v3.26.3
Benefit Plans (Schedule of Components of Net Periodic Pension Cost) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Pension [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 9 $ 10 $ 27 $ 28
Interest cost 72 78 217 237
Expected return on plan assets (99) (107) (297) (322)
Amortization:        
Net loss (gain) 25 12 73 37
Prior service cost (credit) 1 2 4 4
Net periodic benefit cost (income) 8 (5) 24 (16)
Postretirement Benefit Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 4 2 9 8
Interest cost 12 14 37 42
Expected return on plan assets (1) (1) (3) (3)
Amortization:        
Net loss (gain) (5) (3) (10) (9)
Prior service cost (credit) (10) (11) (30) (31)
Net periodic benefit cost (income) $ 0 $ 1 $ 3 $ 7