Employee Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Target allocation and pension plan asset allocation
Contributions made to defined benefit pension plans	$ 1	$ 20
Estimated fair value of plan assets	182	227	$ 206
Reconciliation of benefit obligation:
Benefit obligation at beginning of year	362	379
Service cost	9	10	9
Interest cost	10	9	11
Actuarial gains	(97)	(10)
Plan settlements		(19)
Benefits paid	(8)	(7)
Benefit obligation at end of year	276	362	379
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	227	206
Actual return on plan assets	(38)	27
Employer contributions	1	20
Plan settlements		(19)
Benefits paid	(8)	(7)
Fair value of plan assets at end of year	182	227	206
Funded status	(94)	(135)
Components of net periodic benefit cost:
Service cost	9	10	9
Interest cost	10	9	11
Expected return on plan assets	(14)	(12)	(11)
Amortization and other	6	9	7
Settlement loss recognized		6	11
Net periodic benefit cost	11	22	$ 27
Amounts not reflected in net periodic benefit cost and included in accumulated other comprehensive loss (AOCL) before taxes
Total accumulated other comprehensive loss	21	71
Defined benefit pension plan
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	$ 182	$ 227
Weighted-average assumptions
Expected return on plan assets (as a percent)	6.25%	6.25%	6.25%
Long-term rate of increase in compensation levels (as a percent)	4.00%	4.00%	4.00%
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	$ 227
Fair value of plan assets at end of year	182	$ 227
Expected future benefit payments
2023	44
2024	17
2025	11
2026	15
2027	14
Next five years after year five	78
Accumulated benefit obligation	247	319
Defined benefit pension plan | Level 1
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	182	227
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	227
Fair value of plan assets at end of year	$ 182	227
Defined benefit pension plan | Equity Securities
Target allocation and pension plan asset allocation
Target Allocations (as a percent)	80.00%
Defined benefit pension plan | Domestic equity securities
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	$ 84	113
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	113
Fair value of plan assets at end of year	84	113
Defined benefit pension plan | Domestic equity securities | Level 1
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	84	113
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	113
Fair value of plan assets at end of year	84	113
Defined benefit pension plan | Foreign equity securities
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	60	71
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	71
Fair value of plan assets at end of year	60	71
Defined benefit pension plan | Foreign equity securities | Level 1
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	60	71
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	71
Fair value of plan assets at end of year	$ 60	71
Defined benefit pension plan | Fixed income
Target allocation and pension plan asset allocation
Target Allocations (as a percent)	20.00%
Estimated fair value of plan assets	$ 26	29
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	29
Fair value of plan assets at end of year	26	29
Defined benefit pension plan | Fixed income | Level 1
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	26	29
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	29
Fair value of plan assets at end of year	26	29
Defined benefit pension plan | International fixed income mutual funds
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	11	12
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	12
Fair value of plan assets at end of year	11	12
Defined benefit pension plan | International fixed income mutual funds | Level 1
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	11	12
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	12
Fair value of plan assets at end of year	11	12
Defined benefit pension plan | Money market funds
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	1	2
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	2
Fair value of plan assets at end of year	1	2
Defined benefit pension plan | Money market funds | Level 1
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	1	2
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	2
Fair value of plan assets at end of year	$ 1	$ 2
Defined benefit pension plan | Minimum
Weighted-average assumptions
Discount rate used to determine obligations (as a percent)	5.30%	1.20%	0.70%
Discount rate used to determine net periodic benefit cost (as a percent)	1.20%	0.70%	2.15%
Defined benefit pension plan | Maximum
Weighted-average assumptions
Discount rate used to determine obligations (as a percent)	5.40%	2.90%	2.60%
Discount rate used to determine net periodic benefit cost (as a percent)	2.90%	2.60%	3.50%