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Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of stock-based compensation cost
Second QuarterFirst Six Months
2023202220232022
($ in millions)
Stock-based compensation expense$11 $13 $22 $36 
Total tax benefit17 
Schedule of LTIP awards
During 2023, we granted stock options, restricted stock units (RSUs) and performance share units (PSUs) pursuant to the Long-Term Incentive Plan (LTIP), as follows:

Second QuarterFirst Six Months
GrantedWeighted-Average Grant-Date Fair ValueGrantedWeighted-Average Grant-Date Fair Value
Stock options— $— 69,580 $77.60 
RSUs20,150 199.33 193,371 233.71 
PSUs920 209.22 58,960 236.25 
Schedule of cash proceeds received from share-based payment awards
Second QuarterFirst Six Months
2023202220232022
($ in millions)
Options exercised10,46139,546 77,272 158,889 
Cash received upon exercise$$$$14 
Related tax benefits realized— 
Restricted Stock Units (RSUs)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of share-based compensation, activity
Second QuarterFirst Six Months
2023202220232022
($ in millions)
RSUs vested3,908 3,652 153,030 246,953 
Common Stock issued net of tax withholding2,811 2,612 107,419 174,976 
Related tax benefits realized$— $— $$
Performance Share Units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of share-based compensation, activity
First Six Months
20232022
($ in millions)
PSUs earned58,599 86,420 
Common Stock issued net of tax withholding40,255 54,651 
Related tax benefits realized$— $