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RETIREMENT BENEFIT PLANS
 3 Months Ended
Mar. 31, 2026
Retirement Benefits [Abstract]  
RETIREMENT BENEFIT PLANS RETIREMENT BENEFIT PLANS
The Company has defined benefit pension plans and other postemployment benefit plans covering eligible salaried and hourly employees and their dependents. The Company expects to contribute a total of approximately $25 million into its defined benefit pension plans during 2026, of which $6 million has been contributed through the three months ended March 31, 2026. The other postemployment benefit plans, which provide medical and life insurance benefits, are funded on a pay-as-you-go basis.

The components of net periodic benefit expense recorded in the Condensed Consolidated Statements of Operations are as follows:
 Pension benefits
(in millions)20262025
Three Months Ended March 31,USNon-USUSNon-US
Service cost$— $4 $— $3 
Interest cost1 5 1 5 
Expected return on plan assets(1)(5)(1)(4)
Amortization of unrecognized loss1 1 1 1 
Net periodic benefit cost$1 $5 $1 $5 

The components of net periodic benefit expense other than the service cost component are included in Other postretirement expense in the Condensed Consolidated Statements of Operations.
In August 2025, the Company executed an amendment to the plan document of one of the Company’s U.S. defined benefit pension plans (“U.S. Pension Plan”) to terminate the plan effective October 31, 2025. The termination of the U.S. Pension Plan is expected to take twelve to eighteen months to complete. As part of the termination process, the Company expects to settle benefit obligations under the U.S. Pension Plan through a combination of lump sum payments to eligible plan participants and the purchase of a group annuity contract, under which future benefit obligations and administration will be transferred to a third-party insurance company. Such settlements will be funded primarily from plan assets. At December 31, 2025, the projected benefit obligation of the U.S. Pension Plan exceeded the fair value of the plan’s assets by $4 million under U.S. GAAP.

In December 2024, the Company entered into a second buy-in contract (the first buy-in contract was entered into in 2019) with an insurance company related to its U.K. pension plan. Pursuant to this agreement, the Company liquidated approximately $50 million of pension plan assets to invest in an insurance annuity. At December 31, 2025, the U.K. pension plan had plan assets of $131 million, all held by the insurance company. The projected benefit obligation of the U.K. pension plan at December 31,
2025 was $104 million under U.S. GAAP. The U.K. pension plan was overfunded by $27 million as of December 31, 2025, under U.S. GAAP.