Employee Benefit Plans - Components of Net Periodic Benefit Cost (Benefit) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 1
Interest cost	(45)	(28)
Expected return on plan assets	(59)	(51)
Amortization of prior service credit	0	0
Amortization of actuarial loss	(7)	(15)
Net periodic cost (benefit)	(6)	(7)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	(2)	(1)
Expected return on plan assets	0	0
Amortization of prior service credit	(2)	(2)
Amortization of actuarial loss	(1)	(2)
Net periodic cost (benefit)	$ 1	$ 1