Financial risk management (Details 8) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024
Notes and other explanatory information [abstract]
Beginning balance	$ (30,845)	$ (18,210)
Recognized in Other comprehensive income	8,304	(8,649)
Reclassified to the statement of income occurred exports	1,220	1,297
Other comprehensive income (loss)	9,524	(7,352)
Ending balance	$ (21,321)	$ (25,562)

The gains (losses) recognised in other comprehensive income on cash flow hedges, net of tax, before reclassification adjustments. [Refer: Cash flow hedges [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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