v3.26.1
Stock Based Compensation - Summary of Stock Option and Stock Appreciation Rights ("SARs") Restricted Stock Units ("RSUs") and Performance Stock Units ("PSU") Activity (Detail)
shares in Millions
6 Months Ended
Jun. 30, 2026
shares
Stock Options and SARs  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Shares, Outstanding Opening 24.3
Granted 2.1
Cancelled/forfeited (0.3)
Exercised (0.6)
Number of Shares, Outstanding Closing 25.5
PSUs and RSUs  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Shares, Outstanding Opening 5.0
Granted 3.2
Cancelled/forfeited (0.2)
Number of Shares, Outstanding Closing 6.0
Vested (2.0)