v3.25.2
Employee Benefit Plans (Net Periodic Defined Benefit Cost) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Defined Benefit Plan Disclosure [Line Items]        
Net periodic defined benefit credit     $ (20) $ (24)
Qualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 8 $ 9 17 17
Interest cost 22 21 43 42
Expected return on plan assets (45) (45) (89) (90)
Amortization of prior service credit (3) (4) (7) (7)
Amortization of net loss 5 5 11 11
Total other components of net benefit credit (21) (23) (42) (44)
Net periodic defined benefit credit (13) (14) (25) (27)
Non-Qualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 1 0 2 1
Interest cost 2 2 4 4
Amortization of prior service credit (1) (1) (2) (3)
Amortization of net loss 1 1 2 2
Total other components of net benefit credit 2 2 4 3
Net periodic defined benefit credit 3 2 6 4
Postretirement Benefit Plan        
Defined Benefit Plan Disclosure [Line Items]        
Expected return on plan assets 0 0 (1) (1)
Net periodic defined benefit credit $ 0 $ 0 $ (1) $ (1)