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Supplemental Balance Sheet Information (Tables) | 6 Months Ended
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Jun. 30, 2013
Supplemental Balance Sheet Information [Abstract] |
Cash and Cash Equivalents |
| June 30, 2013 |  | December 31, 2012
Cash and Cash Equivalents. |  |  |
Cash and money market funds | $ | 78.1 |  |  | $ | 107.9 |
Commercial paper | 203.6 |  |  | 165.5 |
Total | $ | 281.7 |  |  | $ | 273.4 |
Trade Receivables |
Trade Receivables. |  |  |
Billed trade receivables | $ | 119.1 |  |  | $ | 124.4 |
Unbilled trade receivables | 4.4 |  |  | 0.2 |
Trade receivables, gross | 123.5 |  |  | 124.6 |
Allowance for doubtful receivables | (0.8 | ) |  | (0.8 | )
Trade receivables, net | $ | 122.7 |  |  | $ | 123.8 |
Inventories |
Inventories. |  |  |
Finished products | $ | 61.7 |  |  | $ | 59.9 |
Work-in-process | 69.1 |  |  | 55.5 |
Raw materials | 54.5 |  |  | 53.9 |
Operating supplies and repair and maintenance parts | 17.6 |  |  | 16.7 |
Total | $ | 202.9 |  |  | $ | 186.0 |
Prepaid Expenses and Other Current Assets |
Prepaid Expenses and Other Current Assets. |  |  |
Current derivative assets – Notes 9 and 10 | $ | 1.2 |  |  | $ | 3.0 |
Current deferred tax assets | 59.5 |  |  | 59.5 |
Current portion of option premiums paid – Notes 9 and 10 | 0.1 |  |  | 0.1 |
Short-term restricted cash | 1.3 |  |  | 1.3 |
Prepaid taxes | 4.0 |  |  | 2.1 |
Prepaid expenses | 4.0 |  |  | 4.1 |
Total | $ | 70.1 |  |  | $ | 70.1 |
Property, Plant and Equipment - Net |
Property, Plant and Equipment - Net. |  |  |
Land and improvements | $ | 22.6 |  |  | $ | 22.6 |
Buildings and leasehold improvements | 51.8 |  |  | 50.9 |
Machinery and equipment | 406.5 |  |  | 400.4 |
Construction in progress | 41.1 |  |  | 20.8 |
Active property, plant and equipment, gross | 522.0 |  |  | 494.7 |
Accumulated depreciation | (124.7 | ) |  | (111.4 | )
Active property, plant and equipment, net | 397.3 |  |  | 383.3 |
Idled equipment | 1.0 |  |  | 1.0 |
Total | $ | 398.3 |  |  | $ | 384.3 |
Other Assets |
Other Assets. |  |  |
Derivative assets – Notes 9 and 10 | $ | 52.5 |  |  | $ | 55.5 |
Restricted cash | 9.3 |  |  | 10.0 |
Long-term income tax receivable | — |  |  | 2.9 |
Deferred financing costs | 10.3 |  |  | 11.7 |
Available for sale securities | 6.0 |  |  | 5.6 |
Other | 0.4 |  |  | 0.3 |
Total | $ | 78.5 |  |  | $ | 86.0 |
Other Accrued Liabilities |
Other Accrued Liabilities. |  |  |
Current derivative liabilities – Notes 9 and 10 | $ | 6.0 |  |  | $ | 3.1 |
Current portion of option premiums received – Notes 9 and 10 | 0.1 |  |  | 0.1 |
Uncleared cash disbursement | 11.8 |  |  | 4.7 |
Accrued income taxes and taxes payable | 5.7 |  |  | 3.1 |
Accrued annual VEBA contribution | — |  |  | 20.0 |
Short-term environmental accrual – Note 8 | 4.6 |  |  | 3.0 |
Accrued interest | 3.7 |  |  | 3.7 |
Short-term deferred revenue | 3.2 |  |  | 6.7 |
Other | 4.8 |  |  | 7.4 |
Total | $ | 39.9 |  |  | $ | 51.8 |
Long-term Liabilities |
Long-term Liabilities. |  |  |
Derivative liabilities – Notes 9 and 10 | $ | 61.2 |  |  | $ | 63.5 |
Income tax liabilities | 11.7 |  |  | 15.1 |
Workers’ compensation accruals | 23.2 |  |  | 24.0 |
Long-term environmental accrual – Note 8 | 17.1 |  |  | 18.7 |
Long-term asset retirement obligations | 4.0 |  |  | 3.8 |
Deferred compensation liability | 6.3 |  |  | 5.8 |
Long-term capital lease | 0.2 |  |  | 0.2 |
Other long-term liabilities | 3.3 |  |  | 3.4 |
Total | $ | 127.0 |  |  | $ | 134.5 |
Long-term Debt |
Long-term Debt. — Note 3 |  |  |
Senior notes | $ | 225.0 |  |  | $ | 225.0 |
Cash convertible senior notes | 159.3 |  |  | 155.3 |
Total | $ | 384.3 |  |  | $ | 380.3 |

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