Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 503	$ 522
Adjustments to reconcile net income to cash provided by operating activities:
Gain from sales of businesses, net		(4)
Depreciation of fixed assets	112	111
Amortization of intangible assets	208	182
Share-based compensation expense	105	121
Deferred income taxes	23	17
Change in assets and liabilities:
Fiduciary receivables	(1,501)	(680)
Short term investments - funds held on behalf of clients	(519)	(742)
Fiduciary liabilities	2,020	1,422
Receivables, net	81	(18)
Accounts payable and accrued liabilities	(500)	(303)
Restructuring reserves	(38)	(54)
Current income taxes	48	122
Pension and other post employment liabilities	(200)	(146)
Other assets and liabilities	(73)	(131)
CASH PROVIDED BY OPERATING ACTIVITIES	269	419
CASH FLOWS FROM INVESTING ACTIVITIES
Sales of long-term investments	51	96
Purchases of long-term investments	(7)	(20)
Net sales of short-term investments - non-fiduciary	259	290
Acquisition of businesses, net of cash acquired	(82)	(95)
Proceeds from sale of businesses	1	8
Capital expenditures	(129)	(99)
CASH PROVIDED BY INVESTING ACTIVITIES	93	180
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	(350)	(653)
Issuance of shares for employee benefit plans	64	162
Issuance of debt	332	1,469
Repayment of debt	(305)	(1,504)
Cash dividends to shareholders	(102)	(100)
Purchase of shares from noncontrolling interests	1
Dividends paid to noncontrolling interests	(6)	(6)
CASH USED FOR FINANCING ACTIVITIES	(366)	(632)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	18	(13)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	14	(46)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	272	346
CASH AND CASH EQUIVALENTS AT END OF PERIOD	286	300
Supplemental disclosures:
Interest paid	132	150
Income taxes paid, net of refunds	$ 99	$ 14