Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2017

Equity [Abstract]

Analysis of Common Share Balances

Common Share balances as at December 31:

(number of shares in millions)	2017		2016		2015
Share capital, January 1	146.3		153.0		166.1
CP Common Shares repurchased	(1.9	)	(6.9	)	(13.7	)
Shares issued under stock option plan	0.5		0.2		0.6
Share capital, December 31	144.9		146.3		153.0

Activities Under Shares Repurchase Program

The following table provides the activities under the share repurchase programs:

	2017		2016		2015
Number of Common Shares repurchased	1,888,100		6,910,000		13,549,977
Weighted-average price per share(1)	$	201.53	$	175.08	$	202.79
Amount of repurchase (in millions)(1)	$	381	$	1,210	$	2,748

⁽¹⁾ Includes brokerage fees.