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Supplemental Balance Sheet Information (Tables) | 3 Months Ended
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Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Supplemental Balance Sheet Information |
|  | As of March 31, 2024 |  |  | As of December 31, 2023 |
|  | (In millions of dollars) |
Trade Receivables, Net |  |  |  |  |  |
Billed trade receivables |  | $ | 342.0 |  |  | $ | 325.8 |
Allowance for doubtful receivables |  |  | (0.6 | ) |  |  | (0.6 | )
Trade receivables, net |  | $ | 341.4 |  |  | $ | 325.2 |
Inventories 1 |  |  |  |  |  |
Finished products |  | $ | 81.0 |  |  | $ | 89.3 |
Work-in-process |  |  | 209.5 |  |  |  | 210.8 |
Raw materials |  |  | 165.0 |  |  |  | 161.5 |
Operating supplies |  |  | 15.8 |  |  |  | 15.6 |
Inventories |  | $ | 471.3 |  |  | $ | 477.2 |
Property, Plant and Equipment, Net |  |  |  |  |  |
Land and improvements |  | $ | 37.2 |  |  | $ | 38.0 |
Buildings and leasehold improvements |  |  | 240.0 |  |  |  | 238.4 |
Machinery and equipment |  |  | 1,272.8 |  |  |  | 1,265.3 |
Construction in progress |  |  | 193.8 |  |  |  | 173.7 |
Property, plant and equipment, gross |  |  | 1,743.8 |  |  |  | 1,715.4 |
Accumulated depreciation and amortization |  |  | (690.3 | ) |  |  | (663.7 | )
Land held for sale |  |  | 1.5 |  |  |  | 0.4 |
Property, plant and equipment, net |  | $ | 1,055.0 |  |  | $ | 1,052.1 |
Other Assets |  |  |  |  |  |
Assets to be conveyed associated with Warrick acquisition |  | $ | 56.8 |  |  | $ | 56.8 |
Restricted cash – Note 12 |  |  | 18.3 |  |  |  | 18.3 |
Long-term replacement parts |  |  | 17.2 |  |  |  | 16.7 |
Other |  |  | 25.8 |  |  |  | 25.9 |
Other assets |  | $ | 118.1 |  |  | $ | 117.7 |
Other Accrued Liabilities |  |  |  |  |  |
Uncleared cash disbursements |  | $ | 16.8 |  |  | $ | 15.7 |
Accrued income taxes and other taxes payable |  |  | 13.1 |  |  |  | 9.5 |
Accrued annual contribution to Salaried VEBA |  |  | — |  |  |  | 1.1 |
Accrued interest |  |  | 10.3 |  |  |  | 9.9 |
Short-term environmental accrual – Note 7 |  |  | 0.5 |  |  |  | 2.8 |
Current operating lease liabilities |  |  | 7.7 |  |  |  | 8.0 |
Current finance lease liabilities |  |  | 2.3 |  |  |  | 2.1 |
Other – Note 5 |  |  | 14.7 |  |  |  | 15.2 |
Other accrued liabilities |  | $ | 65.4 |  |  | $ | 64.3 |
Long-Term Liabilities |  |  |  |  |  |
Workers' compensation accrual |  | $ | 29.2 |  |  | $ | 29.9 |
Long-term environmental accrual – Note 7 |  |  | 15.6 |  |  |  | 14.2 |
Other long-term liabilities |  |  | 38.8 |  |  |  | 37.6 |
Long-term liabilities |  | $ | 83.6 |  |  | $ | 81.7 |
1. At March 31, 2024 and December 31, 2023, the current cost of our inventory exceeded its stated last-in, first-out (“LIFO”) value by $42.6 million and $56.0 million, respectively.

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- Definition Tabular disclosure of condensed balance sheet, including, but not limited to, balance sheets of consolidated entities and consolidation eliminations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 04 -Paragraph (a) -Publisher SEC Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3 + Details
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