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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$191 $188 $181 
Variable lease cost12 11 10 
Total$203 $199 $191 
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$194 $185 $183 
Right-of-use assets obtained in exchange for lease obligations:
Operating leases$158 $113 $182 
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 Term13 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$171 
2025163 
2026131 
2027108 
202888 
Thereafter679 
Total lease payments1
$1,340 
Less: Imputed interest374 
Present value of lease liabilities$966 
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$101 $93 $83 
Maturities of expected lease revenues
The maturities of expected lease payments to be received are as follows:
 Operating Leases
(Dollars in millions)
2024$80 
202571 
202654 
202736 
202821 
Thereafter20 
Total future lease maturities$282