Earnings per share

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Earnings per share

Earnings per share

	Years Ended December 31
(in millions of U.S. dollars, except share and per share data)	2014		2013		2012
Numerator:
Net income	$	2,853	$	3,758	$	2,706
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding	335,609,899		340,906,490		339,843,438
Denominator for diluted earnings per share:
Share-based compensation plans	3,376,388		3,241,085		2,903,512
Weighted-average shares outstanding       and assumed conversions	338,986,287		344,147,575		342,746,950
Basic earnings per share	$	8.50	$	11.02	$	7.96
Diluted earnings per share	$	8.42	$	10.92	$	7.89
Potential anti-dilutive share conversions	1,024,788		1,031,297		896,591

Excluded from weighted-average shares outstanding and assumed conversions is the impact of securities that would have been anti-dilutive during the respective years.