Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 713	$ 730
Adjustments to reconcile net income to cash provided by operating activities:
Gain from sales of businesses, net	(1)	(4)
Depreciation of fixed assets	168	164
Amortization of intangible assets	313	273
Share-based compensation expense	160	179
Deferred income taxes	21	3
Change in assets and liabilities:
Fiduciary receivables	(447)	412
Short term investments - funds held on behalf of clients	118	(626)
Fiduciary liabilities	329	214
Receivables, net	240	(36)
Accounts payable and accrued liabilities	(347)	(227)
Restructuring reserves	(43)	(68)
Current income taxes	67	172
Pension and other post employment liabilities	(414)	(334)
Other assets and liabilities	(10)	(65)
CASH PROVIDED BY OPERATING ACTIVITIES	867	787
CASH FLOWS FROM INVESTING ACTIVITIES
Sales of long-term investments	171	103
Purchases of long-term investments	(9)	(28)
Net sales of short-term investments - non-fiduciary	66	176
Acquisition of businesses, net of cash acquired	(97)	(102)
Proceeds from sale of businesses	2	9
Capital expenditures	(201)	(151)
CASH (USED FOR) PROVIDED BY INVESTING ACTIVITIES	(68)	7
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	(625)	(828)
Issuance of shares for employee benefit plans	93	165
Issuance of debt	333	1,572
Repayment of debt	(427)	(1,523)
Cash dividends to shareholders	(153)	(150)
Purchase of shares from noncontrolling interests		(24)
Dividends paid to noncontrolling interests	(17)	(21)
CASH USED FOR FINANCING ACTIVITIES	(796)	(809)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	15	(36)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	18	(51)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	272	346
CASH AND CASH EQUIVALENTS AT END OF PERIOD	290	295
Supplemental disclosures:
Interest paid	172	216
Income taxes paid, net of refunds	$ 139	$ 74