v3.26.1
Employee Benefits - Net Pension Cost and Amount Recognized in OCI for All Funded and Unfunded Plans (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Pension Plans      
Defined Benefit Plan Disclosure [Line Items]      
Interest cost on PBO $ 43 $ 41 $ 45
Expected return on plan assets (44) (39) (42)
Amortization of losses (gains) 8 9 9
Amortization of prior service credit 0 0 0
Settlement loss 0 0 18
Net pension cost 7 11 30
Other changes in plan assets and benefit obligations recognized in OCI:      
Net (gain) loss 6 26 26
Amortization of (gains) (8) 6 (27)
Amortization of prior service credit 0 0 0
Total recognized in comprehensive income (2) 32 (1)
Total recognized in net pension cost and comprehensive income 5 43 29
Postretirement Benefit Plan      
Defined Benefit Plan Disclosure [Line Items]      
Interest cost on PBO 2 2 2
Expected return on plan assets (2) (2) (2)
Amortization of losses (gains) (1) (1) (1)
Amortization of prior service credit (1) (1) (1)
Settlement loss 0 0 0
Net pension cost (2) (2) (2)
Other changes in plan assets and benefit obligations recognized in OCI:      
Net (gain) loss 1 1 1
Amortization of (gains) 0 0 0
Amortization of prior service credit 1 1 1
Total recognized in comprehensive income 2 2 2
Total recognized in net pension cost and comprehensive income $ 0 $ 0 $ 0