CONSOLIDATED STATEMENT OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Cash flows from operating activities:
Net Income	$ 5,519		$ 5,007		$ 4,265
Income from discontinued operations	(51)		(277)		(12)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,500	[1]	3,274	[1]	2,757	[1]
Gain on investment in M-I SWACO					(1,270)
Earnings of companies carried at equity, less dividends received	(61)		(64)		(85)
Deferred income taxes	(76)		(26)		(130)
Stock-based compensation expense	335		272		198
Pension and other postretirement benefits expense	404		365		299
Other non-cash items	97		203		327
Pension and other postretirement benefits funding	(673)		(601)		(868)
Change in operating assets and liabilities:
Increase in receivables	(2,116)	[2]	(1,281)	[2]	(290)	[2]
Increase in inventories	(643)	[2]	(864)	[2]	(50)	[2]
(Increase) decrease in other current assets	(314)	[2]	(93)	[2]	133	[2]
Increase (decrease) in accounts payable and accrued liabilities	928	[2]	597	[2]	(75)	[2]
Increase (decrease) in estimated liability for taxes on income	127	[2]	(561)	[2]	476	[2]
Increase (decrease) in other liabilities	1	[2]	169	[2]	(89)	[2]
Other - net	(163)	[2]	(5)	[2]	(77)	[2]
NET CASH PROVIDED BY OPERATING ACTIVITIES	6,814		6,115		5,509
Cash flows from investing activities:
Capital expenditures	(4,695)		(4,008)		(2,912)
Multiclient seismic data capitalized	(351)		(289)		(326)
Cash acquired in acquisition of Smith International, Inc.					399
Acquisition of Geoservices, net of cash acquired					(889)
Other business acquisitions and investments, net of cash acquired	(845)		(186)		(212)
(Purchase) sale of investments, net	(1,228)		351		1,023
Other	(55)		230		(19)
NET CASH USED IN INVESTING ACTIVITIES	(7,174)		(3,902)		(2,936)
Cash flows from financing activities:
Dividends paid	(1,432)		(1,300)		(1,040)
Proceeds from employee stock purchase plan	247		208		179
Proceeds from exercise of stock options	163		230		222
Stock repurchase program	(972)		(2,998)		(1,717)
Proceeds from issuance of long-term debt	2,832		6,884		2,815
Repayment of long-term debt	(1,817)		(4,992)		(1,814)
Net increase (decrease) in short-term borrowings	621		(119)		(68)
Other	19		(613)		14
NET CASH USED IN FINANCING ACTIVITIES	(339)		(2,700)		(1,409)
Cash flow from discontinued operations - operating activities	(126)		55		(15)
Cash flow from discontinued operations - investing activities	1,012		376		(2)
Cash flow from discontinued operations	886		431		(17)
Net increase (decrease) in cash before translation effect	187		(56)		1,147
Translation effect on cash	13		(3)
Cash, beginning of year	1,705		1,764		617
Cash, end of year	$ 1,905		$ 1,705		$ 1,764

[1] Includes multiclient seismic data costs.

[2] Net of the effect of business acquisitions.