Benefit Plans (Schedule of Components of Net Periodic Pension Cost) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 37	$ 41	$ 39
Interest cost	318	321	333
Expected return on plan assets	(430)	(465)	(485)
Amortization:
Net loss (gain)	50	28	4
Prior service cost (credit)	5	5	6
Net periodic benefit cost (income)	(20)	(70)	(103)
Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	11	15	15
Interest cost	56	62	65
Expected return on plan assets	(5)	(6)	(8)
Amortization:
Net loss (gain)	(12)	(6)	(2)
Prior service cost (credit)	(41)	(41)	(40)
Net periodic benefit cost (income)	$ 9	$ 24	$ 30