Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2020

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, 2018	$	194	$	22	$	(14)	$	8	$	202
Additions (Note 10)	10		5		—		5		15
Amortization	—		—		(1)		(1)		(1)
Foreign exchange impact	(10)		—		—		—		(10)
Balance at December 31, 2019	194		27		(15)		12		206
Additions (Note 10)	142		31		—		31		173
Amortization	—		—		(3)		(3)		(3)
Foreign exchange impact	(7)		(3)		—		(3)		(10)
Balance at December 31, 2020	$	329	$	55	$	(18)	$	37	$	366