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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2025
Share-Based Payment Arrangement [Abstract]  
Summary of restricted stock activity under the Plan
A summary of restricted stock activity during the year ended December 31, 2025 is presented below.
Restricted Stock AwardsRestricted Stock UnitsPerformance Restricted Stock Units
 SharesWeighted-
Average
Grant-Date
Fair Value		SharesWeighted-
Average
Grant-Date
Fair Value		SharesWeighted-
Average
Grant-Date
Fair Value
Outstanding as of December 31, 202423,367 $79.59 471,657 $79.36 272,000 $84.66 
Granted24,033 81.98 262,093 85.66 152,390 87.60 
Restrictions lapsed (vested)(1)
(23,367)79.59 (197,545)78.15 (141,616)85.25 
Forfeited— — (13,105)83.64 (3,257)85.89 
Outstanding as of December 31, 202524,033 81.98 523,100 82.86 279,517 85.95 
_______________________________________________________________________________
(1)For performance restricted stock units, the shares represent the performance restricted stock units granted in 2022, for which the three-year performance period ended December 31, 2024.
Summary of selected amounts pertaining to restricted stock that vested .
Summary of stock-based compensation costs and related income tax benefits The following table summarizes stock-based compensation costs and related income tax benefits:
 Year ended December 31,
 202520242023
 (in millions)
Stock-based compensation expense$45 $36 $37 
Income tax benefit(4)(8)(9)
Stock-based compensation expense, net of income taxes$41 $28 $28