Employee Benefit Plans and Postretirement Benefits - Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Amortization of:
Settlement loss and other			$ 125
Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 11	$ 13	14
Interest cost	27	19	39
Expected return on assets	(47)	(53)	(69)
Amortization of:
Prior service cost (credit)	0	0	0
Actuarial loss (gain)	19	25	34
Settlement loss and other	(3)	0	125
Net periodic benefit cost (credit)	7	4	143
Healthcare
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	4	4
Interest cost	6	6	10
Expected return on assets	(5)	(7)	(7)
Amortization of:
Prior service cost (credit)	(126)	(136)	(130)
Actuarial loss (gain)	1	3	2
Settlement loss and other	3	0	0
Net periodic benefit cost (credit)	(117)	(130)	(121)
Other
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	6	6
Interest cost	1	1	1
Expected return on assets	0	0	0
Amortization of:
Prior service cost (credit)	0	0	(1)
Actuarial loss (gain)	(2)	2	1
Settlement loss and other	1	2	2
Net periodic benefit cost (credit)	$ 5	$ 11	$ 9