Earnings per share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Schedule Of Earnings Per Share, Basic And Diluted

	Three Months Ended
	March 31
(in millions of U.S. dollars, except share and per share data)	2019		2018
Numerator:
Net income	$	1,040	$	1,082
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding	458,805,185		465,703,240
Denominator for diluted earnings per share:
Share-based compensation plans	2,731,755		3,770,351
Weighted-average shares outstanding and assumed conversions	461,536,940		469,473,591
Basic earnings per share	$	2.27	$	2.32
Diluted earnings per share	$	2.25	$	2.30
Potential anti-dilutive share conversions	4,343,204		2,116,188