)	(117)
Receipts of contingent consideration for dispositions	2	3	71
Distributions of non-controlling interests	(31)	(27)	(36)
Dividends paid	(1,298)	(1,138)	(1,026)
Change in fiduciary liabilities	(255)	1,684	1,183
Net cash used for financing activities	(1,119)	(1,046)	(1,297)
Investing cash flows:
Capital expenditures	(416)	(470)	(406)
Purchases of long-term investments	(57)	(22)	(28)
Sales of long-term investments	38	86	41
Dispositions	(17)	119	84
Acquisitions, net of cash and cash held in a fiduciary capacity acquired	(976)	(572)	(859)
Other, net	11	9	4
Net cash used for investing activities	(1,417)	(850)	(1,164)
Effect of exchange rate changes on cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity	328	(841)	(355)
Increase in cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity	2,050	728	700
Cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity at beginning of year	12,102	11,374	10,674
Cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity at end of year	14,152	12,102	11,374
Cash and cash equivalents	3,358	1,442	1,752
Cash and cash equivalents held in a fiduciary capacity	10,794	10,660	9,622
Total cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity	$ 14,152	$ 12,102	$ 11,374