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Employee benefits (Details 5)
$ in Millions
 12 Months Ended
Dec. 31, 2023
USD ($)
PPSP-R [member]  
IfrsStatementLineItems [Line Items]  
Deficit registered by Petros $ 330
Ordinary and extraordinary future contributions - sponsor 4,212
Contributions related to the TFC - sponsor 691
Financial assumptions (interest rate and inflation), changes in fair value of plan assets and actuarial valuation method (1,343)
Net actuarial liability recorded by the Company 3,890
PPSP-NR [member]  
IfrsStatementLineItems [Line Items]  
Deficit registered by Petros 341
Ordinary and extraordinary future contributions - sponsor 1,079
Contributions related to the TFC - sponsor 391
Financial assumptions (interest rate and inflation), changes in fair value of plan assets and actuarial valuation method (431)
Net actuarial liability recorded by the Company $ 1,380