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Leases (Tables)
 12 Months Ended
Dec. 31, 2024
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 31,202420232022
(Dollars in millions)
Operating lease cost$198 $191 $188 
Variable lease cost13 12 11 
Total$211 $203 $199 
Supplemental cash flow information related to leases
The following table shows supplemental cash flow information related to lease activities:
Year Ended December 31,202420232022
(Dollars in millions)
Cash paid for amounts included in the measurement of lease liabilities: 
Operating cash flows from operating leases$207 $194 $185 
Right-of-use assets obtained in exchange for lease obligations:
Operating leases$175 $158 $113 
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 31,20242023
Weighted Average Remaining Lease Term13 years13 years
Weighted Average Discount Rate4.7 %4.3 %
Maturities of lease liabilities
The maturities of lease liabilities are as follows:
 Operating Leases
(Dollars in millions)
2025$182 
2026155 
2027132 
2028111 
202983 
Thereafter711 
Total lease payments1
$1,374 
Less: Imputed interest411 
Present value of lease liabilities$963 
1    Lease payments exclude $27 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 31,202420232022
(Dollars in millions)
Operating lease income$103 $101 $93 
Maturities of expected lease revenues
The maturities of expected lease payments to be received are as follows:
 Operating Leases
(Dollars in millions)
2025$87 
202678 
202760 
202846 
202926 
Thereafter14 
Total future lease maturities$311