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Employee Benefits
 6 Months Ended
Jun. 30, 2024
Retirement Benefits [Abstract]  
Employee Benefits
15. Employee Benefits

Pension Plans

The components of net pension cost (benefit) for all funded and unfunded plans are recorded in Other expense and are summarized in the following table. For more information on our Pension Plans and Other Postretirement Benefit Plans, see Note 18 (“Employee Benefits”) beginning on page 162 of our 2023 Form 10-K.
 Three months ended June 30,Six months ended June 30,
Dollars in millions2024202320242023
Interest cost on PBO$10 $11 $20 $22 
Expected return on plan assets(9)(10)(19)(21)
Amortization of losses2 2 5 5 
Settlement loss— — — — 
Net pension cost$3 $3 $6 $6