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Investment and other income
3 Months Ended
Mar. 31, 2023
Other Income and Expenses [Abstract]  
Investment and other income Investment and other income
Investment and other income included gains and losses on asset sales as follows:
           Three Months
           to March 31
millions of Canadian dollars2023 2022 
Proceeds from asset sales14 24 
Book value of asset sales5 
Gain (loss) on asset sales, before tax9 20 
Gain (loss) on asset sales, after tax8 16