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Accounts Payable and Accrued Liabilities (Tables)
12 Months Ended
Dec. 31, 2021
Accounts Payable and Accrued Liabilities [Abstract]  
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
Components of accounts payable and accrued liabilities follow (in millions):
December 31,
20212020
Trade payables$4.9 $4.9 
Compensation and employee benefits23.1 22.2 
Postretirement health and life benefit obligations - current7.0 11.6 
Accrued HALEU Contract loss0.5 7.0 
Operating lease liability0.9 2.4 
Other accrued liabilities1.4 2.5 
   Total accounts payable and accrued liabilities$37.8 $50.6