Company: CENX
Filing Date: 2025-05-08
Form Type: 10-Q
Source: 0000949157-25-000035
Chunk: 25

Company: CENTURY ALUMINUM CO
Filing Date: 2025-05-08
Form: 10-Q
Item: Part I, Item 1
Chunk 25
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Table of ContentsCENTURY ALUMINUM COMPANYCondensed Notes to the Consolidated Financial Statements (continued)(amounts in millions, except share and per share amounts)(Unaudited)

The following table summarizes the changes in the accumulated balances for each component of AOCL:Defined benefit plan and other postretirement liabilitiesUnrealized gain on financial instrumentsTotal, net of taxBalance, December 31, 2024$(104.6)$1.3 $(103.3)Other comprehensive loss before reclassifications— — — Net amount reclassified to net income (loss)$1.7 $— $1.7 Balance, March 31, 2025$(102.9)$1.3 $(101.6)Balance, December 31, 2023$(99.4)$1.5 $(97.9)Other comprehensive loss before reclassifications$(3.4)— $(3.4)Net amount reclassified to net income (loss)1.8 (0.1)1.7 Balance, March 31, 2024$(101.0)$1.4 $(99.6)Reclassifications out of AOCL were included in the Consolidated Statements of Operations as follows:Three months endedMarch 31,AOCL ComponentsLocation20252024Defined benefit plan and other postretirement liabilitiesCost of goods sold$0.8 $0.9 Selling, general and administrative expenses0.2 0.2 Other operating expense - net0.7 0.7 Income tax effect— — Net of tax$1.7 $1.8 Unrealized gain on financial instrumentsCost of goods sold$— $(0.1)Income tax effect— — Net of tax$— $(0.1)

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Table of ContentsCENTURY ALUMINUM COMPANYCondensed Notes to the Consolidated Financial Statements (continued)(amounts in millions, except share and per share amounts)(Unaudited)

7.    Components of Net Periodic Benefit CostPension BenefitsThree months endedMarch 31,20252024Service cost$0.7 $0.6 Interest cost3.3 3.5 Expected return on plan assets(3.9)(3.8)Amortization of prior service costs0.1 0.1 Amortization of net loss1.4