Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Fair Value and Carrying Value of Long-term Debt

The carrying values of financial instruments equal or approximate their fair values with the exception of long-term debt:

(in millions of Canadian dollars)	December 31, 2019		December 31, 2018
Long-term debt (including current maturities):
Fair value	$	10,149	$	9,639
Carrying value	8,757		8,696