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Earnings Per Common Share (EPS) (Tables)
9 Months Ended
Sep. 30, 2020
Earnings Per Share [Abstract]  
Computation of basic and diluted EPS
The computations of basic and diluted EPS for the three and nine months ended September 30 were as follows:
Three Months Ended
September 30,
Nine Months Ended
September 30,
(Millions, except per share amounts)2020201920202019
Numerator:
Basic and diluted:
Net income$1,073 $1,755 $1,697 $5,066 
Preferred dividends(16)(21)(65)(61)
Net income available to common shareholders$1,057 $1,734 $1,632 $5,005 
Earnings allocated to participating share awards (a)
(7)(11)(10)(35)
Net income attributable to common shareholders$1,050 $1,723 $1,622 $4,970 
Denominator: (a)
Basic: Weighted-average common stock804 825 805 833 
Add: Weighted-average stock options (b)
1 1 
Diluted805 827 806 835 
Basic EPS$1.31 $2.09 $2.01 $5.97 
Diluted EPS$1.30 $2.08 $2.01 $5.95 
(a)Our unvested restricted stock awards, which include the right to receive non-forfeitable dividends or dividend equivalents, are considered participating securities. Calculations of EPS under the two-class method exclude from the numerator any dividends paid or owed on participating securities and any undistributed earnings considered to be attributable to participating securities. The related participating securities are similarly excluded from the denominator.
(b)The dilutive effect of unexercised stock options excludes from the computation of EPS 0.9 million and nil of options for the three months ended September 30, 2020 and 2019, respectively, and 0.6 million and 0.3 million of options for the nine months ended September 30, 2020 and 2019, respectively, because inclusion of the options would have been anti-dilutive.