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Basis of Preparation of the Consolidated Financial Statements - Detailed Information About Property, Plant and Equipment (Detail) | 12 Months Ended
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Dec. 31, 2017
Buildings and other constructions [Member] |
Disclosure of assets and liabilities with significant risk of material adjustment [line items] |
Estimated useful life of the assets | 50 Years
Furniture Fixture and Installations [member] |
Disclosure of assets and liabilities with significant risk of material adjustment [line items] |
Estimated useful life of the assets | 10 Years
Selling equipment [member] |
Disclosure of assets and liabilities with significant risk of material adjustment [line items] |
Estimated useful life of the assets | 10 Years
Other Property [member] |
Disclosure of assets and liabilities with significant risk of material adjustment [line items] |
Estimated useful life of the assets | 10 Years
Bottom of range [member] | Refinery equipment and petrochemical plants [member] |
Disclosure of assets and liabilities with significant risk of material adjustment [line items] |
Estimated useful life of the assets | 20 Years
Bottom of range [member] | Infrastructure for Natural Gas Distribution [member] |
Disclosure of assets and liabilities with significant risk of material adjustment [line items] |
Estimated useful life of the assets | 20 Years
Bottom of range [member] | Transportation equipment [member] |
Disclosure of assets and liabilities with significant risk of material adjustment [line items] |
Estimated useful life of the assets | 5 Years
Bottom of range [member] | Electric Power Generation Facilities [member] |
Disclosure of assets and liabilities with significant risk of material adjustment [line items] |
Estimated useful life of the assets | 15 Years
Top of range [member] | Refinery equipment and petrochemical plants [member] |
Disclosure of assets and liabilities with significant risk of material adjustment [line items] |
Estimated useful life of the assets | 25 Years
Top of range [member] | Infrastructure for Natural Gas Distribution [member] |
Disclosure of assets and liabilities with significant risk of material adjustment [line items] |
Estimated useful life of the assets | 50 Years
Top of range [member] | Transportation equipment [member] |
Disclosure of assets and liabilities with significant risk of material adjustment [line items] |
Estimated useful life of the assets | 25 Years
Top of range [member] | Electric Power Generation Facilities [member] |
Disclosure of assets and liabilities with significant risk of material adjustment [line items] |
Estimated useful life of the assets | 20 Years

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The useful lives or depreciation rates used for property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_c&doctype=Standard -URIDate 2017-03-09 + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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