v3.25.4
Employee Benefit Plans - Plan's Assets Carried at Fair Value (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements $ 163 $ 173
Bonds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements 74 90
Other Contract [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements 89 83
Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements 79 110
Fair Value, Inputs, Level 2 [Member] | Bonds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements 74 90
Fair Value, Inputs, Level 2 [Member] | Other Contract [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements 5 20
Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements 84 63
Fair Value, Inputs, Level 3 [Member] | Other Contract [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements $ 84 $ 63