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Other Income - Net (Tables)
 12 Months Ended
Dec. 31, 2023
Other Income and Expenses [Abstract]  
Schedule of Other Income - Net Other income – net consisted of the following:
 Years Ended
(Dollars in Millions)202320222021
Net Periodic Pension and Post-retirement Benefit Credit (a)
$29 $79 $64 
Interest Income79 42 7 
Miscellaneous Income31 12 8 
Total Other Income - Net$139 $133 $79 
(a) Excludes the service cost component of net periodic benefit cost.