Earnings per share

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Earnings per share

Earnings per share

	Three Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars, except share and per share data)	2015		2014		2015		2014
Numerator:
Net income	$	528	$	785	$	2,151	$	2,298
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding	324,210,936		334,472,324		325,904,502		337,083,498
Denominator for diluted earnings per share:
Share-based compensation plans	2,962,484		3,201,656		3,269,724		3,298,569
Weighted-average shares outstanding and assumed conversions	327,173,420		337,673,980		329,174,226		340,382,067
Basic earnings per share	$	1.63	$	2.35	$	6.60	$	6.82
Diluted earnings per share	$	1.62	$	2.32	$	6.53	$	6.75
Potential anti-dilutive share conversions	1,907,815		1,227,575		1,503,830		1,410,340

Excluded from weighted-average shares outstanding and assumed conversions is the impact of securities that would have been anti-dilutive during the respective periods.