Employee Benefit Plans - Postemployment Plan Net Cost (Details) - Postemployment Retirement Benefits - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
Net service cost	$ 3	$ 36	$ 6	$ 49
Interest cost	2	0	3	1
Amortization of prior service benefit	(1)	0	(1)	(1)
Actuarial gain	1	0	2	0
Net benefit cost	$ 3	$ 36	$ 6	$ 49