Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

	Goodwill			Intangible assets
(in millions of Canadian dollars)	Net carrying amount			Cost		Accumulated amortization			Net carrying amount			Total goodwill and intangible assets
Balance at December 31, 2017	$	178		$	22	$	(13	)	$	9		$	187
Amortization	—			—		(1		)	(1		)	(1		)
Foreign exchange impact	16			—		—			—			16
Balance at December 31, 2018	194			22		(14		)	8			202
Additions (Note 11)	10			5		—			5			15
Amortization	—			—		(1		)	(1		)	(1		)
Foreign exchange impact	(10		)	—		—			—			(10		)
Balance at December 31, 2019	$	194		$	27	$	(15	)	$	12		$	206