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ORGANIZATION AND DESCRIPTION OF OUR BUSINESS - Narrative (Details)
Mar. 30, 2020
USD ($)
agreement
$ / shares
shares
Dec. 31, 2020
USD ($)
Jul. 29, 2020
Disclosure of corporate information [line items]      
Class A shares to limited partner units, conversion ratio | shares 0.11111    
Exchangeable shares issued as a result of the Holding LP Distribution, Brookfield (in shares) | shares 13,700,000    
Exchangeable shares issued as a result of the Holding LP Distribution, Partnership (in shares) | shares 32,600,000    
Percentage of issued and outstanding exchangeable shares held by holders of units 70.40%    
Percentage of issued and outstanding exchangeable shares held by Brookfield 29.60%   19.30%
Percentage of voting interest in company 82.40%    
Credit facility, maximum borrowing capacity   $ 1,000,000,000  
Equity commitment from parent $ 1,000,000,000    
Class C exchangeable shares, conversion ratio (in shares) | shares 1    
Exchangeable shares listing term 5 years    
Preferred shares (in dollars per share) | $ / shares $ 25.00    
Subsidiaries      
Disclosure of corporate information [line items]      
Percentage of voting interest in company 75.00%    
Holders of exchangeable shares      
Disclosure of corporate information [line items]      
Percentage of voting interest in company 25.00%    
Brookfield Infrastructure Partners L.P      
Disclosure of corporate information [line items]      
Percentage of voting interest in company 7.40%    
Holders of exchangeable shares, excluding Parent      
Disclosure of corporate information [line items]      
Percentage of voting interest in company 17.60%    
Senior Unsecured Revolving Credit Facility      
Disclosure of corporate information [line items]      
Number of credit agreements | agreement 2    
Borrowings maturity, term 10 years    
Credit facility, maximum borrowing capacity $ 1,000,000,000    
Senior Unsecured Revolving Credit Facility | Subsidiaries      
Disclosure of corporate information [line items]      
Credit facility, maximum borrowing capacity 1,000,000,000    
Senior Unsecured Revolving Credit Facility | Brookfield Infrastructure Partners L.P      
Disclosure of corporate information [line items]      
Credit facility, maximum borrowing capacity $ 1,000,000,000