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Supplemental Balance Sheet Information | 12 Months Ended
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Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Supplemental Balance Sheet Information | Supplemental Balance Sheet Information
|  | December 31, 2016 |  | December 31, 2015
|  | (In millions of dollars)
Cash and Cash Equivalents |  |  |  |
Cash and money market funds |  | $ | 37.9 |  |  | $ | 40.3 |
Commercial paper |  | 17.3 |  |  | 32.2 |
Total |  | $ | 55.2 |  |  | $ | 72.5 |
Trade Receivables – Net |  |  |  |
Billed trade receivables |  | $ | 138.2 |  |  | $ | 116.8 |
Unbilled trade receivables |  | 0.3 |  |  | 0.7 |
Trade receivables, gross |  | 138.5 |  |  | 117.5 |
Allowance for doubtful receivables |  | (0.8 | ) |  | (0.8 | )
Trade receivables – net |  | $ | 137.7 |  |  | $ | 116.7 |
Inventories |  |  |  |
Finished products |  | $ | 73.8 |  |  | $ | 79.5 |
Work-in-process |  | 71.7 |  |  | 63.6 |
Raw materials |  | 51.1 |  |  | 53.4 |
Operating supplies 1 |  | 5.0 |  |  | 23.1 |
Total |  | $ | 201.6 |  |  | $ | 219.6 |
|  | December 31, 2016 |  | December 31, 2015
|  | (In millions of dollars)
Prepaid Expenses and Other Current Assets |  |  |  |
Current replacement parts 1 |  | $ | 7.6 |  |  | $ | — |
Current derivative assets – Note 10 |  | 5.0 |  |  | 1.5 |
Current deferred tax assets – Note 1 |  | — |  |  | 49.6 |
Prepaid insurance |  | 1.9 |  |  | 1.9 |
Short-term restricted cash |  | 0.3 |  |  | 0.3 |
Other |  | 3.7 |  |  | 3.4 |
Total |  | $ | 18.5 |  |  | $ | 56.7 |
Property, Plant and Equipment – Net |  |  |  |
Land and improvements |  | $ | 22.7 |  |  | $ | 22.7 |
Buildings and leasehold improvements |  | 88.6 |  |  | 71.8 |
Machinery and equipment |  | 615.1 |  |  | 549.0 |
Construction in progress |  | 34.8 |  |  | 48.5 |
Property, plant and equipment – gross |  | 761.2 |  |  | 692.0 |
Accumulated depreciation |  | (230.6 | ) |  | (196.9 | )
Assets held for sale |  | 0.3 |  |  | 0.3 |
Property, plant and equipment – net |  | $ | 530.9 |  |  | $ | 495.4 |
Other Assets |  |  |  |
Restricted cash |  | $ | 12.2 |  |  | $ | 10.9 |
Long-term replacement parts 1 |  | 11.2 |  |  | — |
Debt issuance costs on Revolving Credit Facility |  | 1.0 |  |  | 1.3 |
Deferred compensation plan assets |  | 8.2 |  |  | 7.3 |
Derivative assets – Note 10 |  | 0.8 |  |  | 0.1 |
Total |  | $ | 33.4 |  |  | $ | 19.6 |
Other Accrued Liabilities |  |  |  |
Current derivative liabilities – Note 10 |  | $ | 0.8 |  |  | $ | 14.1 |
Uncleared cash disbursements |  | 5.8 |  |  | 8.0 |
Accrued income taxes and other taxes payable |  | 4.3 |  |  | 3.1 |
Accrued annual contribution to VEBAs – Note 6 |  | 20.0 |  |  | 19.6 |
Short-term environmental accrual – Note 9 |  | 1.4 |  |  | 1.6 |
Accrued interest |  | 2.9 |  |  | 1.5 |
Short-term deferred revenue |  | 0.2 |  |  | 1.2 |
Other |  | 4.5 |  |  | 3.6 |
Total |  | $ | 39.9 |  |  | $ | 52.7 |
|  | December 31, 2016 |  | December 31, 2015
|  | (In millions of dollars)
Long-Term Liabilities |  |  |  |
Derivative liabilities – Note 10 |  | $ | 1.0 |  |  | $ | 2.1 |
Income tax liabilities |  | 0.9 |  |  | 0.7 |
Workers’ compensation accruals |  | 25.0 |  |  | 21.7 |
Long-term environmental accrual – Note 9 |  | 15.8 |  |  | 17.0 |
Long-term asset retirement obligations |  | 5.3 |  |  | 4.8 |
Long-term deferred revenue – Note 1 |  | 0.1 |  |  | 0.3 |
Deferred compensation liability |  | 8.2 |  |  | 7.7 |
Long-term capital leases |  | 0.2 |  |  | 0.1 |
Long-term portion of contingent contribution to Union VEBA – Note 6 |  | 12.8 |  |  | 29.9 |
Other long-term liabilities |  | 3.9 |  |  | 3.2 |
Total |  | $ | 73.2 |  |  | $ | 87.5 |
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1. | As replacement parts have become more significant due to our recent major investments in machinery and equipment, we have reclassified a portion of other inventories as of December 31, 2016 to other current and other long-term assets based on expected utilization of the replacement parts.

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