v3.25.1
Benefit Plans (Schedule of Components of Net Periodic Benefit Cost (Income)) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Pension [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 9 $ 9
Interest cost 79 80
Expected return on plan assets (107) (116)
Amortization:    
Net loss (gain) 13 7
Prior service cost (credit) 1 1
Net periodic benefit cost (income) (5) (19)
Postretirement [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 3 4
Interest cost 14 16
Expected return on plan assets (1) (1)
Amortization:    
Net loss (gain) (3) (1)
Prior service cost (credit) (10) (10)
Net periodic benefit cost (income) $ 3 $ 8