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Other expense (Tables)
 12 Months Ended
Dec. 31, 2023
Other Income and Expenses [Abstract]  
Other expense
For the year ended December 31 (in millions of Canadian dollars)202320222021
Foreign exchange gain on debt and lease liabilities$— $— $(7)
Foreign exchange loss on FX forward contracts (Note 18)
39 — — 
Other foreign exchange gains(12)— (4)
Acquisition-related costs (Note 11)
6 — 247 
Other19 17 1 
Other expense$52 $17 $237