Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities
Net income	$ 467	$ 418	$ 2,121	$ 1,980
Adjustments to reconcile net income to cash provided by operating activities:
Gain from sales of businesses	0	(6)	0	(53)
Depreciation of fixed assets	42	37	119	115
Amortization and impairment of intangible assets	20	34	70	87
Share-based compensation expense			321	304
Deferred income taxes			(232)	(87)
Other, net			28	1
Change in assets and liabilities:
Receivables, net			(290)	(146)
Accounts payable and accrued liabilities			(357)	(255)
Current income taxes			58	136
Pension, other postretirement and postemployment liabilities			3	(45)
Other assets and liabilities			333	140
Cash provided by operating activities			2,174	2,177
Cash flows from investing activities
Proceeds from investments			59	71
Purchases of investments			(61)	(95)
Net sales of short-term investments - non fiduciary			274	15
Acquisition of businesses, net of cash and funds held on behalf of clients			(18)	(154)
Sale of businesses, net of cash and funds held on behalf of clients			1	80
Capital expenditures			(203)	(126)
Cash provided by (used for) investing activities			52	(209)
Cash flows from financing activities
Share repurchase			(1,950)	(2,528)
Proceeds from issuance of shares			63	49
Cash paid for employee taxes on withholding shares			(232)	(205)
Commercial paper issuances, net of repayments			(274)	(425)
Issuance of debt			744	1,967
Increase in fiduciary liabilities, net of fiduciary receivables			870	1,200
Cash dividends to shareholders			(366)	(347)
Noncontrolling interests and other financing activities			(56)	(50)
Cash used for financing activities			(1,201)	(339)
Effect of exchange rates on cash and cash equivalents and funds held on behalf of clients			(57)	(1,079)
Net increase in cash and cash equivalents and funds held on behalf of clients			968	550
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	8,044	7,195	8,044	7,195
Reconciliation of cash and cash equivalents and funds held on behalf of clients:
Cash and cash equivalents	808	692	808	692
Cash and cash equivalents classified as held for sale	6	0	6	0
Funds held on behalf of clients	7,230	6,503	7,230	6,503
Total cash and cash equivalents and funds held on behalf of clients	$ 8,044	$ 7,195	8,044	7,195
Supplemental disclosures:
Interest paid			309	219
Income taxes paid, net of refunds			$ 613	$ 418