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Leases (Tables) | 12 Months Ended
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Dec. 31, 2023
Leases [Abstract] |
Lease cost | Lease expense consisted of the following:
| Years Ended December 31,
| 2023 |  | 2022 |  | 2021
| (Dollars in millions)
Operating and short-term lease cost | $ | 26 |  |  | 25 |  |  | 26 |
Finance lease cost: |  |  |  |  |
Amortization of right-of-use assets | 1 |  |  | 1 |  |  | 1 |
Total finance lease cost | 1 |  |  | 1 |  |  | 1 |
Total lease cost | $ | 27 |  |  | 26 |  |  | 27 |
Supplemental consolidated cash flow statement information related to leases is included below:
| Years Ended December 31,
| 2023 |  | 2022
| (Dollars in millions)
Cash paid for amounts included in the measurement of lease liabilities: |  |  |
Operating cash flows for operating leases | $ | 35 |  |  | 40 |
Operating cash flows for finance leases | — |  |  | — |
Financing cash flows for finance leases | 2 |  |  | 1 |
Supplemental lease cash flow disclosures |  |  |
Operating lease right-of-use assets obtained in exchange for new operating lease liabilities | $ | 15 |  |  | 23 |
Right-of-use assets obtained in exchange for new finance lease liabilities | 3 |  |  | 1 |
Assets and liabilities | Supplemental consolidated balance sheet information and other information related to leases is included below:
|  | As of December 31,
Leases (Dollars in millions) | Classification on the Balance Sheet | 2023 |  | 2022
Assets |  |  |  |
Operating lease assets | Other, net | $ | 65 |  |  | 68 |
Finance lease assets | Property, plant and equipment, net of accumulated depreciation | 7 |  |  | 5 |
Total leased assets | $ | 72 |  |  | 73 |
Liabilities |  |  |  |
Current |  |  |  |
Operating | Other | $ | 20 |  |  | 21 |
Finance | Current maturities of long-term debt | 1 |  |  | 2 |
Noncurrent |  |  |  |
Operating | Other | 47 |  |  | 58 |
Finance | Long-term debt | 3 |  |  | 2 |
Total lease liabilities | $ | 71 |  |  | 83 |
Weighted-average remaining lease term (years) |  |  |
Operating leases |  | 4.9 |  | 4.8
Finance leases |  | 7.7 |  | 10.0
Weighted-average discount rate |  |  |
Operating leases |  | 4.83 | % |  | 4.08 | %
Finance leases |  | 5.89 | % |  | 4.08 | %
Maturities of Operating lease liabilities | As of December 31, 2023, maturities of lease liabilities were as follows:
| Operating Leases |  | Finance Leases
| (Dollars in millions)
2024 | $ | 22 |  |  | 1 |
2025 | 16 |  |  | 1 |
2026 | 11 |  |  | 1 |
2027 | 9 |  |  | 1 |
2028 | 5 |  |  | — |
Thereafter | 11 |  |  | 1 |
Total lease payments | 74 |  |  | 5 |
Less: interest | (7) |  |  | (1) |
Total | 67 |  |  | 4 |
Less: current portion | (20) |  |  | (1) |
Long-term portion | $ | 47 |  |  | 3 |

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- Definition Assets And Liabilities, Lessee [Table Text Block] + References No definition available. + 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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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-6 + Details
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