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Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of stock-based compensation cost
Second QuarterFirst Six Months
2022202120222021
($ in millions)
Stock-based compensation expense$13 $16 $36 $32 
Total tax benefit17 25 
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:

Second QuarterFirst Six Months
GrantedWeighted-Average Grant-Date Fair ValueGrantedWeighted-Average Grant-Date Fair Value
Stock options1,640 $84.01 133,810 $60.69 
RSUs9,090 265.31 163,991 268.31 
PSUs2,430 271.83 51,455 274.70 
Schedule of cash proceeds received from share-based payment awards
Second QuarterFirst Six Months
2022202120222021
($ in millions)
Options exercised39,546128,934 158,889 341,480 
Cash received upon exercise$$12 $14 $31 
Related tax benefits realized12 
Restricted Stock Units (RSUs)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of share-based compensation, activity
Second QuarterFirst Six Months
2022202120222021
($ in millions)
RSUs vested3,652 1,730 246,953 259,127 
Common Stock issued net of tax withholding2,612 1,222 174,976 183,511 
Related tax benefits realized$— $— $$
Performance Share Units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of share-based compensation, activity
First Six Months
20222021
($ in millions)
PSUs earned86,420 78,727 
Common Stock issued net of tax withholding54,651 49,967 
Related tax benefits realized$$