Income Taxes (Tables)

6 Months Ended

Jun. 30, 2018

Income Tax Disclosure [Abstract]

Summary of Income Tax Expense

	For the three months ended June 30				For the six months ended June 30
(in millions of Canadian dollars)	2018		2017		2018		2017
Current income tax expense	$	85	$	114	$	166	$	195
Deferred income tax expense	37		24		78		91
Income tax expense	$	122	$	138	$	244	$	286