Income Taxes (Tables)

9 Months Ended

Sep. 30, 2016

Income Tax Disclosure [Abstract]

Summary of Income Tax Expense

	For the three months ended September 30				For the nine months ended September 30
(in millions of Canadian dollars)	2016		2015		2016		2015
Current income tax expense	$	73	$	159	$	177	$	364
Deferred income tax expense	50		—		233		106
Income tax expense	$	123	$	159	$	410	$	470