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Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock-Based Compensation Expense and Related Tax Benefits
Third QuarterFirst Nine Months
2024202320242023
($ in millions)
Stock-based compensation expense$(5)$10 $27 $32 
Total tax benefit (expense)(1)2 7 11 
Schedule of Long-Term Incentive Plan Awards
During 2024, 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 options28,510 $70.14 100,940 $77.27 
RSUs19,873 247.86 246,382 235.68 
PSUs850 255.22 58,870 258.97 
Summary of Stock Options, Restricted Stock Units, and Performance Share Units
Third QuarterFirst Nine Months
2024202320242023
($ in millions)
Options exercised142,8339,934 257,807 87,206 
Cash received upon exercise$20 $1 $31 $7 
Related tax benefits realized3 — 6 3 
Third QuarterFirst Nine Months
2024202320242023
($ in millions)
RSUs vested1,836 2,587 170,981 155,617 
Common Stock issued net of tax withholding1,391 1,734 118,657 109,153 
Related tax benefits realized$— $— $— $1 
First Nine Months
20242023
($ in millions)
PSUs earned41,580 58,599 
Common Stock issued net of tax withholding26,056 40,255 
Related tax benefits realized$— $—