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SEGMENT INFORMATION - Geographic Information - Non-current assets (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Disclosure of geographical areas [line items]    
Non-current assets $ 69,065 $ 57,620
Canada    
Disclosure of geographical areas [line items]    
Non-current assets 23,324 10,057
United States    
Disclosure of geographical areas [line items]    
Non-current assets 12,382 13,372
India    
Disclosure of geographical areas [line items]    
Non-current assets 10,836 10,986
United Kingdom    
Disclosure of geographical areas [line items]    
Non-current assets 8,831 8,940
Brazil    
Disclosure of geographical areas [line items]    
Non-current assets 5,840 5,404
Australia    
Disclosure of geographical areas [line items]    
Non-current assets 3,688 4,042
Europe    
Disclosure of geographical areas [line items]    
Non-current assets 1,467 1,022
Peru    
Disclosure of geographical areas [line items]    
Non-current assets 1,132 1,247
Colombia    
Disclosure of geographical areas [line items]    
Non-current assets 1,061 1,256
Chile    
Disclosure of geographical areas [line items]    
Non-current assets 8 841
Other    
Disclosure of geographical areas [line items]    
Non-current assets $ 496 $ 453