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RELATED PARTY TRANSACTIONS (Details)
shares in Millions
 12 Months Ended
Mar. 30, 2020
USD ($)
agreement
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Jul. 29, 2020
USD ($)
shares
Disclosure of transactions between related parties [line items]          
Asset management fee as percent per quarter   0.3125%      
Asset management fee, percent   1.25%      
Credit facility, maximum borrowing capacity   $ 1,000,000,000      
Due from Brookfield Infrastructure   1,093,000,000 $ 0    
Repayment from Brookfield Infrastructure   15,000,000 0 $ 0  
Partnership units exchange requests   1,000,000      
Repayment of borrowings   887,000,000      
Exchangeable shares Issued, for settlement of payable   547,000,000      
Equivalent demand loan payable, related party   260,000,000      
Interest expense, related party transactions   32,000,000 39,000,000    
Amounts payable, related party transactions   5,000,000 2,000,000    
Amounts receivable, related party transactions   20,000,000 7,000,000    
Secondary offering, shares issued (in shares) | shares         5.0
Secondary offering, proceeds         $ 305,000,000
Percentage of issued and outstanding exchangeable shares held by Brookfield 29.60%        
Senior Unsecured Revolving Credit Facility          
Disclosure of transactions between related parties [line items]          
Number of credit agreements | agreement 2        
Borrowings maturity, term 10 years        
Credit facility, maximum borrowing capacity $ 1,000,000,000        
Subsidiary and corporate borrowings   0 0    
Brookfield Infrastructure          
Disclosure of transactions between related parties [line items]          
Demand deposit receivable, related party   $ 1,114,000,000      
Amounts payable, related party transactions, interest rate   0.20%      
Repayment of borrowings   $ 129,000,000      
Service Provider          
Disclosure of transactions between related parties [line items]          
Asset management fee as percent per quarter   0.3125%      
Asset management fee, percent   1.25%      
Services received, related party transactions   $ 45,000,000 30,000,000 30,000,000  
Subsidiary of Common Parent (Brookfield) | Brookfield Office Properties Inc.          
Disclosure of transactions between related parties [line items]          
Services received, related party transactions   0 0 0  
Revenue from rendering of services, related party transactions   $ 1,000,000 $ 1,000,000 $ 2,000,000