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Information by operating segment (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022
IfrsStatementLineItems [Line Items]
Net income (loss) of the period disclosed in Apr-Jun/2022	$ 11,041	$ 19,689
Changes in the measurement
Net income (loss) of the period reclassified - Apr-Jun/2022	11,041	19,689
Operating segments [member] | Exploration And Production [Member]
IfrsStatementLineItems [Line Items]
Net income (loss) of the period disclosed in Apr-Jun/2022	10,802	18,756
Changes in the measurement	(2)	(1)
Net income (loss) of the period reclassified - Apr-Jun/2022	10,800	18,755
Operating segments [member] | Refining Transportation And Marketing [Member]
IfrsStatementLineItems [Line Items]
Net income (loss) of the period disclosed in Apr-Jun/2022	2,761	4,748
Changes in the measurement	(129)	(178)
Net income (loss) of the period reclassified - Apr-Jun/2022	2,632	4,570
Operating segments [member] | Gas And Power [Member]
IfrsStatementLineItems [Line Items]
Net income (loss) of the period disclosed in Apr-Jun/2022	394	153
Changes in the measurement	6	9
Net income (loss) of the period reclassified - Apr-Jun/2022	400	162
Operating segments [member] | Corporate And Other Business [Member]
IfrsStatementLineItems [Line Items]
Net income (loss) of the period disclosed in Apr-Jun/2022	(2,360)	(2,607)
Changes in the measurement	125	170
Net income (loss) of the period reclassified - Apr-Jun/2022	(2,235)	(2,437)
Operating segments [member] | Eliminations [Member]
IfrsStatementLineItems [Line Items]
Net income (loss) of the period disclosed in Apr-Jun/2022	(556)	(1,361)
Changes in the measurement
Net income (loss) of the period reclassified - Apr-Jun/2022	$ (556)	$ (1,361)

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The amount of other comprehensive income, before tax, resulting from actuarial gains (losses) arising from changes in demographic assumptions that result in remeasurements of the net defined benefit liability (asset). Demographic assumptions deal with matters such as: (a) mortality; (b) rates of employee turnover, disability and early retirement; (c) the proportion of plan members with dependants who will be eligible for benefits; (d) the proportion of plan members who will select each form of payment option available under the plan terms; and (e) claim rates under medical plans. [Refer: Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans] [Contrast: Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions]

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2023-01-01
-Paragraph 135
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_135_b&doctype=Standard
-URIDate 2023-03-23

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