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Schedule of interest in associates and joint ventures (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
IfrsStatementLineItems [Line Items]
Interests in associates		$ 98	$ 46
Interests in joint ventures		676	503
Interests in associates and joint ventures		774	549
Investments in joint ventures and associates		(4)	(2)
Compania De Inversione De Energia S A [Member]
IfrsStatementLineItems [Line Items]
Interests in joint ventures		347	240
Compania Inversora En Transmision Electrica Citelec S A [Member]
IfrsStatementLineItems [Line Items]
Interests in joint ventures		102	85
C T Barragan S A [Member]
IfrsStatementLineItems [Line Items]
Interests in joint ventures		227	178
Greenwind S A [Member]
IfrsStatementLineItems [Line Items]
Investments in joint ventures and associates	[1]	(4)	(2)
Refineria Del Norte S A [Member]
IfrsStatementLineItems [Line Items]
Interests in associates		22	19
Oleoducto De Crudos Pesados Ltd [Member]
IfrsStatementLineItems [Line Items]
Interests in associates		24	2
Transportadora De Gas Del Sur S A [Member]
IfrsStatementLineItems [Line Items]
Interests in associates		$ 52	$ 25
[1] The company receives financial assistance from partners.

X

- Definition

The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The amount of investments in associates in an entity's separate financial statements. [Refer: Associates [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The amount of investments in joint ventures in an entity's separate financial statements. [Refer: Joint ventures [member]]

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