Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating cash flows:
Net income before non-controlling interests	$ 354	$ 331
Adjustments to reconcile net income to cash used for operations:
Depreciation and amortization of fixed assets and capitalized software	66	67
Amortization of intangible assets	17	16
Provision for deferred income taxes	35	110
Gain on investments	(20)	(19)
Loss (gain) on disposition of assets	12
Stock option expense	11	7
Changes in assets and liabilities:
Net receivables	(101)	(172)
Other current assets	151	(73)
Other assets	(213)	(45)
Accounts payable and accrued liabilities	(136)	68
Accrued compensation and employee benefits	(702)	(627)
Accrued income taxes	17	(20)
Other liabilities	26	50
Effect of exchange rate changes	(20)	(69)
Net cash used for operations	(503)	(376)
Financing cash flows:
Proceeds from issuance of debt	248
Repayments of debt	(252)	(2)
Purchase of non-controlling interests		(13)
Shares withheld for taxes on vested units - treasury shares	(84)	(85)
Issuance of common stock	77	89
Contingent payments from acquisitions	(13)	0
Dividends paid	(121)	(117)
Net cash used for financing activities	(145)	(128)
Investing cash flows:
Capital expenditures	(51)	(67)
Net sales of long-term investments	(5)
Proceeds from sales of fixed assets	1	1
Dispositions		1
Acquisitions	(60)	(104)
Other, net	(1)	1
Net cash used for investing activities	(116)	(168)
Effect of exchange rate changes on cash and cash equivalents	61	108
Decrease in cash and cash equivalents	(703)	(564)
Cash and cash equivalents at beginning of period	2,113	1,894
Cash and cash equivalents at end of period	$ 1,410	$ 1,330