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Earnings per share (Tables)
 12 Months Ended
Dec. 31, 2024
Earnings Per Share [Abstract]  
Schedule of Computation of Basic and Diluted Earnings Per Share

The computation of basic and diluted earnings per share were as follows (dollars and shares in millions):

 

 

 

2024

 

 

2023

 

 

2022

 

Numerator:

 

 

 

 

 

 

 

 

 

Basic and diluted:

 

 

 

 

 

 

 

 

 

Net income attributable to common shareholders

 

$

646

 

 

$

488

 

 

$

423

 

Denominator:

 

 

 

 

 

 

 

 

 

Basic weighted average common stock

 

 

80.2

 

 

 

85.0

 

 

 

87.1

 

Added: Weighted average stock options/share awards

 

 

0.2

 

 

 

0.2

 

 

 

0.2

 

Diluted weighted average common stock

 

 

80.4

 

 

 

85.2

 

 

 

87.2

 

 

 

 

 

 

 

 

 

 

 

Net earnings per share - basic

 

$

8.06

 

 

$

5.74

 

 

$

4.86

 

Net earnings per share - diluted

 

$

8.04

 

 

$

5.72

 

 

$

4.85