v3.26.1
Benefit Plans (Schedule of Components of Net Periodic Pension Cost) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Pension [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 8 $ 9
Interest cost 72 79
Expected return on plan assets (99) (107)
Amortization:    
Net loss (gain) 24 13
Prior service cost (credit) 1 1
Net periodic benefit cost (income) 6 (5)
Postretirement Benefit Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 2 3
Interest cost 13 14
Expected return on plan assets (1) (1)
Amortization:    
Net loss (gain) (3) (3)
Prior service cost (credit) (10) (10)
Net periodic benefit cost (income) $ 1 $ 3