v3.23.1
Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Share-based Compensation, Activity [Table Text Block]
Stock-based compensation expense and the associated income tax benefit recognized during the three months ended March 31, 2023 and 2022 were as follows:
Three Months Ended
March 31
($ in millions)20232022
Stock-based compensation expense$17 $6 
Income tax benefit recognized$4 $1 
Details of Grants of Stock-based Compensation
Grants of stock-based compensation during the three months ended March 31, 2023 and 2022 were as follows:
Three Months Ended
March 31
20232022
SharesFair ValueSharesFair Value
Stock options410,001 $38.55 487,277 $36.52 
Restricted stock units248,949 $124.44 189,411 $143.92 
Contingent shares (a)
52,389 $129.03 57,134 $151.87 
(a)The number of contingent shares represents the target value of the award.
Weighted Average Assumptions Used in Calculating the Fair Value of Stock Option The fair value of the stock options granted during the three months ended March 31, 2023 was calculated with the following weighted average assumptions:
Weighted average exercise price$130.08
Risk-free interest rate3.9 %
Expected life of option in years6.5
Expected dividend yield1.7 %
Expected volatility27.8 %