v3.25.0.1
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Total Derivative Instruments (Details) - CAD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
TOTAL DERIVATIVE INSTRUMENTS    
Total net derivative asset/(liability) $ (2,250) $ (404)
Total net derivative instruments (2,250) (404)
Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Total net derivative asset/(liability) (2,251) (278)
Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Total net derivative asset/(liability) (4) (122)
Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Total net derivative asset/(liability) 5 (4)
Foreign exchange contracts    
TOTAL DERIVATIVE INSTRUMENTS    
Total net derivative asset/(liability) (2,175) (152)
Total net derivative instruments (2,175) (152)
Foreign exchange contracts | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Total net derivative asset/(liability) (2,180) (148)
Foreign exchange contracts | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Total net derivative asset/(liability) 0 $ 0
Derivative liability, statement of financial position [Extensible Enumeration]   Other long-term liabilities
Foreign exchange contracts | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Total net derivative asset/(liability) 5 $ (4)
Interest rate contracts    
TOTAL DERIVATIVE INSTRUMENTS    
Total net derivative asset/(liability) 53 (156)
Total net derivative instruments 53 $ (156)
Derivative liability, statement of financial position [Extensible Enumeration]   Other long-term liabilities
Interest rate contracts | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Total net derivative asset/(liability) 58 $ (52)
Derivative liability, statement of financial position [Extensible Enumeration]   Other long-term liabilities
Interest rate contracts | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Total net derivative asset/(liability) (5) $ (104)
Interest rate contracts | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Total net derivative asset/(liability) 0 $ 0
Derivative liability, statement of financial position [Extensible Enumeration]   Other long-term liabilities
Commodity contracts    
TOTAL DERIVATIVE INSTRUMENTS    
Total net derivative asset/(liability) (131) $ (96)
Total net derivative instruments (131) (96)
Commodity contracts | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Total net derivative asset/(liability) (132) (78)
Commodity contracts | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Total net derivative asset/(liability) 1 (18)
Commodity contracts | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Total net derivative asset/(liability) 0 0
Other contracts    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 3 1
Derivative liabilities, total gross derivative instruments as presented   (1)
Total net derivative asset/(liability) 3 0
Derivative assets, amounts available for offset 0 (1)
Derivative liabilities, amounts available for offset   1
Derivative assets, total net derivative instruments 3 0
Derivative liabilities, total net derivative instruments   0
Total net derivative instruments 3 0
Other contracts | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 3 1
Derivative liabilities, total gross derivative instruments as presented   (1)
Total net derivative asset/(liability) 3 0
Other contracts | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 0 0
Derivative liabilities, total gross derivative instruments as presented   0
Total net derivative asset/(liability) 0 0
Other contracts | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 0 0
Derivative liabilities, total gross derivative instruments as presented   0
Total net derivative asset/(liability) 0 0
Other current assets    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 557 623
Derivative assets, amounts available for offset (259) (335)
Derivative assets, total net derivative instruments $ 298 $ 288
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Other current assets Other current assets
Other current assets | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented $ 433 $ 551
Other current assets | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 46 31
Other current assets | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 78 41
Other current assets | Foreign exchange contracts    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 125 139
Derivative assets, amounts available for offset (29) (32)
Derivative assets, total net derivative instruments 96 107
Other current assets | Foreign exchange contracts | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 47 98
Other current assets | Foreign exchange contracts | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 0 0
Other current assets | Foreign exchange contracts | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 78 41
Other current assets | Interest rate contracts    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 67 65
Derivative assets, amounts available for offset (39) (32)
Derivative assets, total net derivative instruments 28 33
Other current assets | Interest rate contracts | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 23 34
Other current assets | Interest rate contracts | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 44 31
Other current assets | Interest rate contracts | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 0 0
Other current assets | Commodity contracts    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 362 418
Derivative assets, amounts available for offset (191) (270)
Derivative assets, total net derivative instruments 171 148
Other current assets | Commodity contracts | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 360 418
Other current assets | Commodity contracts | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 2 0
Other current assets | Commodity contracts | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 0 0
Deferred amounts and other assets    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 426 463
Derivative assets, amounts available for offset (137) (184)
Derivative assets, total net derivative instruments $ 289 $ 279
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Deferred amounts and other assets Deferred amounts and other assets
Deferred amounts and other assets | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented $ 417 $ 396
Deferred amounts and other assets | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 9 51
Deferred amounts and other assets | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 0 16
Deferred amounts and other assets | Foreign exchange contracts    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 83 335
Derivative assets, amounts available for offset (71) (122)
