Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating cash flows:
Net income before non-controlling interests	$ 1,015	$ 871	$ 241
Adjustments to reconcile net income to cash used for operations:
Goodwill impairment charge			315
Depreciation and amortization of fixed assets and capitalized software	267	291	307
Amortization of intangible assets	65	66	58
Charge for early extinguishment of debt	72
Provision for deferred income taxes	178	16	42
(Gain) loss on investments	(8)	(40)	8
Loss (gain) on disposition of assets	35	(17)	56
Stock option expense	21	18	11
Changes in assets and liabilities:
Net receivables	143	(216)	(81)
Other current assets	(225)	51	(28)
Other assets	(94)	(216)	118
Accounts payable and accrued liabilities	108	(55)	124
Accrued compensation and employee benefits	107	(13)	92
Accrued income taxes	1	32	(95)
Other liabilities	32	(145)	(487)
Effect of exchange rate changes	(12)	79	(41)
Net cash provided by operations	1,705	722	640
Financing cash flows:
Purchase of treasury shares	(361)	(86)
Proceeds from issuance of debt	496		398
Repayments of debt	(11)	(559)	(408)
Payments for early extinguishment of debt	(672)
Purchase of non-controlling interests	(21)	(15)	(24)
Shares withheld for taxes on vested units - treasury shares	(93)	(59)	(33)
Issuance of common stock	162	41	34
Contingent payments for acquisitions	(16)
Distributions to non-controlling interests	(11)
Dividends paid	(480)	(452)	(431)
Net cash used for financing activities	(1,007)	(1,130)	(464)
Investing cash flows:
Capital expenditures	(280)	(271)	(305)
Net sales of long-term investments	62	91	53
Proceeds from sales of fixed assets	3	6	7
Dispositions		1,202	75
Acquisitions	(237)	(492)	(73)
Other, net	(5)	(1)	7
Net cash (used for) provided by investing activities	(457)	535	(236)
Effect of exchange rate changes on cash and cash equivalents	(22)	(10)	152
Decrease in cash and cash equivalents	219	117	92
Cash and cash equivalents at beginning of period	1,894	1,777	1,685
Cash and cash equivalents at end of period	2,113	1,894	1,777
Cash and cash equivalents—reported as discontinued operations	0	0	70
Cash and cash equivalents—continuing operations	$ 2,113	$ 1,894	$ 1,707