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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2025
Share-Based Payment Arrangement [Abstract]  
Schedule of Options Granted Under LTIP and TSOP
The Committee granted stock options, RSUs, and PSUs pursuant to the LTIP for the last three years as follows:

202520242023
 GrantedWeighted- Average Grant-Date Fair ValueGrantedWeighted- Average Grant-Date Fair ValueGrantedWeighted- Average Grant-Date Fair Value
Stock options80,067$87.33 107,620$77.38 69,580$77.60 
RSUs205,871256.22 280,111238.28 214,936230.12 
PSUs66,636296.61 64,990258.60 59,200236.16 
Schedule of Compensation Costs and Tax Benefits Related compensation costs and tax benefits during the years were:
 202520242023
 ($ in millions)
Stock-based compensation expense$63 $40 $40 
Total tax benefit16 11 15 
Schedule of Assumptions Used for LTIP And TSOP Grants
The assumptions for the LTIP grants for the last three years are shown in the following table:

 202520242023
Average expected volatility29%28%27%
Average risk-free interest rate4.39%3.93%3.54%
Average expected option term6.5 years6.7 years7.0 years
Schedule of Stock Option Activity
A summary of changes in stock options is presented below:

Stock
Options
Weighted- Average
Exercise Price 
Outstanding at December 31, 2024372,664 $179.14 
Granted80,067 257.26 
Exercised(140,819)119.62 
Forfeited(40)104.23 
Outstanding at December 31, 2025311,872 226.08 
Summary of Stock Options Exercised
The following table provides information related to options exercised for the last three years:
 
 202520242023
 ($ in millions)
Options exercised140,819 348,533 206,016 
Total intrinsic value$20 $46 $27 
Cash received upon exercise17 41 19 
Related tax benefits realized4 8 6 
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity
 202520242023
 ($ in millions)
RSUs vested183,396 171,620 157,417 
Common Stock issued net of tax withholding127,310 118,365 110,069 
Related tax benefits realized$1 $1 $1 
A summary of changes in RSUs is presented below:

RSUsWeighted-
Average
Grant-Date
Fair Value
Nonvested at December 31, 2024468,869 $240.80 
Granted205,871 256.22 
Vested(183,396)242.47 
Forfeited(7,863)242.04 
Nonvested at December 31, 2025483,481 246.71 
Schedule of Other Share Activity
 202520242023
 ($ in millions)
PSUs earned8,540 41,580 58,599 
Common Stock issued net of tax withholding5,633 26,056 40,255 
Related tax benefits realized$— $— $— 

A summary of changes in PSUs is presented below:

PSUsWeighted-
Average
Grant-Date
Fair Value
Balance at December 31, 202475,024 $256.08 
Granted66,636 296.61 
Earned(8,540)274.26 
Unearned(14,232)274.26 
Balance at December 31, 2025118,888 275.32 
Schedule of Stock Available for Future Grants
Shares of Common Stock available for future grants and issued in connection with all features of the LTIP and the TSOP at December 31, were as follows:
 
 202520242023
Available for future grants:   
LTIP6,942,153 7,438,613 7,731,573 
TSOP437,746 437,746 436,571 
Shares issued during the year:   
LTIP236,986 444,189 315,700 
TSOP36,776 48,765 40,640