v3.26.1
PREFERRED LIMITED PARTNERS' EQUITY - Schedule of Preferred Limited Partners' Equity (Details)
$ in Millions, $ in Millions
6 Months Ended
Jun. 30, 2026
USD ($)
shares
Jun. 30, 2025
USD ($)
Jun. 30, 2026
CAD ($)
shares
Dec. 31, 2025
USD ($)
Disclosure of classes of share capital [line items]        
Preferred limited partners' equity $ 647     $ 634
Preferred limited partners' equity        
Disclosure of classes of share capital [line items]        
Number of shares outstanding (in shares) | shares 32,000,000.00   32,000,000.00  
Dividends declared for the year ended $ 15 $ 17    
Preferred limited partners' equity $ 647     634
Series 7 (C$175)        
Disclosure of classes of share capital [line items]        
Carrying value     $ 175  
Number of shares outstanding (in shares) | shares 0   0  
Cumulative distribution rate (%) 0.00%      
Earliest permitted redemption date January 2026      
Dividends declared for the year ended $ 0 3    
Preferred limited partners' equity $ 0     128
Series 13 (C$250)        
Disclosure of classes of share capital [line items]        
Carrying value     $ 250  
Number of shares outstanding (in shares) | shares 10,000,000.00   10,000,000.00  
Cumulative distribution rate (%) 6.05%      
Earliest permitted redemption date April 2028      
Dividends declared for the year ended $ 5 5    
Preferred limited partners' equity 196     196
Series 17 ($200)        
Disclosure of classes of share capital [line items]        
Carrying value $ 200      
Number of shares outstanding (in shares) | shares 8,000,000.00   8,000,000.00  
Cumulative distribution rate (%) 5.25%      
Earliest permitted redemption date March 2025      
Dividends declared for the year ended $ 5 5    
Preferred limited partners' equity $ 195     195
Series 18 (C$150)        
Disclosure of classes of share capital [line items]        
Carrying value     $ 150  
Number of shares outstanding (in shares) | shares 6,000,000.00   6,000,000.00  
Cumulative distribution rate (%) 5.50%      
Earliest permitted redemption date April 2027      
Dividends declared for the year ended $ 4 4    
Preferred limited partners' equity $ 115     115
Series 19 (C$200)        
Disclosure of classes of share capital [line items]        
Carrying value     $ 200  
Number of shares outstanding (in shares) | shares 8,000,000   8,000,000  
Cumulative distribution rate (%) 5.75%      
Earliest permitted redemption date July 2031      
Dividends declared for the year ended $ 1 $ 0    
Preferred limited partners' equity $ 141     $ 0