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Supplemental Balance Sheet Information (Tables) | 6 Months Ended
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Jun. 30, 2012
Supplemental Balance Sheet Information [Abstract] |
Trade Receivables |
| June 30, 2012 |  | December 31, 2011
Trade Receivables. |  |  |
Billed trade receivables | $ | 128.1 |  |  | $ | 98.9 |
Unbilled trade receivables – Note 1 | 4.1 |  |  | 0.9 |
Trade receivables, gross | 132.2 |  |  | 99.8 |
Allowance for doubtful receivables | (0.9 | ) |  | (0.9 | )
Trade receivables, net | $ | 131.3 |  |  | $ | 98.9 |
Inventories |
Inventories. |  |  |
Finished products | $ | 62.0 |  |  | $ | 75.9 |
Work in process | 66.8 |  |  | 57.5 |
Raw materials | 52.3 |  |  | 58.1 |
Operating supplies and repair and maintenance parts | 15.7 |  |  | 14.2 |
Total | $ | 196.8 |  |  | $ | 205.7 |
Prepaid Expenses and Other Current Assets |
Prepaid Expenses and Other Current Assets. |  |  |
Current derivative assets – Notes 10 and 11 | $ | 1.4 |  |  | $ | — |
Current deferred tax assets | 63.0 |  |  | 63.0 |
Current portion of option premiums paid – Notes 10 and 11 | 0.3 |  |  | 0.4 |
Short-term restricted cash | 0.9 |  |  | 7.8 |
Prepaid taxes | 3.0 |  |  | 3.8 |
Prepaid expenses | 6.1 |  |  | 3.9 |
Total | $ | 74.7 |  |  | $ | 78.9 |
Property, Plant and Equipment - Net |
Property, Plant and Equipment - Net. |  |  |
Land and improvements | $ | 22.6 |  |  | $ | 22.6 |
Buildings and leasehold improvements | 49.8 |  |  | 45.9 |
Machinery and equipment | 379.1 |  |  | 356.7 |
Construction in progress | 15.0 |  |  | 24.1 |
Active property, plant and equipment, gross | 466.5 |  |  | 449.3 |
Accumulated depreciation | (98.9 | ) |  | (86.9 | )
Active property, plant and equipment, net | 367.6 |  |  | 362.4 |
Idled equipment | 5.4 |  |  | 5.4 |
Total | $ | 373.0 |  |  | $ | 367.8 |
Other Assets |
Other Assets. |  |  |
Derivative assets – Notes 10 and 11 | $ | 42.0 |  |  | $ | 46.2 |
Option premiums paid – Notes 10 and 11 | 0.1 |  |  | 0.1 |
Restricted cash | 10.1 |  |  | 10.4 |
Long-term income tax receivable | 2.8 |  |  | 2.8 |
Deferred financing costs | 13.0 |  |  | 7.8 |
Available for sale securities | 5.5 |  |  | 4.9 |
Other | 0.3 |  |  | 0.1 |
Total | $ | 73.8 |  |  | $ | 72.3 |
Other Accrued Liabilities |
Other Accrued Liabilities. |  |  |
Current derivative liabilities – Notes 10 and 11 | $ | 13.5 |  |  | $ | 14.8 |
Current portion of option premiums received – Notes 10 and 11 | 0.1 |  |  | 0.1 |
Accrued book overdraft (uncleared cash disbursement) | 6.2 |  |  | — |
Taxes payable | 4.5 |  |  | 2.6 |
Accrued freight | 2.8 |  |  | 2.4 |
Short-term environmental accrual – Note 9 | 1.7 |  |  | 1.2 |
Accrued interest | 4.1 |  |  | 2.3 |
Short-term deferred revenue – Note 1 | 9.0 |  |  | 13.5 |
Other | 4.4 |  |  | 4.1 |
Total | $ | 46.3 |  |  | $ | 41.0 |
Long-term Liabilities |
Long-term Liabilities. |  |  |
Derivative liabilities – Notes 10 and 11 | $ | 49.9 |  |  | $ | 55.5 |
Option premiums received – Notes 10 and 11 | 0.1 |  |  | 0.1 |
Income tax liabilities | 13.7 |  |  | 13.4 |
Workers’ compensation accruals | 20.6 |  |  | 20.8 |
Long-term environmental accrual – Note 9 | 20.3 |  |  | 20.8 |
Long-term asset retirement obligations | 4.0 |  |  | 3.8 |
Long-term deferred revenue – Note 1 | 1.6 |  |  | 3.3 |
Deferred compensation liability | 5.6 |  |  | 5.1 |
Other long-term liabilities | 2.9 |  |  | 3.2 |
Total | $ | 118.7 |  |  | $ | 126.0 |

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