Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Operating cash flows:
Net income before non-controlling interests	$ 938	$ 755
Adjustments to reconcile net income to cash used for operations:
Depreciation and amortization of fixed assets and capitalized software	201	200
Amortization of intangible assets	53	50
Intangible asset impairment	8	0
Adjustments to acquisition related contingent consideration liability	(32)	0
Charge for early extinguishment of debt	0	72
Provision for deferred income taxes	18	91
Gain on investments	(19)	(12)
Loss on disposition of assets	13	1
Stock option expense	23	16
Changes in assets and liabilities:
Net receivables	(148)	122
Other current assets	19	(83)
Other assets	(204)	(184)
Accounts payable and accrued liabilities	(208)	90
Accrued compensation and employee benefits	(176)	(188)
Accrued income taxes	88	12
Other liabilities	201	93
Effect of exchange rate changes	(25)	(40)
Net cash used for operations	750	995
Financing cash flows:
Purchase of treasury shares	(180)	(361)
Proceeds from issuance of debt	248	496
Repayments of debt	(257)	(8)
Payments for early extinguishment of debt	0	(672)
Purchase of non-controlling interests		(21)
Shares withheld for taxes on vested units - treasury shares	(92)	(90)
Issuance of common stock	151	123
Payments of contingent consideration for acquisitions	(20)
Distributions of non-controlling interests	(5)
Dividends paid	(369)	(358)
Net cash used for financing activities	(524)	(891)
Investing cash flows:
Capital expenditures	(249)	(205)
Net sales of long-term investments	26	64
Proceeds from sales of fixed assets	4	4
Dispositions	2	1
Acquisitions	(153)	(134)
Other, net	1	(3)
Net cash used for investing activities	(369)	(273)
Effect of exchange rate changes on cash and cash equivalents	74	(11)
Decrease in cash and cash equivalents	(69)	(180)
Cash and cash equivalents at beginning of period	2,113	1,894
Cash and cash equivalents at end of period	$ 2,044	$ 1,714