Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES
NET INCOME		$ 194	$ 206
Adjustments to reconcile net income to total net cash from operating activities:
Depreciation		59	60
Amortization		60	71
Non-cash restructuring charges		11	2
Non-cash lease expense		27	27
Net periodic benefit of defined benefit pension plans		(4)	(8)
Provision for doubtful receivables from clients		8	7
Benefit from deferred income taxes		(9)	(15)
Share-based compensation		24	26
Non-cash foreign exchange (gain)/loss		(1)	11
Other, net		8	10
Changes in operating assets and liabilities, net of effects from purchase of subsidiaries:
Accounts receivable		113	129
Other assets		(53)	11
Other liabilities		(426)	(411)
Provisions		13	8
Net cash from operating activities		24	134
CASH FLOWS USED IN INVESTING ACTIVITIES
Additions to fixed assets and software for internal use		(33)	(42)
Capitalized software costs		(27)	(19)
Acquisitions of operations, net of cash acquired		(15)	(4)
Sale of investments		1	4
Net cash used in investing activities		(74)	(61)
CASH FLOWS FROM/(USED IN) FINANCING ACTIVITIES
Senior notes issued		746	0
Debt issuance costs		(7)	0
Repayments of debt		(1)	(1)
Repurchase of shares		(101)	(104)
Net proceeds/(payments) from fiduciary funds held for clients		1,011	(250)
Payments of deferred and contingent consideration related to acquisitions		0	(6)
Cash paid for employee taxes on withholding shares		(5)	(5)
Dividends paid		(86)	(87)
Acquisitions of and dividends paid to non-controlling interests		(1)	0
Net cash from/(used in) financing activities		1,556	(453)
INCREASE/(DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	[1]	1,506	(380)
Effect of exchange rate changes on cash, cash equivalents and restricted cash		(47)	21
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD	[1]	3,792	4,721
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD	[1]	$ 5,251	$ 4,362

[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.