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Schedule of impairment losses reversals (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
DisclosureImpairmentLineItems [Line Items]        
Impairment loss (reversal of impairment loss) recognised in profit or loss $ (168) $ (90) $ (167) $ (180)
Impairment loss reversal of impairment loss recognised in profit or loss net (170) 335 (177) 219
Property, plant and equipment [member]        
DisclosureImpairmentLineItems [Line Items]        
Impairment loss (reversal of impairment loss) recognised in profit or loss (84) (11) (83) (106)
Intangible assets other than goodwill [member]        
DisclosureImpairmentLineItems [Line Items]        
Impairment loss (reversal of impairment loss) recognised in profit or loss     (1)  
Non-current assets or disposal groups classified as held for sale [member]        
DisclosureImpairmentLineItems [Line Items]        
Impairment loss (reversal of impairment loss) recognised in profit or loss (84) (79) (83) (74)
Investments accounted for using equity method [member]        
DisclosureImpairmentLineItems [Line Items]        
Impairment loss recognised in profit or loss, investment property (2) 425 (10) 399
Losses [member]        
DisclosureImpairmentLineItems [Line Items]        
Impairment loss recognised in profit or loss, investment property (208) (156) (218) (312)
Reversals [member]        
DisclosureImpairmentLineItems [Line Items]        
Impairment loss recognised in profit or loss, investment property $ 38 $ 491 $ 41 $ 531