Earnings per share (Tables)

3 Months Ended

Mar. 31, 2014

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)	2014		2013
Numerator:
Net income	$	734	$	953
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding	338,869,562		340,778,142
Denominator for diluted earnings per share:
Share-based compensation plans	3,171,174		3,128,226
Weighted-average shares outstanding and assumed conversions	342,040,736		343,906,368
Basic earnings per share	$	2.16	$	2.80
Diluted earnings per share	$	2.14	$	2.77
Potential anti-dilutive share conversions	657,182		634,385