Employee Benefit Plans, Components of Net Periodic Benefit Cost (Credit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
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	$ 112	$ 111	$ 152
Interest cost	125	121	85
Expected return on plan assets	(214)	(202)	(192)
Amortization of:
Net actuarial (gain) loss	(5)	(6)	52
Prior service credit	(10)	(18)	(18)
Settlement loss	5	2	61
Net periodic benefit cost	13	8	140
Other Postretirement Benefit Plans [Member]
Components of net periodic benefit cost:
Service cost	4	4	6
Interest cost	13	13	8
Expected return on plan assets	0	0	0
Amortization of:
Net actuarial (gain) loss	(4)	(6)	0
Prior service credit	0	(4)	(4)
Settlement loss	0	0	0
Net periodic benefit cost	$ 13	$ 7	$ 10