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Schedule of interest rate risk management (Details)
$ in Millions
Jun. 30, 2022
USD ($)
Probable Scenario Twelve [Member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 $ 834
Probable Scenario Twelve [Member] | L I B O R 3 M [Member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 9
Probable Scenario Twelve [Member] | L i b o r6 m [member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 529
Probable Scenario Twelve [Member] | C d i [member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 138
Probable Scenario Twelve [Member] | T j l p [member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 69
Probable Scenario Twelve [Member] | I p c a [member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 89
Reasonably Possible Scenario [member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 985
Reasonably Possible Scenario [member] | L I B O R 3 M [Member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 11
Reasonably Possible Scenario [member] | L i b o r6 m [member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 603
Reasonably Possible Scenario [member] | C d i [member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 173
Reasonably Possible Scenario [member] | T j l p [member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 87
Reasonably Possible Scenario [member] | I p c a [member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 111
Remote Scenario [member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 1,133
Remote Scenario [member] | L I B O R 3 M [Member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 12
Remote Scenario [member] | L i b o r6 m [member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 677
Remote Scenario [member] | C d i [member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 207
Remote Scenario [member] | T j l p [member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 104
Remote Scenario [member] | I p c a [member]  
DisclosureRiskManagementLineItems [Line Items]  
Increase decrease through net exchange differences property plant and equipment1 $ 133