v3.25.2
Benefit Plans (Schedule of Components of Net Periodic Benefit Cost (Income)) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Pension [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 9 $ 12 $ 18 $ 21
Interest cost 80 81 159 161
Expected return on plan assets (108) (117) (215) (233)
Amortization:        
Net loss (gain) 12 6 25 13
Prior service cost (credit) 1 2 2 3
Net periodic benefit cost (income) (6) (16) (11) (35)
Postretirement [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 3 4 6 8
Interest cost 14 16 28 32
Expected return on plan assets (1) (2) (2) (3)
Amortization:        
Net loss (gain) (3) (1) (6) (2)
Prior service cost (credit) (10) (10) (20) (20)
Net periodic benefit cost (income) $ 3 $ 7 $ 6 $ 15