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Leases (Tables)
 12 Months Ended
Dec. 31, 2023
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 31,202320222021
(Dollars in millions)
Operating lease cost$207 $206 $198 
Variable lease cost13 12 10 
Total$220 $218 $208 
Supplemental cash flow information related to leases
The following table shows supplemental cash flow information related to lease activities:
Year Ended December 31,202320222021
(Dollars in millions)
Cash paid for amounts included in the measurement of lease liabilities: 
Operating cash flows from operating leases$213 $204 $204 
Right-of-use assets obtained in exchange for lease obligations:
Operating leases$168 $125 $188 
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 31,20232022
Weighted Average Remaining Lease Term12 years12 years
Weighted Average Discount Rate4.3 %3.9 %
Maturities of lease liabilities
The maturities of lease liabilities are as follows:
 Operating Leases
(Dollars in millions)
2024$187 
2025178 
2026143 
2027120 
202897 
Thereafter696 
Total lease payments1
$1,421 
Less: Imputed interest384 
Present value of lease liabilities$1,037 
1    Lease payments exclude $28 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 31,202320222021
(Dollars in millions)
Operating lease income$127 $120 $109 
Maturities of expected lease revenues
The maturities of expected lease payments to be received are as follows:
 Operating Leases
(Dollars in millions)
2024$97 
202588 
202667 
202737 
202822 
Thereafter25 
Total future lease maturities$336