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Earnings per share
3 Months Ended
Mar. 31, 2021
Earnings Per Share [Abstract]  
Earnings per share Earnings per share
Three Months Ended
March 31
(in millions of U.S. dollars, except share and per share data)20212020
Numerator:
Net income$2,300 $252 
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding450,539,568 451,868,658 
Denominator for diluted earnings per share:
Share-based compensation plans2,795,971 2,651,610 
Weighted-average shares outstanding and assumed conversions
453,335,539 454,520,268 
Basic earnings per share$5.10 $0.56 
Diluted earnings per share$5.07 $0.55 
Potential anti-dilutive share conversions1,952,612 3,154,406 

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