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Impairments Impairments - Fixed Assets and Other Table (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Property, Plant and Equipment [Line Items]
Impairments of fixed assets and other	$ 751	$ 79	$ 795	$ 167
Other, Barnett Shale Exit Costs [Member]
Property, Plant and Equipment [Line Items]
Impairments of fixed assets and other	616	0	616	0
Exploration and Production Equipment [Member]
Property, Plant and Equipment [Line Items]
Impairments of fixed assets and other	96	0	96	0
Compressor [Member]
Property, Plant and Equipment [Line Items]
Impairments of fixed assets and other	32	0	52	21
Buildings and land [Member]
Property, Plant and Equipment [Line Items]
Impairments of fixed assets and other	7	0	14	0
Other [Member]
Property, Plant and Equipment [Line Items]
Impairments of fixed assets and other	$ 0	$ 79	$ 17	$ 146

X

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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