Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2011

Earnings Per Share [Abstract]

Schedule Of Earnings Per Share, Basic And Diluted

	Years Ended December 31
(in millions of U.S. dollars, except share and per share data)	2011		2010		2009
Numerator:
Net Income	$	1,585	$	3,108	$	2,549
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding		338,159,409		339,685,143		336,725,625
Denominator for diluted earnings per share:
Share-based compensation plans		2,620,815		1,561,244		813,669
Adjusted weighted-average shares outstanding and assumed conversions		340,780,224		341,246,387		337,539,294
Basic earnings per share	$	4.68	$	9.15	$	7.57
Diluted earnings per share	$	4.65	$	9.11	$	7.55