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Accounts Payable and Accrued Liabilities (Tables)
12 Months Ended
Dec. 31, 2023
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,
20232022
Trade payables$6.1 $5.9 
Compensation and employee benefits21.1 15.7 
Postretirement health and life benefit obligations - current10.1 7.3 
Accrued HALEU Operation Contract loss
— 20.0 
Short-term inventory loan14.3 9.9 
Operating lease liability1.4 3.3 
Other accrued liabilities3.2 3.4 
   Total accounts payable and accrued liabilities$56.2 $65.5