Pension and Other Postretirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0
Interest cost	2	1
Less Expected return on plan assets	(2)	(2)
Amortization of net actuarial loss (gain)	0	1
Amortization of prior service cost	0	0
Settlement expense (income)	1	0
Net periodic benefit cost	1	0
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	0	0
Less Expected return on plan assets	0	0
Amortization of net actuarial loss (gain)	0	0
Amortization of prior service cost	0	0
Settlement expense (income)	0	0
Net periodic benefit cost	0	0
Supplemental Employee Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	0	0
Less Expected return on plan assets	0	0
Amortization of net actuarial loss (gain)	0	0
Amortization of prior service cost	0	0
Settlement expense (income)	0	0
Net periodic benefit cost	$ 0	$ 0