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Other Income - Net
 12 Months Ended
Dec. 31, 2025
Other Income and Expenses [Abstract]  
Other Income - Net Other Income - Net
The Company derives income from items that are not considered operating activities. Income from these items is reported net of related expense. All components of net periodic pension and post-retirement benefit costs, excluding service cost, are included in other income - net on the consolidated income statement. Miscellaneous income (expense) may fluctuate due to timing and includes investment gains and losses, interest income and other non-operating activities. 

For more information about the drivers of changes in net periodic pension and post-retirement benefit credit from 2024 to 2025 and from 2023 to 2024, refer to Note 9, Employee Benefit Plans. Interest income decreased from 2024 to 2025 primarily as a result of lower average investment balances. Interest income increased from 2023 to 2024 primarily as a result of higher average interest rates. Other income – net consisted of the following:
 Years Ended
(Dollars in Millions)202520242023
Net Periodic Pension and Post-retirement Benefit Credit (a)
$33 $50 $29 
Interest Income45 85 79 
Miscellaneous Income14 7 31 
Total Other Income - Net$92 $142 $139 
(a) Excludes the service cost component of net periodic benefit cost.