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Environmental Compliance (Tables)
12 Months Ended
Dec. 31, 2012
Environmental Compliance  
Schedule of Change in Asset Retirement Obligation [Table Text Block]
ARO
Liability
ARO
Asset
Balance at December 31, 2009
$ 21.3 $ 19.3
Additional retirement obligation
- -
Accretion
1.3 -
Balance at December 31, 2010
$ 22.6 $ 19.3
Additional retirement obligation
- -
Accretion
- -
Balance at December 31, 2011
$ 22.6 $ 19.3
Additional retirement obligation
- -
Accretion
- -
Expense of American Centrifuge capital assets
- (19.3 )
Balance at December 31, 2012
$ 22.6 $ -