Earnings per share (Tables)

6 Months Ended

Jun. 30, 2015

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)	2015		2014		2015		2014
Numerator:
Net income	$	942	$	779	$	1,623	$	1,513
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding	325,463,196		337,846,228		326,795,838		338,353,260
Denominator for diluted earnings per share:
Share-based compensation plans	3,222,562		3,286,359		3,373,809		3,267,499
Weighted-average shares outstanding and assumed conversions	328,685,758		341,132,587		330,169,647		341,620,759
Basic earnings per share	$	2.89	$	2.30	$	4.97	$	4.47
Diluted earnings per share	$	2.86	$	2.28	$	4.91	$	4.43
Potential anti-dilutive share conversions	1,934,454		1,778,040		1,306,817		1,220,731