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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$188 $181 $171 
Variable lease cost11 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 31,202220212020
(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 31,20222021
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$166 
2024163 
2025138 
2026106 
202784 
Thereafter654 
Total lease payments1
$1,311 
Less: Imputed interest335 
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 31,202220212020
(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 
202474 
202556 
202638 
202720 
Thereafter27 
Total future lease maturities$296