Derivative assets, total net derivative instruments 12 213
Deferred amounts and other assets | Foreign exchange contracts | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 83 319
Deferred amounts and other assets | Foreign exchange contracts | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 0 0
Deferred amounts and other assets | Foreign exchange contracts | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 0 16
Deferred amounts and other assets | Interest rate contracts    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 146 53
Derivative assets, amounts available for offset (27) (21)
Derivative assets, total net derivative instruments 119 32
Deferred amounts and other assets | Interest rate contracts | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 137 2
Deferred amounts and other assets | Interest rate contracts | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 9 51
Deferred amounts and other assets | Interest rate contracts | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 0 0
Deferred amounts and other assets | Commodity contracts    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 197 75
Derivative assets, amounts available for offset (39) (41)
Derivative assets, total net derivative instruments 158 34
Deferred amounts and other assets | Commodity contracts | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 197 75
Deferred amounts and other assets | Commodity contracts | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 0 0
Deferred amounts and other assets | Commodity contracts | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative assets, total gross derivative instruments as presented 0 0
Other current liabilities    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (1,335) (738)
Derivative liabilities, amounts available for offset 259 335
Derivative liabilities, total net derivative instruments $ (1,076) $ (403)
Derivative liability, statement of financial position [Extensible Enumeration] Other current liabilities Other current liabilities
Other current liabilities | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented $ (1,204) $ (500)
Other current liabilities | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (58) (194)
Other current liabilities | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (73) (44)
Other current liabilities | Foreign exchange contracts    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (804) (128)
Derivative liabilities, amounts available for offset 29 32
Derivative liabilities, total net derivative instruments (775) (96)
Other current liabilities | Foreign exchange contracts | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (731) (84)
Other current liabilities | Foreign exchange contracts | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented 0 0
Other current liabilities | Foreign exchange contracts | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (73) (44)
Other current liabilities | Interest rate contracts    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (80) (186)
Derivative liabilities, amounts available for offset 39 32
Derivative liabilities, total net derivative instruments (41) (154)
Other current liabilities | Interest rate contracts | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (22) (3)
Other current liabilities | Interest rate contracts | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (58) (183)
Other current liabilities | Interest rate contracts | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented 0 0
Other current liabilities | Commodity contracts    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (451) (423)
Derivative liabilities, amounts available for offset 191 270
Derivative liabilities, total net derivative instruments (260) (153)
Other current liabilities | Commodity contracts | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (451) (412)
Other current liabilities | Commodity contracts | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented 0 (11)
Other current liabilities | Commodity contracts | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented 0 0
Other long-term liabilities    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (1,898) (752)
Derivative liabilities, amounts available for offset 137 184
Derivative liabilities, total net derivative instruments $ (1,761) $ (568)
Derivative liability, statement of financial position [Extensible Enumeration] Other long-term liabilities Other long-term liabilities
Other long-term liabilities | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented $ (1,897) $ (725)
Other long-term liabilities | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (1) (10)
Other long-term liabilities | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented 0 (17)
Other long-term liabilities | Foreign exchange contracts    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (1,579) (498)
Derivative liabilities, amounts available for offset 71 122
Derivative liabilities, total net derivative instruments (1,508) (376)
Other long-term liabilities | Foreign exchange contracts | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (1,579) (481)
Other long-term liabilities | Foreign exchange contracts | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented 0 0
Other long-term liabilities | Foreign exchange contracts | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented 0 (17)
Other long-term liabilities | Interest rate contracts    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (80) (88)
Derivative liabilities, amounts available for offset 27 21
Derivative liabilities, total net derivative instruments (53) (67)
Other long-term liabilities | Interest rate contracts | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (80) (85)
Other long-term liabilities | Interest rate contracts | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented 0 (3)
Other long-term liabilities | Interest rate contracts | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented 0 0
Other long-term liabilities | Commodity contracts    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (239) (166)
Derivative liabilities, amounts available for offset 39 41
Derivative liabilities, total net derivative instruments (200) (125)
Other long-term liabilities | Commodity contracts | Non-Qualifying Derivative Instruments    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (238) (159)
Other long-term liabilities | Commodity contracts | Cash flow hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented (1) (7)
Other long-term liabilities | Commodity contracts | Fair value hedges | Designated as hedging instrument    
TOTAL DERIVATIVE INSTRUMENTS    
Derivative liabilities, total gross derivative instruments as presented $ 0 $ 0