Employee Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Target allocation and pension plan asset allocation
Contributions made to defined benefit pension plans	$ 20	$ 38
Estimated fair value of plan assets	227	206	$ 185
Reconciliation of benefit obligation:
Benefit obligation at beginning of year	379	348
Service cost	10	9	8
Interest cost	9	11	12
Actuarial losses	(10)	58
Plan settlements	(19)	(38)
Benefits paid	(7)	(9)
Benefit obligation at end of year	362	379	348
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	206	185
Actual return on plan assets	27	27
Employer contributions	20	38
Plan settlements	(19)	(38)
Benefits paid	(7)	(6)
Fair value of plan assets at end of year	227	206	185
Funded status	(135)	(173)
Components of net periodic benefit cost:
Service cost	10	9	8
Interest cost	9	11	12
Expected return on plan assets	(12)	(11)	(10)
Amortization	9	7	5
Settlement loss recognized	6	11	2
Net periodic benefit cost	22	27	17
Amounts not reflected in net periodic benefit cost and included in accumulated other comprehensive loss (AOCL) before taxes
Total accumulated other comprehensive loss	71	112
Other disclosures
Pension distribution		32
Contribution expense			1
Estimated withdrawal liability			$ 14
Time period over which quarterly installment payments will be made			20 years
Defined benefit pension plan
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	$ 227	$ 206
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	$ 206
Fair value of plan assets at end of year	227	$ 206
Expected future benefit payments
2022	26
2023	25
2024	16
2025	11
2026	15
Next five years after year five	76
Accumulated benefit obligation	319	336
Defined benefit pension plan | Level 1
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	227	206
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	206
Fair value of plan assets at end of year	$ 227	206
Defined benefit pension plan | Domestic equity securities
Target allocation and pension plan asset allocation
Target Allocations (as a percent)	50.00%
Estimated fair value of plan assets	$ 113	93
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	93
Fair value of plan assets at end of year	113	93
Defined benefit pension plan | Domestic equity securities | Level 1
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	113	93
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	93
Fair value of plan assets at end of year	$ 113	93
Defined benefit pension plan | Foreign equity securities
Target allocation and pension plan asset allocation
Target Allocations (as a percent)	25.00%
Estimated fair value of plan assets	$ 71	64
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	64
Fair value of plan assets at end of year	71	64
Defined benefit pension plan | Foreign equity securities | Level 1
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	71	64
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	64
Fair value of plan assets at end of year	$ 71	64
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	$ 29	32
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	32
Fair value of plan assets at end of year	29	32
Defined benefit pension plan | Fixed income | Level 1
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	29	32
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	32
Fair value of plan assets at end of year	29	32
Defined benefit pension plan | International fixed income mutual funds
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	12	15
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	15
Fair value of plan assets at end of year	12	15
Defined benefit pension plan | International fixed income mutual funds | Level 1
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	12	15
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	15
Fair value of plan assets at end of year	12	15
Defined benefit pension plan | Money market funds
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	2	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	2	2
Defined benefit pension plan | Money market funds | Level 1
Target allocation and pension plan asset allocation
Estimated fair value of plan assets	2	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	$ 2	$ 2
Defined benefit pension plan | Alternative investments
Target allocation and pension plan asset allocation
Target Allocations (as a percent)	5.00%
Defined benefit pension plan | Minimum
Weighted-average assumptions
Discount rate used to determine obligations (as a percent)	1.20%	0.70%	2.15%
Discount rate used to determine net periodic benefit cost (as a percent)	0.70%	2.15%	3.50%
Defined benefit pension plan | Maximum
Weighted-average assumptions
Discount rate used to determine obligations (as a percent)	2.90%	2.60%	3.50%
Discount rate used to determine net periodic benefit cost (as a percent)	2.60%	3.50%	4.50%