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Leases (Tables)
12 Months Ended
Dec. 31, 2023
Leases [Abstract]  
Lease cost
Lease expense consisted of the following:
Years Ended December 31,
202320222021
(Dollars in millions)
Operating and short-term lease cost$26 25 26 
Finance lease cost:
Amortization of right-of-use assets
Total finance lease cost
Total lease cost$27 26 27 
Supplemental consolidated cash flow statement information related to leases is included below:
Years Ended December 31,
20232022
(Dollars in millions)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases$35 40 
Operating cash flows for finance leases— — 
Financing cash flows for finance leases
Supplemental lease cash flow disclosures
Operating lease right-of-use assets obtained in exchange for new operating lease liabilities$15 23 
Right-of-use assets obtained in exchange for new finance lease liabilities
Assets and liabilities
Supplemental consolidated balance sheet information and other information related to leases is included below:
As of December 31,
Leases (Dollars in millions)Classification on the Balance Sheet20232022
Assets
Operating lease assetsOther, net$65 68 
Finance lease assetsProperty, plant and equipment, net of accumulated depreciation
Total leased assets$72 73 
Liabilities
Current
OperatingOther$20 21 
FinanceCurrent maturities of long-term debt
Noncurrent
OperatingOther47 58 
FinanceLong-term debt
Total lease liabilities$71 83 
Weighted-average remaining lease term (years)
Operating leases4.94.8
Finance leases7.710.0
Weighted-average discount rate
Operating leases4.83 %4.08 %
Finance leases5.89 %4.08 %
Maturities of Operating lease liabilities
As of December 31, 2023, maturities of lease liabilities were as follows:
Operating LeasesFinance Leases
(Dollars in millions)
2024$22 
202516 
202611 
2027
2028— 
Thereafter11 
Total lease payments74 
Less: interest(7)(1)
Total67 
Less: current portion(20)(1)
Long-term portion$47