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Leases (Tables)
 12 Months Ended
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 31,202220212020
(Dollars in millions)
Operating lease cost$206 $198 $184 
Variable lease cost12 10 11 
Total$218 $208 $195 
Supplemental cash flow information related to leases The following table shows supplemental cash flow information related to lease activities:
Year Ended December 31,202220212020
(Dollars in millions)
Cash paid for amounts included in the measurement of lease liabilities: 
Operating cash flows from operating leases$204 $204 $188 
Right-of-use assets obtained in exchange for lease obligations:
Operating leases$125 $188 $157 
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 31,20222021
Weighted Average Remaining Lease Term12 years12 years
Weighted Average Discount Rate3.9 %3.8 %
Maturities of lease liabilities
The maturities of lease liabilities are as follows:
 Operating Leases
(Dollars in millions)
2023$182 
2024178 
2025150 
2026116 
202794 
Thereafter681 
Total lease payments1
$1,401 
Less: Imputed interest347 
Present value of lease liabilities$1,054 
1    Lease payments exclude $42 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 31,202220212020
(Dollars in millions)
Operating lease income$120 $109 $105 
Maturities of expected lease revenues The maturities of expected lease payments to be received are as follows:
 Operating Leases
(Dollars in millions)
2023$98 
202490 
202572 
202640 
202721 
Thereafter39 
Total future lease maturities$360