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FINANCIAL RISK MANAGEMENT - Additional Information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure of detailed information about borrowings [line items]    
Credit facility, maximum borrowing capacity $ 458,000,000  
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 10,596,000,000 $ 10,058,000,000
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 42,000,000  
Impact of 10 percent change in value of investments on profit loss 40,000,000  
Marketable securities | Market risk    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 422,000,000 809,000,000
Senior Unsecured Revolving Credit Facility    
Disclosure of detailed information about borrowings [line items]    
Credit facility, maximum borrowing capacity 2,200,000,000 2,200,000,000
Non-recourse borrowings   222,000,000
Letter of credit outstanding amount 10,000,000 8,000,000
Credit facility    
Disclosure of detailed information about borrowings [line items]    
Credit facility, maximum borrowing capacity 1,000,000,000 1,000,000,000
Non-recourse borrowings $ 0 $ 0