Earnings per share (Tables)

3 Months Ended

Mar. 31, 2017

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)	2017		2016
Numerator:
Net income	$	1,093	$	439
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding	468,903,086		446,739,586
Denominator for diluted earnings per share:
Share-based compensation plans	3,828,604		3,270,156
Weighted-average shares outstanding and assumed conversions	472,731,690		450,009,742
Basic earnings per share	$	2.33	$	0.98
Diluted earnings per share	$	2.31	$	0.97
Potential anti-dilutive share conversions	969,654		2,074,308