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Employee Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2025
Retirement Benefits [Abstract]  
Schedule of Contributions to Plans
Contributions to our plans were as follows:
 Quarter Ended September 30,Nine Months Ended September 30,
(dollars in millions)2025202420252024
U.S. qualified defined benefit plans$ $— $ $— 
International defined benefit plans1 15 18 
PRB plans7 18 19 
Defined contribution plans316 308 1,057 1,042 
Schedule of Amounts Recognized in the Balance Sheet
The amounts recognized in the Condensed Consolidated Balance Sheet consist of:
(dollars in millions)September 30, 2025December 31, 2024
Non-current pension assets (included in Other assets)$2,659 $1,819 
Current pension and PRB liabilities (included in Accrued employee compensation)257 256 
Future pension and postretirement benefit obligations1,981 2,104 
The amounts recognized in Future pension and postretirement benefit obligations consist of:
(dollars in millions)September 30, 2025December 31, 2024
Non-current pension liabilities$1,434 $1,532 
Non-current PRB liabilities480 523 
Other pension and PRB related items67 49 
Future pension and postretirement benefit obligations$1,981 $2,104 
Schedule of Net Periodic Costs (Income)
The components of net periodic income for our defined pension plans were as follows:
 
Quarter Ended September 30,
Nine Months Ended September 30,
(dollars in millions)2025202420252024
Operating expense
Service cost$42 $47 $126 $141 
Non-operating expense
Interest cost587 597 1,756 1,789 
Expected return on plan assets(922)(937)(2,760)(2,810)
Amortization of prior service credit(32)(42)(107)(127)
Recognized actuarial net loss5 15 15 
 Net settlement, curtailment, and special termination benefit loss 14 — 
Non-service pension income(362)(373)(1,082)(1,133)
Total net periodic pension income$(320)$(326)$(956)$(992)
Schedule of Marketable Securities The fair value of marketable securities held in trusts was as follows:
(dollars in millions)September 30, 2025December 31, 2024
Marketable securities held in trusts$713 $786