Earnings per share (Tables)

3 Months Ended

Mar. 31, 2020

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)	2020		2019
Numerator:
Net income	$	252	$	1,040
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding	451,868,658		458,805,185
Denominator for diluted earnings per share:
Share-based compensation plans	2,651,610		2,731,755
Weighted-average shares outstanding and assumed conversions	454,520,268		461,536,940
Basic earnings per share	$	0.56	$	2.27
Diluted earnings per share	$	0.55	$	2.25
Potential anti-dilutive share conversions	3,154,406		4,343,204