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Accounts Payable and Accrued Liabilities (Table) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Accounts Payable and Accrued Liabilities, Current [Abstract] |  |
Trade payables | $ 21.1 | $ 20.2
Compensation and benefits | 41.0 | 45.2
American Centrifuge accrued liabilities | 13.3 | 11.0
Accrued property and other taxes payable | 4.7 | 10.9
Accrued lease turnover - current | 32.2 |
Accrued interest payable on debt | 5.3 | 4.7
Other accrued liabilities | 28.2 | 28.1
Accounts payable and accrued liabilities | $ 145.8 | $ 120.1

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