Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 524	$ 503
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation of fixed assets	118	112
Amortization of intangible assets	198	208
Share-based compensation expense	137	105
Deferred income taxes	24	23
Change in assets and liabilities:
Fiduciary receivables	(654)	(1,501)
Short term investments - funds held on behalf of clients	(212)	(519)
Fiduciary liabilities	866	2,020
Receivables, net	191	81
Accounts payable and accrued liabilities	(431)	(500)
Restructuring reserves	(5)	(38)
Current income taxes	(110)	48
Pension, other post-retirement and other post-employment liabilities	(291)	(200)
Other assets and liabilities	32	(73)
CASH PROVIDED BY OPERATING ACTIVITIES	387	269
CASH FLOWS FROM INVESTING ACTIVITIES
Sales of long-term investments	23	51
Purchases of long-term investments	(6)	(7)
Net sales of short-term investments - non-fiduciary	29	259
Acquisition of businesses, net of cash acquired	(23)	(82)
Proceeds from sale of businesses	1	1
Capital expenditures	(122)	(129)
CASH (USED FOR) PROVIDED BY INVESTING ACTIVITIES	(98)	93
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	(525)	(350)
Issuance of shares for employee benefit plans	57	64
Issuance of debt	2,914	332
Repayment of debt	(2,607)	(305)
Cash dividends to shareholders	(105)	(102)
Purchase of shares from noncontrolling interests	0	1
Dividends paid to noncontrolling interests	(6)	(6)
CASH USED FOR FINANCING ACTIVITIES	(272)	(366)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(42)	18
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(25)	14
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	291	272
CASH AND CASH EQUIVALENTS AT END OF PERIOD	266	286
Supplemental disclosures:
Interest paid	121	132
Income taxes paid, net of refunds	$ 237	$ 99