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Employee Benefits (Tables)
6 Months Ended
Jun. 30, 2024
Retirement Benefits [Abstract]  
Benefit or (Income) Cost Related to Pension and Postretirement Health Care and Life Insurance
The following table summarizes the components of net periodic benefit cost (income) related to our pension and postretirement health care and life insurance plans:
(dollars in millions)
PensionHealth Care and Life
Three Months Ended June 30,2024202320242023
Service cost - Cost of services$39 $45 $11 $12 
Service cost - Selling, general and administrative expense6 2 
Service cost$45 $52 $13 $14 
Amortization of prior service cost (credit)$28 $28 $(32)$(104)
Expected return on plan assets(140)(253)(7)(8)
Interest cost112 188 136 136 
Remeasurement loss, net136 —  — 
Other components$136 $(37)$97 $24 
Total$181 $15 $110 $38 
(dollars in millions)
PensionHealth Care and Life
Six Months Ended June 30,2024202320242023
Service cost - Cost of services$80 $91 $22 $23 
Service cost - Selling, general and administrative expense13 14 4 
Service cost$93 $105 $26 $27 
Amortization of prior service cost (credit)$56 $56 $(64)$(209)
Expected return on plan assets(348)(506)(14)(15)
Interest cost269 376 271 272 
Remeasurement loss, net63 —  — 
Other components$40 $(74)$193 $48 
Total$133 $31 $219 $75