Income Taxes (Tables)

9 Months Ended

Sep. 30, 2018

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)	2018		2017		2018		2017
Current income tax expense	$	122	$	93	$	288	$	288
Deferred income tax expense	77		77		155		168
Income tax expense	$	199	$	170	$	443	$	456