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Supplemental Balance Sheet Data | 12 Months Ended
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Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Supplemental Balance Sheet Data | Supplemental Balance Sheet Data Accounts Receivable—Net Accounts receivable—net consist of the following:
| December 31,
| 2025 |  | 2024
| (in millions)
Trade | $ | 444 |  |  | $ | 378 |
Other | 44 |  |  | 26 |
Accounts receivable—net | $ | 488 |  |  | $ | 404 |
Inventories Inventories consist of the following:
| December 31,
| 2025 |  | 2024
| (in millions)
Finished goods | $ | 332 |  |  | $ | 263 |
Raw materials, spare parts and supplies | 51 |  |  | 51 |
Total inventories | $ | 383 |  |  | $ | 314 |
Other Assets Other assets consist of the following:
| December 31,
| 2025 |  | 2024
| (in millions)
Spare parts | $ | 228 |  |  | $ | 208 |
Nonqualified employee benefit trusts | 18 |  |  | 17 |
Tax-related assets | 654 |  |  | 638 |
Other | 80 |  |  | 54 |
Total other assets | $ | 980 |  |  | $ | 917 |
Tax-related assets include long-term receivables related to U.S. and Canadian transfer pricing and the related interest, and certain payments to Canadian taxing authorities in 2022. See Note 10—Income Taxes for additional information. Other includes defined benefit pension plans in a net asset funded status. See Note 11—Pension and Other Postretirement Benefits for additional information. Accounts Payable and Accrued Expenses Accounts payable and accrued expenses consist of the following:
| December 31,
| 2025 |  | 2024
| (in millions)
Accounts payable(1) | $ | 148 |  |  | $ | 125 |
Accrued capital expenditures(1) | 51 |  |  | 59 |
Accrued natural gas costs | 127 |  |  | 106 |
Payroll and employee-related costs | 113 |  |  | 69 |
Accrued interest | 32 |  |  | 30 |
Other | 210 |  |  | 214 |
Total accounts payable and accrued expenses | $ | 681 |  |  | $ | 603 |
___________________________________________________________________________ (1)As of December 31, 2025 and 2024, accrued capital expenditures totaled $118 million and $101 million, respectively, of which $65 million and $42 million, respectively, are included within accounts payable in the table above, and as of December 31, 2025, $2 million is included in other liabilities. Payroll and employee-related costs include accrued salaries and wages, vacation, benefits, incentive plans and payroll taxes. Accrued interest includes interest payable on our outstanding senior notes. See Note 12—Financing Agreements and Note 13—Interest Expense for additional information. Other includes accrued utilities, property and other taxes, sales incentives and other credits, accrued litigation settlement costs, and accrued maintenance and professional services. Other Current Liabilities As of December 31, 2025, other current liabilities of $19 million consist primarily of a defined benefit pension plan liability of $9 million and an unrealized loss on natural gas derivatives of $5 million. As of December 31, 2024, other current liabilities of $9 million consist primarily of an unrealized loss on natural gas derivatives of $3 million and asset retirement obligations of $4 million. See Note 11—Pension and Other Postretirement Benefits, Note 16—Derivative Financial Instruments and Note 23—Asset Retirement Obligations for additional information. Other Liabilities Other liabilities consist of the following:
| December 31,
| 2025 |  | 2024
| (in millions)
Benefit plans and deferred compensation | $ | 47 |  |  | $ | 40 |
Tax-related liabilities | 262 |  |  | 245 |
Other | 28 |  |  | 16 |
Other liabilities | $ | 337 |  |  | $ | 301 |
Benefit plans and deferred compensation include liabilities for pensions, retiree medical benefits, and the noncurrent portion of incentive plans. See Note 11—Pension and Other Postretirement Benefits for additional information. Tax-related liabilities include reserves for unrecognized tax benefits and the related interest. See Note 10—Income Taxes for additional information.

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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/210/tableOfContent + Details
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