Earnings per share (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Schedule Of Earnings Per Share, Basic And Diluted

	Three Months Ended				Six Months Ended
	June 30				June 30
(in millions of U.S. dollars, except share and per share data)	2013		2012		2013		2012
Numerator:
Net income	$	891	$	328	$	1,844	$	1,301
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding	341,047,290		339,766,067		340,913,450		339,164,449
Denominator for diluted earnings per share:
Share-based compensation plans	3,053,975		2,907,971		3,120,263		3,006,950
Adjusted weighted-average shares outstanding and assumed conversions	344,101,265		342,674,038		344,033,713		342,171,399
Basic earnings per share	$	2.61	$	0.96	$	5.41	$	3.83
Diluted earnings per share	$	2.59	$	0.96	$	5.36	$	3.80
Potential anti-dilutive share conversions	1,811,030		1,471,035		1,231,105		1,051,182