Pension and Other Postretirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	1	1	4	4
Less Expected return on plan assets	(1)	(2)	(5)	(6)
Amortization of net actuarial loss (gain)	0	0	1	1
Amortization of prior service cost	0	0	0	0
Settlement expense (income)	0	0	1	0
Net periodic benefit cost	0	(1)	1	(1)
Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	0	0	0	0
Less Expected return on plan assets	0	0	0	0
Amortization of net actuarial loss (gain)	0	0	0	(1)
Amortization of prior service cost	0	0	0	0
Settlement expense (income)	0	0	0	0
Net periodic benefit cost	0	0	0	(1)
Supplemental Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	0	0	1	0
Less Expected return on plan assets	0	0	0	0
Amortization of net actuarial loss (gain)	0	0	0	0
Amortization of prior service cost	0	0	0	0
Settlement expense (income)	0	0	0	0
Net periodic benefit cost	$ 0	$ 0	$ 1	$ 0