v3.25.4
Pension and Other Postretirement Benefits - Schedule of Fair Value of Category of Plan Assets (Details) - Defined Benefit Pension Plans - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 112 $ 100 $ 134
Investments measured at fair value:      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 112 114  
Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 14  
Level 2 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 112 100  
Level 3 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Cash and cash equivalents | Investments measured at fair value: | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   8  
Cash and cash equivalents | Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   8  
Cash and cash equivalents | Level 2 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0  
Cash and cash equivalents | Level 3 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0  
Equity securities | Investments measured at fair value: | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   6  
Equity securities | Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   6  
Equity securities | Level 2 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0  
Equity securities | Level 3 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0  
Collective trust funds | Investments measured at fair value: | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 112 100  
Collective trust funds | Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Collective trust funds | Level 2 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 112 100  
Collective trust funds | Level 3 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0