Consolidated Statements of Changes in Equity (USD $) In Millions	Total	Common stock	Additional paid-in capital	Treasury stock	Accumulated other comprehensive income	Retained earnings
As at Dec. 31, 2013	$ 5,366.0	$ 58.6	$ 4,186.3	$ (450.6)	$ 110.2	$ 1,461.5
Shares as at Dec. 31, 2013	597.5	597.5
Net income	753.5					753.5
Other comprehensive income, net of tax	13.9				13.9
Options exercised
Option exercised (in shares)		0.8
Share-based compensation	55.7		55.7
Tax benefit associated with exercise of stock options (in US dollar)	29.1		29.1
Shares released by Employee Benefit Trust ("EBT") to satisfy exercise of stock options	0.5			82.5		(82.0)
Dividends	(99.6)					(99.6)
As at Jun. 30, 2014	$ 6,119.1	$ 58.6	$ 4,271.1	$ (368.1)	$ 124.1	$ 2,033.4
Shares as at Jun. 30, 2014	598.3	598.3