v3.26.1
Employee Benefits - Fair Values of Pension Plan Assets by Asset Category (Details) - Pension Plans - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Plan assets $ 790 $ 805 $ 827
Fair Value, Inputs, Level 1, 2 and 3 | Fixed income — U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 321 324  
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 0 0  
Level 1 | Fixed income — U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 0 0  
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 321 324  
Level 2 | Fixed income — U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 321 324  
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 0 0  
Level 3 | Fixed income — U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 0 0  
Measured at NAV | Collective investment funds (measured at NAV)      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 446 459  
Measured at NAV | Insurance investment contracts and pooled separate accounts (measured at NAV)      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets $ 23 $ 22