XML 65 R34.htm IDEA: XBRL DOCUMENT v3.23.3
Revenue and Contracts with Customers - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 10 Months Ended 57 Months Ended
Oct. 19, 2023
Sep. 30, 2023
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2023
Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Provision for Loss on Contracts Utilized     $ (16.7) $ (0.5)      
Deferred revenue, revenue recognized     23.6 59.7      
Revenue, remaining performance obligation, amount   $ 1,000.0 1,000.0   $ 1,000.0 $ 1,000.0  
Deferred Revenue and Advances from Customers - Current and Noncurrent   306.0 306.0   $ 306.0 $ 306.0 $ 319.0
Unrealized Gain (Loss), Foreign Currency Transaction, before Tax   $ 0.6 $ 0.6        
HALEU Demo Contract              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Government cost share, percentage   80.00% 80.00%   80.00% 80.00%  
HALEU Ops Contract              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Cost obligated to DOE         $ 38.8    
Total Amount Program Cost         125.9    
Contract Value   $ 150.0 $ 150.0   150.0 $ 150.0  
New Amount Program Cost   5.8          
HALEU Ops Contract | Subsequent Event              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Additional costs obligated to DOE $ 5.5            
HALEU Ops Contract | Phase 2              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Contract Value   90.0 90.0   90.0 90.0  
Government [Member]              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Provision for Loss on Contracts   3.3 3.3   3.3 3.3 $ 20.0
Proceeds from Customers         22.1 173.0  
Government [Member] | HALEU Demo Contract              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Provision for Loss on Contracts Utilized     0.0 $ (0.5)   19.6  
Provision for Loss on Contracts   0.0 0.0   0.0 0.0  
Proceeds from Customers           171.2  
Government [Member] | HALEU Ops Contract              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Provision for Loss on Contracts Utilized   5.4 16.7   18.0    
Provision for Loss on Contracts   3.3 3.3   3.3 3.3  
Maximum [Member] | HALEU Ops Contract | Phase 1              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Government cost share portion   30.0 30.0   30.0 30.0  
Company cost share portion   $ 30.0 $ 30.0   $ 30.0 $ 30.0