Employee Benefit Plans - Postemployment Plan Net Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Postretirement Plan
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 0	$ 0	$ 0	$ 0
Amortization of prior service benefit	0	0	0	0
Actuarial gain	0	1	0	1
Net benefit cost	0	1	0	1
Postemployment Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Net service cost	3	8	9	57
Interest cost	1	1	4	2
Amortization of prior service benefit	0	0	(1)	(1)
Actuarial gain	0	(1)	(2)	(1)
Net benefit cost	$ 4	$ 8	$ 10	$ 57