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Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of stock-based compensation cost
Third QuarterFirst Nine Months
2023202220232022
($ in millions)
Stock-based compensation expense$10 $13 $32 $49 
Total tax benefit11 24 
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:

Third QuarterFirst Nine Months
GrantedWeighted-Average Grant-Date Fair ValueGrantedWeighted-Average Grant-Date Fair Value
Stock options— $— 69,580 $77.60 
RSUs6,448 230.82 199,819 233.61 
PSUs110 234.37 59,070 236.25 
Schedule of cash proceeds received from share-based payment awards
Third QuarterFirst Nine Months
2023202220232022
($ in millions)
Options exercised9,934116,881 87,206 275,770 
Cash received upon exercise$$$$23 
Related tax benefits realized— 11 
Restricted Stock Units (RSUs)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of share-based compensation, activity
Third QuarterFirst Nine Months
2023202220232022
($ in millions)
RSUs vested2,587 557 155,617 247,510 
Common Stock issued net of tax withholding1,734 397 109,153 175,373 
Related tax benefits realized$— $— $$
Performance Share Units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of share-based compensation, activity
First Nine Months
20232022
($ in millions)
PSUs earned58,599 86,420 
Common Stock issued net of tax withholding40,255 54,651 
Related tax benefits realized$— $