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Leases (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Leases [Abstract] |
Lease, Right Of-Use Assets And Liabilities | ROU Assets and Lease Liabilities
| As of December 31,
| 2024 |  | 2023
| (dollars in millions)
ROU assets | $ | 60 |  | $ | 71
Lease liabilities | $ | 84 |  | $ | 97
Weighted average discount rate | 2.65% |  | 2.60%
Weighted average remaining lease term (in years) | 7.1 |  | 7.8
Summary of Lease Expense and Other Information | Lease Expense and Other Information
|  | Year Ended December 31,
|  | 2024 |  | 2023 |  | 2022
|  | (in millions)
Operating lease costs (1) |  | $ | 14 |  |  | $ | 20 |  |  | $ | 16 |
Variable and short-term lease costs |  | 2 |  |  | 2 |  |  | 3 |
Sublease income |  | (3) |  |  | (7) |  |  | (7) |
Total lease costs |  | $ | 13 |  |  | $ | 15 |  |  | $ | 12 |
Cash paid for amounts included in the measurement of lease liabilities |  |  |  |  |  |
Operating cash outflows for operating leases |  | $ | 16 |  |  | $ | 24 |  |  | $ | 23 |
____________________ (1) Includes an ROU asset impairment of $2 million in 2024 and $3 million in 2023.
Future Minimum Rental Payments | Future Minimum Rental Payments Operating Leases
|  | As of December 31, 2024
Year |  | (in millions)
2025 |  | $ | 13 |
2026 |  | 13 |
2027 |  | 12 |
2028 |  | 12 |
2029 |  | 13 |
Thereafter |  | 29 |
Total lease payments |  | 92 |
Less: Imputed interest |  | 8 |
Total lease liabilities |  | $ | 84 |

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- Definition Tabular disclosure of contractual obligation by timing of payment due. Includes, but is not limited to, long-term debt obligation, lease obligation, and purchase obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 04 -Subparagraph (a) -Publisher SEC Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 + Details
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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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