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Net Income per Common Share
 12 Months Ended
Dec. 31, 2025
Earnings Per Share [Abstract]  
Net Income per Common Share Net Income per Common Share
The computations of net income per common share are presented in the following table.
TABLE 81: NET INCOME PER COMMON SHARE
FOR THE YEAR ENDED DECEMBER 31,
($ In Millions Except Per Common Share Information)202520242023
BASIC NET INCOME PER COMMON SHARE
Average Number of Common Shares Outstanding191,358,026 201,263,646 207,248,094 
Net Income$1,736.9 $2,031.1 $1,107.3 
Less: Dividends on Preferred Stock41.8 41.8 41.8 
Net Income Applicable to Common Stock1,695.1 1,989.3 1,065.5 
Less: Earnings Allocated to Participating Securities15.9 16.9 11.6 
Earnings Allocated to Common Shares Outstanding$1,679.2 $1,972.4 $1,053.9 
Basic Net Income Per Common Share8.78 9.80 5.09 
DILUTED NET INCOME PER COMMON SHARE
Average Number of Common Shares Outstanding191,358,026 201,263,646 207,248,094 
Plus Dilutive Effect of Share-based Compensation888,499 606,459 315,652 
Average Common and Potential Common Shares192,246,525 201,870,105 207,563,746 
Earnings Allocated to Common and Potential Common Shares$1,679.3 $1,972.3 $1,053.9 
Diluted Net Income Per Common Share8.74 9.77 5.08 
Note: For the year ended December 31, 2025, there were no common stock equivalents excluded from the computation of diluted net income per common share because their inclusion would have been antidilutive. For the years ended December 31, 2024 and 2023, there were 0.1 million common stock equivalents excluded in the computation of diluted net income per share.