The maximum original maturity of investments to be considered cash equivalent.

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- Definition

The period that goodwill impairment assessments were performed.

+ References

No definition available.

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- Definition

The number of business segments into which the company's operations are divided.

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No definition available.

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- Definition

Standard contract period (in years) over which maintenance and support fee revenue is ratably recognized.

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No definition available.

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

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- Definition

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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- Definition

Purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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-Subparagraph g

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-Paragraph 11, 12

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Description of Company and Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			36 Months Ended
	Dec. 31, 2012 Division	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Division
Goodwill [Line Items]
Number of business segments	2			2
Goodwill impairment assessment period				3 years
Revenue Recognition [Abstract]
Standard contract period for revenue recognition of maintenance and support fees	1 year
Research and Development [Abstract]
Research and development costs	$ 460	$ 401	$ 366
Cash and Cash Equivalents [Abstract]
Cash equivalents, maximum maturity (in months)	3 months
Goodwill [Roll Forward]
Goodwill	1,776	1,315
Current year acquisitions	162	424
Purchase price adjustments for previous acquisitions	197	37
Goodwill	2,135	1,776	1,315	2,135
Minimum
Finite-lived intangible assets [Abstract]
Useful life of finite-lived intangible assets (in years)	3 years
Maximum
Finite-lived intangible assets [Abstract]
Useful life of finite-lived intangible assets (in years)	20 years
Completion and Production
Goodwill [Roll Forward]
Goodwill	1,215	767
Current year acquisitions	100	411
Purchase price adjustments for previous acquisitions	196	37
Goodwill	1,511	1,215		1,511
Drilling and Evaluation
Goodwill [Roll Forward]
Goodwill	561	548
Current year acquisitions	62	13
Purchase price adjustments for previous acquisitions	1	0
Goodwill	$ 624	$ 561		$ 624