Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 249	$ 255
Adjustments to reconcile net income to cash (used for) provided by operating activities:
Depreciation of fixed assets	55	53
Amortization of intangible assets	104	91
Stock compensation expense	55	74
Deferred income taxes	16	11
Change in assets and liabilities:
Fiduciary receivables	(644)	181
Short-term investments - funds held on behalf of clients	(62)	(427)
Fiduciary liabilities	706	246
Receivables, net	61	108
Accounts payable and accrued liabilities	(451)	(327)
Restructuring reserves	(16)	(28)
Current income taxes	41	58
Pension and other post employment liabilities	(110)	(81)
Other assets and liabilities	(19)	(59)
CASH (USED FOR) PROVIDED BY OPERATING ACTIVITIES	(15)	155
CASH FLOWS FROM INVESTING ACTIVITIES
Sales of long-term investments	36	17
Purchase of long-term investments	(3)	(6)
Net sales of short-term investments - non-fiduciary	283	218
Acquisition of businesses, net of cash acquired	(23)	(3)
Capital expenditures	(71)	(56)
CASH PROVIDED BY INVESTING ACTIVITIES	222	170
CASH FLOWS FROM FINANCING ACTIVITIES
Purchase of treasury stock	(100)	(350)
Issuance of stock for employee benefit plans	49	85
Issuance of debt	75	429
Repayment of debt	(140)	(79)
Cash dividends to stockholders	(49)	(51)
Dividends paid to noncontrolling interests	(1)
CASH (USED FOR) PROVIDED BY FINANCING ACTIVITIES	(166)	34
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	10	(23)
NET INCREASE IN CASH AND CASH EQUIVALENTS	51	336
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	272	346
CASH AND CASH EQUIVALENTS AT END OF PERIOD	323	682
Supplemental disclosures:
Interest paid	75	76
Income taxes paid, net of refunds	$ 40	$ 36