Employee Retirement Plans - Schedule of Net Periodic Pension Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Qualified
Net periodic pension cost for the company's defined-benefit pension plans
Service cost	$ 1	$ 1	$ 2	$ 3
Interest cost	0	1	1	14
Expected return on plan assets	(1)	(1)	(2)	(8)
Settlement loss			0	406
Amortization of net loss	1	2	3	13
Net periodic pension cost	1	3	4	428
Non-Qualified
Net periodic pension cost for the company's defined-benefit pension plans
Service cost	0	0	0	0
Interest cost	1	2	3	3
Expected return on plan assets	0	0	0	0
Settlement loss			0	0
Amortization of net loss	0	0	1	2
Net periodic pension cost	$ 1	$ 2	$ 4	$ 5