Consolidated Statements of Changes in Equity - 3 months ended Mar. 31, 2016 - USD ($) shares in Millions, $ in Millions	Total	EBT	Common stock	Additional paid-in capital	Treasury stock	Treasury stock EBT	Accumulated other comprehensive loss	Retained earnings	Retained earnings EBT
As at Dec. 31, 2015	$ 9,829.1		$ 58.9	$ 4,486.3	$ (320.6)		$ (183.8)	$ 5,788.3
Shares as at Dec. 31, 2015	601.1		601.1
Net income	$ 419.0							419.0
Other comprehensive income, net of tax	24.4						24.4
Options exercised	0.1		$ 0.1
Option exercised (in shares)			0.1
Share-based compensation	18.3			$ 18.3
Tax benefit associated with exercise of stock options (in US dollar)	3.2			3.2
Shares released by employee benefit trust to satisfy exercise of stock options		$ 0.6				$ 17.8			$ (17.2)
As at Mar. 31, 2016	$ 10,294.7		$ 59.0	$ 4,507.8	$ (302.8)		$ (159.4)	$ 6,190.1
Shares as at Mar. 31, 2016	601.2		601.2