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Right of Use Assets, Net - Summary of Right of Use Assets, Net (Detail) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of quantitative information about right-of-use assets [line items]    
Balance at beginning of period $ 2,010 $ 1,139
Balance at end of period 1,845 2,010
COST    
Disclosure of quantitative information about right-of-use assets [line items]    
Balance at beginning of period 2,656 1,502
Acquisition (Note 5)   1,132
Additions 25 110
Modifications 83 22
Re-measurements 7 (4)
Transfers to Assets Held for Sale (Note 18)   (78)
Exchange Rate Movements and Other (74) (28)
Terminations (10)  
Balance at end of period 2,687 2,656
ACCUMULATED DEPRECIATION    
Disclosure of quantitative information about right-of-use assets [line items]    
Balance at beginning of period 646 363
Transfers to Assets Held for Sale (Note 18)   (24)
Exchange Rate Movements and Other 95 24
Terminations (6) (3)
Depreciation 297 323
Impairment Reversals (Note 11)   11
Balance at end of period 842 646
Real Estate    
Disclosure of quantitative information about right-of-use assets [line items]    
Balance at beginning of period 500 437
Balance at end of period 472 500
Real Estate | COST    
Disclosure of quantitative information about right-of-use assets [line items]    
Balance at beginning of period 592 495
Acquisition (Note 5)   99
Additions 0 4
Modifications 9 1
Re-measurements 1 (2)
Transfers to Assets Held for Sale (Note 18)   0
Exchange Rate Movements and Other (2) (5)
Terminations (1)  
Balance at end of period 599 592
Real Estate | ACCUMULATED DEPRECIATION    
Disclosure of quantitative information about right-of-use assets [line items]    
Balance at beginning of period 92 58
Transfers to Assets Held for Sale (Note 18)   0
Exchange Rate Movements and Other 1 4
Terminations 0 0
Depreciation 36 38
Impairment Reversals (Note 11)   0
Balance at end of period 127 92
Transportation And Storage Assets    
Disclosure of quantitative information about right-of-use assets [line items]    
Balance at beginning of period 1,321 684
Balance at end of period 1,195 1,321
Transportation And Storage Assets | COST    
Disclosure of quantitative information about right-of-use assets [line items]    
Balance at beginning of period 1,841 977
Acquisition (Note 5)   765
Additions 22 96
Modifications 69 20
Re-measurements 3 1
Transfers to Assets Held for Sale (Note 18)   0
Exchange Rate Movements and Other (89) (18)
Terminations (6)  
Balance at end of period 1,840 1,841
Transportation And Storage Assets | ACCUMULATED DEPRECIATION    
Disclosure of quantitative information about right-of-use assets [line items]    
Balance at beginning of period 520 293
Transfers to Assets Held for Sale (Note 18)   0
Exchange Rate Movements and Other 95 14
Terminations (6) (3)
Depreciation 226 239
Impairment Reversals (Note 11)   5
Balance at end of period 645 520
Manufacturing Assets    
Disclosure of quantitative information about right-of-use assets [line items]    
Balance at beginning of period 128 10
Balance at end of period 116 128
Manufacturing Assets | COST    
Disclosure of quantitative information about right-of-use assets [line items]    
Balance at beginning of period 161 15
Acquisition (Note 5)   138
Additions 1 7
Modifications 3 1
Re-measurements 2 0
Transfers to Assets Held for Sale (Note 18)   0
Exchange Rate Movements and Other 9 0
Terminations (2)  
Balance at end of period 174 161
Manufacturing Assets | ACCUMULATED DEPRECIATION    
Disclosure of quantitative information about right-of-use assets [line items]    
Balance at beginning of period 33 5
Transfers to Assets Held for Sale (Note 18)   0
Exchange Rate Movements and Other (4) 0
Terminations 0 0
Depreciation 21 23
Impairment Reversals (Note 11)   5
Balance at end of period 58 33
Other Assets    
Disclosure of quantitative information about right-of-use assets [line items]    
Balance at beginning of period 61 8
Balance at end of period 62 61
Other Assets | COST    
Disclosure of quantitative information about right-of-use assets [line items]    
Balance at beginning of period 62 15
Acquisition (Note 5)   130
Additions 2 3
Modifications 2 0
Re-measurements 1 (3)
Transfers to Assets Held for Sale (Note 18)   (78)
Exchange Rate Movements and Other 8 (5)
Terminations (1)  
Balance at end of period 74 62
Other Assets | ACCUMULATED DEPRECIATION    
Disclosure of quantitative information about right-of-use assets [line items]    
Balance at beginning of period 1 7
Transfers to Assets Held for Sale (Note 18)   (24)
Exchange Rate Movements and Other 3 6
Terminations 0 0
Depreciation 14 23
Impairment Reversals (Note 11)   1
Balance at end of period $ 12 $ 1