Employee Benefits - Schedule of Net Periodic Benefit (Income) Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected return on plan assets	$ (329)	$ (535)
Combined Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	37	56	$ 59
Interest cost	154	201	324
Settlement charges		383
Combined Pension Plan | Qualified Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	44	56	59
Interest cost	194	201	324
Expected return on plan assets	(385)	(535)	(593)
Settlement charges	0	383	0
Realized to gain on sale of businesses	546	0	0
Special termination benefits charge	0	6	13
Recognition of prior service credit	(10)	(9)	(9)
Recognition of actuarial loss	122	184	202
Net periodic pension expense (income)	511	286	(4)
Post-Retirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	10	14	14
Interest cost	72	47	69
Expected return on plan assets	0	0	(1)
Realized to gain on sale of businesses	(32)	0	0
Recognition of prior service credit	8	15	16
Recognition of actuarial loss	(4)	4	0
Curtailment loss	0	0	8
Net periodic pension expense (income)	$ 54	$ 80	$ 106