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Net Income Per Common Share Computations (Tables)
3 Months Ended
Mar. 31, 2019
Earnings Per Share [Abstract]  
Net Income per Common Share
The computations of net income per common share are presented in the following table.
Table 62: Net Income per Common Share
 
Three Months Ended March 31,
($ In Millions Except Per Common Share Information)
2019
 
2018
Basic Net Income Per Common Share
 
 
 
Average Number of Common Shares Outstanding
218,236,802

 
225,681,167

Net Income
$
347.1

 
$
381.6

Less: Dividends on Preferred Stock
17.3

 
17.3

Net Income Applicable to Common Stock
$
329.8

 
$
364.3

Less: Earnings Allocated to Participating Securities
4.3

 
5.2

Earnings Allocated to Common Shares Outstanding
$
325.5

 
$
359.1

Basic Net Income Per Common Share
$
1.49

 
$
1.59

Diluted Net Income Per Common Share
 
 
 
Average Number of Common Shares Outstanding
218,236,802

 
225,681,167

Plus: Dilutive Effect of Share-based Compensation
1,033,413

 
1,366,352

Average Common and Potential Common Shares
219,270,215

 
227,047,519

Earnings Allocated to Common and Potential Common Shares
$
325.4

 
$
359.2

Diluted Net Income Per Common Share
$
1.48

 
$
1.58

Note: For the three months ended March 31, 2019, there were no common stock equivalents excluded in the computation of diluted net income per share. There were no common stock equivalents excluded in the computation of diluted net income per share for the three months ended March 31, 2018.