Earnings per share (Tables)

12 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

Schedule Of Earnings Per Share, Basic And Diluted

	Years Ended December 31
(in millions of U.S. dollars, except share and per share data)	2013		2012		2011
Numerator:
Net income	$	3,758	$	2,706	$	1,540
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding	340,906,490		339,843,438		338,159,409
Denominator for diluted earnings per share:
Share-based compensation plans	3,241,085		2,903,512		2,620,815
Weighted-average shares outstanding       and assumed conversions	344,147,575		342,746,950		340,780,224
Basic earnings per share	$	11.02	$	7.96	$	4.55
Diluted earnings per share	$	10.92	$	7.89	$	4.52
Potential anti-dilutive share conversions	1,031,297		896,591		111,326