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Supplemental Balance Sheet Information (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012
Supplemental Balance Sheet Information [Abstract] |
Cash and Cash Equivalents |
|  | December 31, 2012 |  | December 31, 2011
Cash and Cash Equivalents. |  |  |  |
Cash and money market funds |  | $ | 107.9 |  |  | $ | 49.8 |
Commercial paper |  | 165.5 |  |  | — |
Total |  | $ | 273.4 |  |  | $ | 49.8 |
Trade Receivables |
Trade Receivables. |  |  |  |
Billed trade receivables |  | $ | 124.4 |  |  | $ | 98.9 |
Unbilled trade receivables — Note 1 |  | 0.2 |  |  | 0.9 |
Trade receivables, gross |  | 124.6 |  |  | 99.8 |
Allowance for doubtful receivables |  | (0.8 | ) |  | (0.9 | )
Trade receivables, net |  | $ | 123.8 |  |  | $ | 98.9 |
Inventories |
Inventories. |  |  |  |
Finished products |  | $ | 59.9 |  |  | $ | 75.9 |
Work-in-process |  | 55.5 |  |  | 57.5 |
Raw materials |  | 53.9 |  |  | 58.1 |
Operating supplies and repairs and maintenance parts |  | 16.7 |  |  | 14.2 |
Total |  | $ | 186.0 |  |  | $ | 205.7 |
Prepaid Expenses and Other Current Assets |
Prepaid Expenses and Other Current Assets. |  |  |  |
Current derivative assets — Notes 12 and 13 |  | $ | 3.0 |  |  | $ | — |
Current deferred tax assets |  | 59.5 |  |  | 63.0 |
Current portion of option premiums paid - Notes 12 and 13 |  | 0.1 |  |  | 0.4 |
Short-term restricted cash |  | 1.3 |  |  | 7.8 |
Prepaid taxes |  | 2.1 |  |  | 3.8 |
Prepaid expenses |  | 4.1 |  |  | 3.9 |
Total |  | $ | 70.1 |  |  | $ | 78.9 |
Property, Plant and Equipment - Net |
Property, Plant, and Equipment - Net. |  |  |  |
Land and improvements |  | $ | 22.6 |  |  | $ | 22.6 |
Buildings and leasehold improvements |  | 50.9 |  |  | 45.9 |
Machinery and equipment |  | 400.4 |  |  | 356.7 |
Construction in progress |  | 20.8 |  |  | 24.1 |
Active property, plant, and equipment, gross |  | 494.7 |  |  | 449.3 |
Accumulated depreciation |  | (111.4 | ) |  | (86.9 | )
Active property, plant, and equipment, net |  | 383.3 |  |  | 362.4 |
Idled equipment |  | 1.0 |  |  | 5.4 |
Property, plant, and equipment, net |  | $ | 384.3 |  |  | $ | 367.8 |
Other Assets |
Other Assets. |  |  |  |
Derivative assets — Notes 12 and 13 |  | $ | 55.5 |  |  | $ | 46.2 |
Option premiums paid — Notes 12 and 13 |  | — |  |  | 0.1 |
Restricted cash |  | 10.0 |  |  | 10.4 |
Long-term income tax receivable |  | 2.9 |  |  | 2.8 |
Deferred financing costs |  | 11.7 |  |  | 7.8 |
Available for sale securities |  | 5.6 |  |  | 4.9 |
Other |  | 0.3 |  |  | 0.1 |
Total |  | $ | 86.0 |  |  | $ | 72.3 |
Other Accrued Liabilities |
Other Accrued Liabilities. |  |  |  |
Current derivative liabilities — Notes 12 and 13 |  | $ | 3.1 |  |  | $ | 14.8 |
Current portion of option premiums received — Notes 12 and 13 |  | 0.1 |  |  | 0.1 |
Accrued book overdraft (uncleared cash disbursement) |  | 4.7 |  |  | — |
Accrued income taxes and taxes payable |  | 3.1 |  |  | 2.6 |
Accrued annual VEBA contribution |  | 20.0 |  |  | — |
Accrued freight |  | 2.2 |  |  | 2.4 |
Short-term environmental accrual — Note 11 |  | 3.0 |  |  | 1.2 |
Accrued interest |  | 3.7 |  |  | 2.3 |
Short-term deferred revenue — Note 1 |  | 6.7 |  |  | 13.5 |
Other |  | 5.3 |  |  | 4.1 |
Total |  | $ | 51.9 |  |  | $ | 41.0 |
Long-term Liabilities |
Long-term Liabilities. |  |  |  |
Derivative liabilities — Notes 12 and 13 |  | $ | 63.5 |  |  | $ | 55.5 |
Option premiums received — Notes 12 and 13 |  | — |  |  | 0.1 |
Income tax liabilities |  | 15.1 |  |  | 13.4 |
Workers’ compensation accruals |  | 24.0 |  |  | 20.8 |
Long-term environmental accrual — Note 11 |  | 18.7 |  |  | 20.8 |
Long-term asset retirement obligations |  | 3.8 |  |  | 3.8 |
Long-term deferred revenue - Note 1 |  | — |  |  | 3.3 |
Deferred compensation liability |  | 5.8 |  |  | 5.1 |
Other long-term liabilities |  | 3.6 |  |  | 3.2 |
Total |  | $ | 134.5 |  |  | $ | 126.0 |
Long-term Debt |
Long-term Debt. — Note 3 |  |  |  |
Senior notes |  | $ | 225.0 |  |  | $ | — |
Cash convertible senior notes |  | 155.3 |  |  | 148.0 |
Other notes payable |  | — |  |  | 3.4 |
Total |  | $ | 380.3 |  |  | $ | 151.4 |

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