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FINANCIAL RISK MANAGEMENT - Sensitivity Analysis for Foreign Currency Risk (Details) - Foreign currency risk - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Australian dollars      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Pre-tax income attributable to unitholders, 10% decrease $ (4) $ 14 $ 0
Pre-tax income attributable to unitholders, 10% increase 4 (14) 0
OCI attributable to unitholders, before taxes, 10% decrease (41) (33) (84)
OCI attributable to unitholders, before taxes, 10% increase 41 33 84
Canadian dollars      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Pre-tax income attributable to unitholders, 10% decrease (3) (9) (10)
Pre-tax income attributable to unitholders, 10% increase 3 9 10
OCI attributable to unitholders, before taxes, 10% decrease (86) (5) (115)
OCI attributable to unitholders, before taxes, 10% increase 86 5 115
Brazilian real      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Pre-tax income attributable to unitholders, 10% decrease (40) (6) 1
Pre-tax income attributable to unitholders, 10% increase 40 6 (1)
OCI attributable to unitholders, before taxes, 10% decrease (59) (37) (23)
OCI attributable to unitholders, before taxes, 10% increase 59 37 23
Euros      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Pre-tax income attributable to unitholders, 10% decrease 92 72 19
Pre-tax income attributable to unitholders, 10% increase (92) (72) (19)
OCI attributable to unitholders, before taxes, 10% decrease (89) (89) (109)
OCI attributable to unitholders, before taxes, 10% increase 89 89 109
Other      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Pre-tax income attributable to unitholders, 10% decrease (64) (187) (59)
Pre-tax income attributable to unitholders, 10% increase 64 187 59
OCI attributable to unitholders, before taxes, 10% decrease (136) (122) (111)
OCI attributable to unitholders, before taxes, 10% increase $ 136 $ 122 $ 111