The amount of identifiable intangible assets recognized as of the acquisition date.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 12, 13, 14, 20, A107

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph i

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 55

-Paragraph 37

-URI http://asc.fasb.org/extlink&oid=6910123&loc=d3e2207-128464

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Acquisitions (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended		1 Months Ended		1 Months Ended			1 Months Ended
	Dec. 31, 2011 Y	Apr. 28, 2010	Apr. 30, 2010 Customer relationships [Member] Y	Apr. 28, 2010 Customer relationships [Member]	Apr. 30, 2010 Technology [Member] Y	Apr. 28, 2010 Technology [Member]	Apr. 28, 2010 BJ Services trade name [Member]	Apr. 30, 2010 Other Trade Names [Member] Y	Apr. 28, 2010 Other Trade Names [Member]	Apr. 28, 2010 In-process research and development [Member]
Fair value estimates for identifiable intangible assets and useful lives
Estimated Fair Value		$ 1,404		$ 428		$ 451	$ 360		$ 38	$ 127
Estimated Useful life, Minimum	2		3		5			5
Estimated Useful life, Maximum	20		16		15			12
Estimated Useful Life							Indefinite			Indefinite