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Operating Segments and Geographic Data (Details 1) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Segment Assets
Segment Assets	$ 255,160	$ 260,078
Goodwill	4,531	4,581
United States
Segment Assets
Segment Assets	67,122	69,712
International
Segment Assets
Segment Assets	183,507	185,785
Operating Segments
Segment Assets
Segment Assets	245,161	249,325
Operating Segments | Upstream
Segment Assets
Segment Assets	205,907	211,245
Goodwill	4,531	4,581
Operating Segments | Upstream | United States
Segment Assets
Segment Assets	40,318	42,596
Operating Segments | Upstream | International
Segment Assets
Segment Assets	161,058	164,068
Operating Segments | Downstream
Segment Assets
Segment Assets	39,254	38,080
Operating Segments | Downstream | United States
Segment Assets
Segment Assets	22,635	22,264
Operating Segments | Downstream | International
Segment Assets
Segment Assets	16,619	15,816
All Other
Segment Assets
Segment Assets	9,999	10,753
All Other | United States
Segment Assets
Segment Assets	4,169	4,852
All Other | International
Segment Assets
Segment Assets	$ 5,830	$ 5,901

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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-Name Accounting Standards Codification
-Topic 942
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-Section S99
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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
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-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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-Name Accounting Standards Codification
-Topic 350
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