Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities
Net income	$ 575	$ 514	$ 1,654	$ 1,562
Adjustments to reconcile net income to cash provided by operating activities:
Gain from sales of businesses	0	(22)	0	(47)
Depreciation of fixed assets	39	40	77	78
Amortization and impairment of intangible assets	25	25	50	53
Share-based compensation expense			226	211
Deferred income taxes			(168)	(36)
Other, net			28	1
Change in assets and liabilities:
Receivables, net			(704)	(674)
Accounts payable and accrued liabilities			(515)	(408)
Current income taxes			53	137
Pension, other postretirement and postemployment liabilities			(3)	(37)
Other assets and liabilities			433	291
Cash provided by operating activities			1,131	1,131
Cash flows from investing activities
Proceeds from investments			54	65
Purchases of investments			(29)	(39)
Net sales of short-term investments - non fiduciary			255	38
Acquisition of businesses, net of cash and funds held on behalf of clients			(8)	(143)
Sale of businesses, net of cash and funds held on behalf of clients			1	22
Capital expenditures			(145)	(68)
Cash provided by (used for) investing activities			128	(125)
Cash flows from financing activities
Share repurchase			(1,100)	(1,328)
Proceeds from issuance of shares			33	26
Cash paid for employee taxes on withholding shares			(216)	(192)
Commercial paper issuances, net of repayments			(217)	(409)
Issuance of debt			744	1,471
Increase in fiduciary liabilities, net of fiduciary receivables			999	661
Cash dividends to shareholders			(241)	(229)
Noncontrolling interests and other financing activities			(41)	(37)
Cash used for financing activities			(39)	(37)
Effect of exchange rates on cash and cash equivalents and funds held on behalf of clients			203	(423)
Net increase in cash and cash equivalents and funds held on behalf of clients			1,423	546
Cash, cash equivalents and funds held on behalf of clients at beginning of period			7,076	6,645
Cash, cash equivalents and funds held on behalf of clients at end of period	8,499	7,191	8,499	7,191
Reconciliation of cash and cash equivalents and funds held on behalf of clients:
Cash and cash equivalents	952	740	952	740
Cash and cash equivalents classified as held for sale	9	0	9	0
Funds held on behalf of clients	7,538	6,451	7,538	6,451
Total cash and cash equivalents and funds held on behalf of clients	$ 8,499	$ 7,191	8,499	7,191
Supplemental disclosures:
Interest paid			220	155
Income taxes paid, net of refunds			$ 461	$ 275