Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 788	$ 713
Adjustments to reconcile net income to cash provided by operating activities:
Gain from sales of businesses and investments, net	(28)	(1)
Depreciation of fixed assets	177	168
Amortization of intangible assets	296	313
Share-based compensation expense	207	160
Deferred income taxes	100	21
Change in assets and liabilities:
Fiduciary receivables	684	(447)
Short term investments - funds held on behalf of clients	(369)	118
Fiduciary liabilities	(315)	329
Receivables, net	374	240
Accounts payable and accrued liabilities	(330)	(347)
Restructuring reserves	(7)	(43)
Current income taxes	(197)	67
Pension, other post-retirement and other post-employment liabilities	(401)	(414)
Other assets and liabilities	5	(10)
CASH PROVIDED BY OPERATING ACTIVITIES	984	867
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from sale of long-term investments	81	171
Purchases of long-term investments	(13)	(9)
Net (purchases) sales of short-term investments - non-fiduciary	(13)	66
Acquisition of businesses, net of cash acquired	(26)	(97)
Proceeds from sale of businesses	6	2
Capital expenditures	(174)	(201)
CASH USED FOR INVESTING ACTIVITIES	(139)	(68)
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	(1,025)	(625)
Issuance of shares for employee benefit plans	84	93
Issuance of debt	4,270	333
Repayment of debt	(3,870)	(427)
Cash dividends to shareholders	(159)	(153)
Purchase of shares from noncontrolling interests	(6)	0
Dividends paid to noncontrolling interests	(13)	(17)
CASH USED FOR FINANCING ACTIVITIES	(719)	(796)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(48)	15
NET INCREASE IN CASH AND CASH EQUIVALENTS	78	18
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	291	272
CASH AND CASH EQUIVALENTS AT END OF PERIOD	369	290
Supplemental disclosures:
Interest paid	186	172
Income taxes paid, net of refunds	$ 330	$ 139