Net Interest Expense (Tables)

12 Months Ended

Dec. 31, 2018

Interest Income (Expense), Net [Abstract]

Net Interest Expense

(in millions of Canadian dollars)	2018			2017			2016
Interest cost	$	475		$	491		$	497
Interest capitalized to Properties	(20		)	(16		)	(25		)
Interest expense	455			475			472
Interest income	(2		)	(2		)	(1		)
Net interest expense	$	453		$	473		$	471