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Stock Compensation Plans - SSAR's and Stock Option Outstanding (Detail) - SSAR's and Options [Member] - Over $65
$ / shares in Units, shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number Outstanding (in shares) | shares 288
Weighted Average Remaining Contractual Life (in years) 3 years 8 months 8 days
Weighted Average Exercise Price (in dollars per share) | $ / shares $ 116,450
Aggregate Intrinsic Value | $ $ 0
Number Exercisable (in shares) | shares 197
Weighted Average Remaining Contractual Life (in years) 3 years 4 months 20 days
Weighted Average Exercise Price (in dollars per share) | $ / shares $ 111.70
Aggregate Intrinsic Value | $ $ 0