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Earnings Per Common Share (Tables)
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Earnings (Loss) Per Common Share
Computation of Basic and Diluted Earnings per Common Share
 For the years ended December 31,
(In millions, except for per share data)202120202019
Earnings   
Net income$2,365 $1,737 $2,085 
Less: Preferred stock dividends 21 21 21 
Net income available to common stockholders$2,344 $1,716 $2,064 
Shares
   
Weighted average common shares outstanding, basic349.1 358.3 360.9 
Dilutive effect of warrants [1]— — 0.5 
Dilutive effect of stock-based awards under compensation plans5.0 2.3 3.5 
Weighted average common shares outstanding and dilutive potential common shares [2]
354.1 360.6 364.9 
Net income available to common stockholders per common share
   
Basic
$6.71 $4.79 $5.72 
    Diluted$6.62 $4.76 $5.66 
[1]On June 26, 2019 the Capital Purchase Program warrants issued in 2009 expired.
[2]For additional information, see Note 16 - Equity and Note 20 - Stock Compensation Plans of Notes to Consolidated Financial Statements.