Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021
CASH FLOWS FROM/(USED IN) OPERATING ACTIVITIES
NET INCOME		$ 431	$ 1,829
Adjustments to reconcile net income to total net cash from operating activities:
Depreciation		191	212
Amortization		239	286
Impairment		81	0
Non-cash restructuring charges		56	0
Non-cash lease expense		94	108
Net periodic benefit of defined benefit pension plans		(113)	(125)
Provision for doubtful receivables from clients		13	13
(Benefit from)/provision for deferred income taxes		(92)	41
Share-based compensation		71	71
Net loss/(gain) on disposal of operations		76	(380)
Non-cash foreign exchange gain		(178)	(5)
Other, net		(1)	(21)
Changes in operating assets and liabilities, net of effects from purchase of subsidiaries:
Accounts receivable		270	175
Other assets		(198)	(135)
Other liabilities		(510)	(199)
Provisions		7	7
Net cash from operating activities		437	1,877
CASH FLOWS (USED IN)/FROM INVESTING ACTIVITIES
Additions to fixed assets and software for internal use		(100)	(109)
Capitalized software costs		(50)	(40)
Acquisitions of operations, net of cash acquired		(80)	0
Proceeds from sale of operations		1	726
Cash and fiduciary funds transferred in sale of operations		(29)	(216)
Sale of investments		200	0
Net cash (used in)/from investing activities		(58)	361
CASH FLOWS USED IN FINANCING ACTIVITIES
Senior notes issued		750	0
Debt issuance costs		(5)	0
Repayments of debt		(585)	(970)
Repurchase of shares		(3,090)	(1,000)
Proceeds from issuance of shares		7	2
Net proceeds from fiduciary funds held for clients		157	49
Payments of deferred and contingent consideration related to acquisitions		(22)	(19)
Cash paid for employee taxes on withholding shares		(32)	(8)
Dividends paid		(280)	(275)
Acquisitions of and dividends paid to non-controlling interests		(9)	(35)
Net cash used in financing activities		(3,109)	(2,256)
DECREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	[1]	(2,730)	(18)
Effect of exchange rate changes on cash, cash equivalents and restricted cash		(290)	(99)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD	[1]	7,691	6,301
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD	[1]	$ 4,671	$ 6,184

[1] The amounts of cash, cash equivalents and restricted cash, their respective classification on the condensed consolidated balance sheets, as well as their respective portions of the increase or decrease in cash, cash equivalents and restricted cash for each of the periods presented have been included in Note 19 — Supplemental Disclosures of Cash Flow Information.