Earnings per share (Tables)

6 Months Ended

Jun. 30, 2017

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)	2017		2016		2017		2016
Numerator:
Net income	$	1,305	$	726	$	2,398	$	1,165
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding	467,981,077		467,701,328		468,244,458		457,102,802
Denominator for diluted earnings per share:
Share-based compensation plans	3,872,860		3,455,969		3,900,678		3,379,559
Weighted-average shares outstanding and assumed conversions	471,853,937		471,157,297		472,145,136		460,482,361
Basic earnings per share	$	2.79	$	1.55	$	5.12	$	2.55
Diluted earnings per share	$	2.77	$	1.54	$	5.08	$	2.53
Potential anti-dilutive share conversions	2,066,578		2,103,281		1,467,556		2,056,018