Consolidated Statements of Changes in Equity (USD $) In Millions, unless otherwise specified	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Beginning Balance at Dec. 31, 2008	$ 6,807	$ 309	$ 745	$ 6,276	$ (523)	$ 0
Comprehensive income:
Net income	421			421
Foreign currency translation adjustments					122
Defined benefit pension plans, net of tax of $2, $(5) and $44 for the year 2009, 2010 and 2011 respectively					(13)
Total comprehensive income	530
Issuance of common stock	44	3	41
Stock-based compensation cost	88		88
Cash dividends ($0.60 per share)	(185)			(185)
Balance at Dec. 31, 2009	7,284	312	874	6,512	(414)
Comprehensive income:
Net income	819			812		7
Foreign currency translation adjustments	(41)				(41)
Defined benefit pension plans, net of tax of $2, $(5) and $44 for the year 2009, 2010 and 2011 respectively					35
Total comprehensive income	813
Issuance of common stock, to acquire BJ Services	6,104	118	5,986
Issuance of common stock	60	2	58
Stock-based compensation cost	87		87
Cash dividends ($0.60 per share)	(241)			(241)
Acquisition of noncontrolling interests	179					179
Balance at Dec. 31, 2010	14,286	432	7,005	7,083	(420)	186
Comprehensive income:
Net income	1,743			1,739		4
Foreign currency translation adjustments	(43)				(43)	(1)
Defined benefit pension plans, net of tax of $2, $(5) and $44 for the year 2009, 2010 and 2011 respectively					(92)
Total comprehensive income	1,607
Issuance of common stock	184	5	179
Stock-based compensation cost	108		108
Cash dividends ($0.60 per share)	(261)			(261)
Net activity related to noncontrolling interests	40		11			29
Balance at Dec. 31, 2011	$ 15,964	$ 437	$ 7,303	$ 8,561	$ (555)	$ 218