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Properties, Plants and Equipment (Summary of Investment in Property, Plant, and Equipment) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Properties, plants and equipment with the associated accumulated depreciation and amortization
Gross PP&E	$ 31,989	$ 30,310
Accum. D&A	11,134	10,589
Net PP&E	20,855	19,721
Midstream
Properties, plants and equipment with the associated accumulated depreciation and amortization
Gross PP&E	8,179	6,978
Accum. D&A	1,579	1,293
Net PP&E	6,600	5,685
Chemicals
Properties, plants and equipment with the associated accumulated depreciation and amortization
Gross PP&E	0	0
Accum. D&A	0	0
Net PP&E	0	0
Refining
Properties, plants and equipment with the associated accumulated depreciation and amortization
Gross PP&E	21,152	20,850
Accum. D&A	8,197	8,046
Net PP&E	12,955	12,804
Marketing and Specialties
Properties, plants and equipment with the associated accumulated depreciation and amortization
Gross PP&E	1,451	1,422
Accum. D&A	776	746
Net PP&E	675	676
Corporate and Other
Properties, plants and equipment with the associated accumulated depreciation and amortization
Gross PP&E	1,207	1,060
Accum. D&A	582	504
Net PP&E	$ 625	$ 556

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.14)
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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(13))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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-Subparagraph (SX 210.7-03(a)(8))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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