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Schedule of pension plan assets (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
DisclosureEmployeeBenefitsLineItems [Line Items]    
Closing Balance $ 8,861  
Employee benefits [member]    
DisclosureEmployeeBenefitsLineItems [Line Items]    
Effects in the statement of income 4 $ (8)
Enrollments 4 26
Revision of provisions (34)
Effects in cash and cash equivalents (155) (123)
Terminations in the period (155) (123)
Cumulative translation adjustment 26 25
Closing Balance 224 794
Current 123 685
Non-current $ 101 $ 109