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Properties, Plants and Equipment (Details) - USD ($) $ in Millions | Jun. 30, 2016 | Dec. 31, 2015
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Properties, plants and equipment with the associated accumulated depreciation and amortization |  |
Gross PP&E | $ 31,310 | $ 30,310
Accum. D&A | 11,063 | 10,589
Net PP&E | 20,247 | 19,721
Midstream [Member] |  |
Properties, plants and equipment with the associated accumulated depreciation and amortization |  |
Gross PP&E | 7,651 | 6,978
Accum. D&A | 1,477 | 1,293
Net PP&E | 6,174 | 5,685
Refining [Member] |  |
Properties, plants and equipment with the associated accumulated depreciation and amortization |  |
Gross PP&E | 21,075 | 20,850
Accum. D&A | 8,256 | 8,046
Net PP&E | 12,819 | 12,804
Marketing and Specialties [Member] |  |
Properties, plants and equipment with the associated accumulated depreciation and amortization |  |
Gross PP&E | 1,455 | 1,422
Accum. D&A | 788 | 746
Net PP&E | 667 | 676
Corporate and Other [Member] |  |
Properties, plants and equipment with the associated accumulated depreciation and amortization |  |
Gross PP&E | 1,129 | 1,060
Accum. D&A | 542 | 504
Net PP&E | $ 587 | $ 556

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- 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) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -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 + Details
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- Definition 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 -Publisher FASB -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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 7 + Details
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