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FINANCIAL RISK MANAGEMENT - Additional Information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Apr. 14, 2020
Disclosure of detailed information about borrowings [line items]      
Debt in breach of asset-level financial covenants $ 145,000,000    
Credit facility, maximum borrowing capacity 1,131,000,000    
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Financial assets 5,400,000,000 $ 4,305,000,000  
Market risk      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Impact of 10% change in value of investments on equity 58,000,000    
Impact of 10 percent change in value of investments on profit loss 58,000,000    
Marketable securities | Market risk      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Financial assets 588,000,000 526,000,000  
Corporate revolving credit facility      
Disclosure of detailed information about borrowings [line items]      
Credit facility, maximum borrowing capacity 1,975,000,000    
Non-recourse borrowings 0 1,131,000,000  
Letter of credit outstanding amount 12,000,000 63,000,000  
Credit facility      
Disclosure of detailed information about borrowings [line items]      
Credit facility, maximum borrowing capacity 500,000,000    
Non-recourse borrowings 0 $ 0  
Syndicated Revolving Credit Facility      
Disclosure of detailed information about borrowings [line items]      
Credit facility, maximum borrowing capacity $ 1,000,000,000   $ 1,000,000,000