Balance Sheet and Cash Flow Supplemental Information Accrued liabilities consisted of the following: | | | | | | | | | | | | | September 30, 2026 | | December 31, 2025 | | Employee-related costs and benefits | $ | 120 | | | $ | 111 | | | Related party payables | 9 | | | 4 | | | Interest | 4 | | | 27 | | | Sales rebates | 37 | | | 45 | | | | | | | Taxes other than income taxes | 10 | | | 9 | | | Asset retirement obligations | 11 | | | 17 | | | | | | | | | | | Short term obligation under sale and leaseback transaction | 7 | | | — | | | Other accrued liabilities | 41 | | | 61 | | | Accrued liabilities | $ | 239 | | | $ | 274 | |
Additional supplemental cash flow information for the nine months ended September 30, 2026 and 2025 and as of September 30, 2026 and December 31, 2025 is as follows: | | | | | | | | | | | | | Nine Months Ended September 30, | | Supplemental non cash information: | 2026 | | 2025 | | Operating activities - Chloride slag inventory purchases made from AMIC (including VAT) | $ | — | | | $ | 11 | | | Operating activities - MGT sales made to ATTM | $ | 5 | | | $ | 5 | | | | | | | | | | | Investing activities - In-kind receipt of AMIC loan repayment | $ | — | | | $ | 11 | | | Financing activities - Initial commercial insurance premium financing agreement | $ | 17 | | | $ | 21 | | | Financing activities - Repayment of MGT loan | $ | 5 | | | $ | 5 | | | | | | | September 30, 2026 | | December 31, 2025 | | Capital expenditures acquired but not yet paid | $ | 37 | | | $ | 44 | |
|