Selected Quarterly Data (Unaudited)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Data (Unaudited)

For the quarter ended	2018								2017
(in millions of Canadian dollars, except per share data)	Dec. 31		Sep. 30		Jun. 30		Mar. 31		Dec. 31		Sep. 30		Jun. 30		Mar. 31
Total revenues	$	2,006	$	1,898	$	1,750	$	1,662	$	1,713	$	1,595	$	1,643	$	1,603
Operating income(1)	874		790		627		540		682		622		611		604
Net income	545		622		436		348		984		510		480		431
Basic earnings per share(2)	$	3.84	$	4.36	$	3.05	$	2.41	$	6.79	$	3.50	$	3.28	$	2.94
Diluted earnings per share(2)	3.83		4.35		3.04		2.41		6.77		3.50		3.27		2.93

⁽¹⁾ Comparative period figures have been restated for the retrospective adoption of ASU 2017-07, discussed further in this Item 8. Financial Statements and Supplementary Data, Note 2 Accounting changes.

⁽²⁾ Earnings per share for the four quarters combined may not equal earnings per share for the year due to rounding.