Employee Benefit Plans, Components of Net Periodic Benefit Cost (Credit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
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	$ 152	$ 161	$ 140
Interest cost	85	73	85
Expected return on plan assets	(192)	(192)	(179)
Amortization of:
Net actuarial (gain) loss	52	81	74
Prior service credit	(18)	(18)	(19)
Settlement loss	61	8	5
Net periodic benefit cost	140	113	106
Other Postretirement Benefit Plans [Member]
Components of net periodic benefit cost:
Service cost	6	7	6
Interest cost	8	7	9
Expected return on plan assets	0	0	0
Amortization of:
Net actuarial (gain) loss	0	(1)	0
Prior service credit	(4)	(7)	(7)
Settlement loss	0	0	0
Net periodic benefit cost	$ 10	$ 6	$ 8