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Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of stock-based compensation cost
Third QuarterFirst Nine Months
2022202120222021
($ in millions)
Stock-based compensation expense$13 $14 $49 $46 
Total tax benefit24 28 
Schedule of LTIP awards
During 2022, 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 options6,000 $74.95 139,810 $61.30 
RSUs9,993 240.63 173,984 266.72 
PSUs6,960 256.12 58,415 272.48 
Schedule of cash proceeds received from share-based payment awards
Third QuarterFirst Nine Months
2022202120222021
($ in millions)
Options exercised116,88122,502 275,770 363,982 
Cash received upon exercise$$$23 $33 
Related tax benefits realized11 13 
Restricted Stock Units (RSUs)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of share-based compensation, activity
Third QuarterFirst Nine Months
2022202120222021
($ in millions)
RSUs vested557 1,100 247,510 260,227 
Common Stock issued net of tax withholding397 761 175,373 184,272 
Related tax benefits realized$— $— $$
Performance Share Units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of share-based compensation, activity
First Nine Months
20222021
($ in millions)
PSUs earned86,420 78,727 
Common Stock issued net of tax withholding54,651 49,967 
Related tax benefits realized$$