The revised net fair value of trade names acquired in a business combination.

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The net amount after taxes related to impairment loss recognized in the period resulting from the write-down of the carrying amount of an indefinite-lived intangible asset, other than goodwill, to fair value.

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Aggregate amount of intangible asset amortization recognized as expense during the period.

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A description of the remaining amortization period of a major finite-lived intangible asset class.

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The maximum useful life of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company.

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The amount of amortization expense expected to be recognized during year five of the five succeeding fiscal years.

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The amount of amortization expense expected to be recognized during year one of the five succeeding fiscal years.

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Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

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Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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Goodwill and Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2011 Y	Dec. 31, 2010	Dec. 31, 2009
Changes in carrying amount of goodwill
Balance at December 31,2010		$ 5,869
Purchase price adjustments for previous acquisitions		85
Acquisitions		4
Other Adjustments		(2)
Balance at December 31, 2011	5,956	5,956	5,869
Goodwill and Intangible Assets (Textual) [Abstract]
Minimum estimated useful lives of intangible assets		2
Maximum estimated useful lives of intangible assets		20
Impairments of goodwill related to the annual impairment test		0
Impairment of trade names, net	220	220
Fair value of trade name	61
Amortization expense for intangible assets included in net income		96	76	31
Estimated amortization expense for the year 2012		135
Estimated amortization expense for the year 2013		113
Estimated amortization expense for the year 2014		98
Estimated amortization expense for the year 2015		90
Estimated amortization expense for the year 2016		89
Trade Name [Member]
Schedule Of Finite Lived Intangible Assets By Major Class [Line Items]
Remaining useful life after revaluation of BJ Services trade name	3 years
Industrial Services and Other [Member]
Changes in carrying amount of goodwill
Balance at December 31,2010		428
Purchase price adjustments for previous acquisitions		(11)
Balance at December 31, 2011	417	417
North America [Member]
Changes in carrying amount of goodwill
Balance at December 31,2010		2,731
Purchase price adjustments for previous acquisitions		337
Acquisitions		4
Other Adjustments		(3)
Balance at December 31, 2011	3,069	3,069
Latin America [Member]
Changes in carrying amount of goodwill
Balance at December 31,2010		879
Purchase price adjustments for previous acquisitions		(293)
Balance at December 31, 2011	586	586
Europe / Africa / Russia Caspian [Member]
Changes in carrying amount of goodwill
Balance at December 31,2010		936
Purchase price adjustments for previous acquisitions		90
Other Adjustments		1
Balance at December 31, 2011	1,027	1,027
Middle East / Asia Pacific [Member]
Changes in carrying amount of goodwill
Balance at December 31,2010		895
Purchase price adjustments for previous acquisitions		(38)
Balance at December 31, 2011	$ 857	$ 857