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Leases (Tables) | 12 Months Ended
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Dec. 31, 2022
Leases [Abstract] |
Components of lease expense | The following table shows the components of lease cost included in the Consolidated Statement of Operations:
Year Ended December 31, | 2022 |  | 2021 |  | 2020
(Dollars in millions) |  |  |  |  |
Operating lease cost | $ | 188 |  |  | $ | 181 |  |  | $ | 171 |
Variable lease cost | 11 |  |  | 10 |  |  | 10 |
Total | $ | 199 |  |  | $ | 191 |  |  | $ | 181 |
Supplemental cash flow information related to leases | The following table shows supplemental cash flow information related to lease activities:
Year Ended December 31, | 2022 |  | 2021 |  | 2020
(Dollars in millions) |  |  |  |  |
Cash paid for amounts included in the measurement of lease liabilities: |  |  |  |  |
Operating cash flows from operating leases | $ | 185 |  |  | $ | 183 |  |  | $ | 169 |
Right-of-use assets obtained in exchange for lease obligations: |  |  |  |  |
Operating leases | $ | 113 |  |  | $ | 182 |  |  | $ | 155 |
Schedule of weighted average remaining lease term and weighted average discount rate related to leases | The table below shows a weighted-average analysis for lease terms and discount rates for operating leases:
December 31, | 2022 |  | 2021
Weighted Average Remaining Lease Term | 12 years |  | 12 years
Weighted Average Discount Rate | 3.9 | % |  | 3.8 | %
Maturities of lease liabilities | The maturities of lease liabilities are as follows:
| Operating Leases |  |  |
(Dollars in millions) |  |  |  |
2023 | $ | 166 |  |  |  |
2024 | 163 |  |  |  |
2025 | 138 |  |  |  |
2026 | 106 |  |  |  |
2027 | 84 |  |  |  |
Thereafter | 654 |  |  |  |
Total lease payments 1 | $ | 1,311 |  |  |  |
Less: Imputed interest | 335 |  |  |  |
Present value of lease liabilities | $ | 976 |  |  |  |
1 Lease payments exclude $41 million of legally binding lease payments for leases signed but not yet commenced.
Lease income | The following table shows the components of lease income which are included in Service revenues in the Consolidated Statement of Operations:
Year Ended December 31, | 2022 |  | 2021 |  | 2020
(Dollars in millions) |  |  |  |  |
Operating lease income | $ | 93 |  |  | $ | 83 |  |  | $ | 77 |
Maturities of expected lease revenues | The maturities of expected lease payments to be received are as follows:
| Operating Leases
(Dollars in millions) |
2023 | $ | 81 |
2024 | 74 |
2025 | 56 |
2026 | 38 |
2027 | 20 |
Thereafter | 27 |
Total future lease maturities | $ | 296 |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 + Details
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- Definition Tabular disclosure of maturity of undiscounted cash flows to be received by lessor on annual basis for operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 12 -URI https://asc.fasb.org/extlink&oid=124258985&loc=SL77919396-209981 + Details
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- Definition Tabular disclosure of components of income from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124258985&loc=SL77919372-209981 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 6A -URI https://asc.fasb.org/extlink&oid=126900988&loc=SL77927221-108306 + Details
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