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Properties, Plants and Equipment (Schedule of Property Plant And Equipment) (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Gross PP&E	$ 39,137	$ 38,071
Accum. D&A	14,855	14,285
Net PP&E	24,282	23,786
Corporate and Other
Property, Plant and Equipment [Line Items]
Gross PP&E	1,401	1,311
Accum. D&A	637	599
Net PP&E	764	712
Midstream
Property, Plant and Equipment [Line Items]
Gross PP&E	11,931	11,221
Accum. D&A	2,543	2,391
Net PP&E	9,388	8,830
Chemicals
Property, Plant and Equipment [Line Items]
Gross PP&E	0	0
Accum. D&A	0	0
Net PP&E	0	0
Refining
Property, Plant and Equipment [Line Items]
Gross PP&E	24,110	23,692
Accum. D&A	10,730	10,336
Net PP&E	13,380	13,356
Marketing and Specialties (M&S)
Property, Plant and Equipment [Line Items]
Gross PP&E	1,695	1,847
Accum. D&A	945	959
Net PP&E	$ 750	$ 888

X

- Definition

Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
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- Definition

Amount, after accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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- Definition

Amount, before accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-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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