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Related Party Transactions (Tables)
 12 Months Ended
Dec. 31, 2025
Related Party Transactions [Abstract]  
Schedule of Related Party Transactions
The following table shows the outstanding balance of the Tronox Loans, which on the Consolidated Balance Sheet is recorded in "Prepaid and other assets:
December 31,
20252024
Principal balance—22 
Accrued interest income balance—4 
Total outstanding balance— 26 
The following table shows the interest income earned on the Tronox Loans, which is recorded in "Interest income" on our Consolidated Statement of Operations:
December 31,
202520242023
Interest income— 25
The following table shows the amount of feedstock purchased from the Slagger, which is subsequently recorded in "Cost of goods sold" on our Consolidated Statement of Operations:
December 31,
202520242023
Settled as in-kind repayment of Tronox Loans10 58 44 
Settled in cash34 33 80 
Total chloride slag purchases44 91 124 
The following table shows the amounts due to AMIC at period-end regarding the purchase feedstock purchased from the Slagger, which are recorded in "Accrued liabilities" on our Consolidated Balance Sheet:
December 31,
20252024
Amount due to AMIC for slag purchases3 6 
In the Consolidated Statement of Operations and shown in the table below, the management fees per the Original Technical Services Agreement were recorded within "Other income, net" and other technical support fees, including fees per the Restated Technical Services Agreement, are recorded within "Selling, general and administrative" costs. From and after October 1, 2023, we no longer receive a management fee.
December 31,
202520242023
Management fees— — 6
Other technical support fees— — 2 
Total fees received— — 8
As shown in the table below, the note payable is recorded within "Long-term debt, net" and "Long-term debt due within one year" on the Consolidated Balance Sheet.
December 31,
20252024
Note payable, due within 1 year87
Note payable, due longer than 1 year from now512
Total outstanding note payable1319
Amounts regarding interest expense and loan repayments for the MGT loan, which are recorded on the Consolidated Statement of Operations within “Interest expense” and “Net sales,” respectively, are shown below:
December 31,
202520242023
Interest expense112
Loan Repayment via MGT delivered to ATTM666

As a result of these transactions we have entered into related to the MGT assets, Tronox purchases chlorine gas from ATTM for use in the production of MGT and such transactions are reflected as follows:
December 31,
202520242023
Purchases of chlorine gas755

These purchases are subsequently recorded within “Cost of goods sold” on the Consolidated Statement of Operations. Amounts due at period end, which are presented below, are recorded within “Accrued liabilities” on the Consolidated Balance Sheet.
December 31,
20252024
Amount due related to purchases of chlorine gas16

As Tronox delivers MGT product to ATTM, amounts are recorded within “Net sales” on the Consolidated Statement of Operations, as shown below:
December 31,
202520242023
MGT sales made to ATTM as product is delivered545247
Amounts related to MGT deliveries that are outstanding at period end are recorded in “Prepaid and other assets” on the Consolidated Balance Sheet, as shown below:
December 31,
20252024
Due from ATTM for MGT deliveries514