Income Taxes (Tables)

9 Months Ended

Sep. 30, 2017

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)	2017		2016		2017		2016
Current income tax expense	$	93	$	73	$	288	$	177
Deferred income tax expense	77		50		168		233
Income tax expense	$	170	$	123	$	456	$	410