Employee Benefit Plans, Components of Net Periodic Benefit Cost (Credit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Employee Benefit Plans (Textual)
The percentage of the greater of the projected benefit obligation or market-related value of plan assets in excess of which net actuarial (gains) losses are amortized	10.00%
Pension Plans [Member]
Components of net periodic benefit cost:
Service cost	$ 109	$ 112	$ 111
Interest cost	135	125	121
Expected return on plan assets	(222)	(214)	(202)
Amortization of:
Net actuarial gain	(9)	(5)	(6)
Prior service cost (credit)	6	(10)	(18)
Settlement loss	6	5	2
Net periodic benefit cost	25	13	8
Other Postretirement Benefit Plans [Member]
Components of net periodic benefit cost:
Service cost	3	4	4
Interest cost	12	13	13
Expected return on plan assets	0	0	0
Amortization of:
Net actuarial gain	(7)	(4)	(6)
Prior service cost (credit)	0	0	(4)
Settlement loss	0	0	0
Net periodic benefit cost	$ 8	$ 13	$ 7