XML 46 R34.htm IDEA: XBRL DOCUMENT v3.21.2
Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2021
Share-based Payment Arrangement [Abstract]  
Share-based Compensation, Activity [Table Text Block]
Stock-based compensation and the income tax benefit recognized during the three and six months ended June 30, 2021 and 2020 were as follows:
Three Months Ended
June 30		Six Months Ended
June 30
($ in millions)2021202020212020
Stock-based compensation$18 $8 $35 $15 
Income tax benefit recognized$4 $2 $8 $4 
Details of Grants of Stock-based Compensation
Grants of stock-based compensation during the six months ended June 30, 2021 and 2020 were as follows:
Six Months Ended
June 30
20212020
Grant DetailsSharesFair ValueSharesFair Value
Stock options527,464 $29.27 663,485 $21.93 
Restricted stock units185,084 $132.63 203,239 $110.00 
Contingent shares (a)
55,540 $136.60 55,319 $119.52 
(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 option grants issued during the six months ended June 30, 2021 was calculated with the following weighted average assumptions:
Weighted average exercise price$136.60
Risk free interest rate1.0 %
Expected life of option in years6.5
Expected dividend yield1.6 %
Expected volatility25.3 %