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Supplemental Balance Sheet Information | 3 Months Ended
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Mar. 31, 2022
Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Supplemental Balance Sheet Information | 2. Supplemental Balance Sheet Information
|  | As of March 31, 2022 |  |  | As of December 31, 2021 |
|  | (In millions of dollars) |
Trade Receivables, Net |  |  |  |  |  |  |  |
Billed trade receivables |  | $ | 432.8 |  |  | $ | 333.5 |
Allowance for doubtful receivables |  |  | (0.6 | ) |  |  | (0.8 | )
Trade receivables, net |  | $ | 432.2 |  |  | $ | 332.7 |
Inventories1 |  |  |  |  |  |  |  |
Finished products |  | $ | 83.7 |  |  | $ | 90.3 |
Work-in-process |  |  | 169.2 |  |  |  | 162.2 |
Raw materials |  |  | 169.0 |  |  |  | 143.0 |
Operating supplies |  |  | 9.6 |  |  |  | 9.1 |
Total |  | $ | 431.5 |  |  | $ | 404.6 |
Property, Plant and Equipment, Net |  |  |  |  |  |  |  |
Land and improvements |  | $ | 26.5 |  |  | $ | 26.0 |
Buildings and leasehold improvements |  |  | 182.5 |  |  |  | 179.0 |
Machinery and equipment |  |  | 1,160.4 |  |  |  | 1,151.5 |
Construction in progress2 |  |  | 89.8 |  |  |  | 75.3 |
Property, plant and equipment, gross |  |  | 1,459.2 |  |  |  | 1,431.8 |
Accumulated depreciation and amortization |  |  | (503.4 | ) |  |  | (480.4 | )
Assets held for sale |  |  | 4.4 |  |  |  | 3.8 |
Property, plant and equipment, net |  | $ | 960.2 |  |  | $ | 955.2 |
Other Accrued Liabilities |  |  |  |  |  |  |  |
Uncleared cash disbursements |  | $ | 16.7 |  |  | $ | 10.9 |
Accrued income taxes and other taxes payable |  |  | 16.3 |  |  |  | 9.5 |
Accrued interest |  |  | 10.3 |  |  |  | 9.9 |
Short-term environmental accrual – Note 6 |  |  | 2.3 |  |  |  | 2.6 |
Other – Note 4 |  |  | 25.3 |  |  |  | 25.5 |
Total |  | $ | 70.9 |  |  | $ | 58.4 |
Long-Term Liabilities |  |  |  |  |  |  |  |
Workers' compensation accrual |  | $ | 31.8 |  |  | $ | 31.9 |
Long-term environmental accrual – Note 6 |  |  | 14.1 |  |  |  | 14.2 |
Other long-term liabilities |  |  | 28.5 |  |  |  | 26.4 |
Total |  | $ | 74.4 |  |  | $ | 72.5 |
1 | At March 31, 2022 and December 31, 2021 the current cost of our inventory exceeded its stated last-in, first-out (“LIFO”) value by $210.5 million and $137.1 million, respectively.
2 | Based on market conditions, we temporarily idled projects within Construction in progress totaling $20.6 million and $24.9 million as of March 31, 2022 and December 31, 2021, respectively, all of which are expected to resume at a future date.

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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI http://asc.fasb.org/topic&trid=2122208 + Details
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