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Supplemental Balance Sheet Data | 12 Months Ended
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Dec. 31, 2024
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,
| 2024 |  | 2023
| (in millions)
Trade | $ | 378 |  |  | $ | 459 |
Other | 26 |  |  | 46 |
Accounts receivable—net | $ | 404 |  |  | $ | 505 |
Inventories Inventories consist of the following:
| December 31,
| 2024 |  | 2023
| (in millions)
Finished goods | $ | 263 |  |  | $ | 256 |
Raw materials, spare parts and supplies | 51 |  |  | 43 |
Total inventories | $ | 314 |  |  | $ | 299 |
Other Assets Other assets consist of the following:
| December 31,
| 2024 |  | 2023
| (in millions)
Spare parts | $ | 208 |  |  | $ | 200 |
Nonqualified employee benefit trusts | 17 |  |  | 17 |
Tax-related assets | 638 |  |  | 610 |
Other | 54 |  |  | 40 |
Total other assets | $ | 917 |  |  | $ | 867 |
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. See Note 12—Income Taxes for additional information. Other includes pension plans in a net asset funded status. See Note 13—Pension and Other Postretirement Benefits for additional information. Accounts Payable and Accrued Expenses Accounts payable and accrued expenses consist of the following:
| December 31,
| 2024 |  | 2023
| (in millions)
Accounts payable(1) | $ | 125 |  |  | $ | 114 |
Accrued capital expenditures(1) | 59 |  |  | 48 |
Accrued natural gas costs | 106 |  |  | 85 |
Payroll and employee-related costs | 69 |  |  | 81 |
Accrued interest | 30 |  |  | 30 |
Other | 214 |  |  | 162 |
Total accounts payable and accrued expenses | $ | 603 |  |  | $ | 520 |
___________________________________________________________________________ (1)As of December 31, 2024 and 2023, accrued capital expenditures totaled $101 million and $68 million, respectively, of which $42 million and $20 million, respectively, are included within accounts payable in the table above. 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 14—Financing Agreements and Note 15—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, 2024, other current liabilities of $9 million consist primarily of $3 million of unrealized loss on natural gas derivatives and $4 million for asset retirement obligations. As of December 31, 2023, other current liabilities of $42 million consist primarily of $35 million of unrealized loss on natural gas derivatives and $6 million for asset retirement obligations. See Note 17—Derivative Financial Instruments and Note 24—Asset Retirement Obligations for additional information. Other Liabilities Other liabilities consist of the following:
| December 31,
| 2024 |  | 2023
| (in millions)
Benefit plans and deferred compensation | $ | 40 |  |  | $ | 50 |
Tax-related liabilities | 245 |  |  | 247 |
Unrealized loss on embedded derivative | — |  |  | 1 |
Other | 16 |  |  | 16 |
Other liabilities | $ | 301 |  |  | $ | 314 |
Benefit plans and deferred compensation include liabilities for pensions, retiree medical benefits, and the noncurrent portion of incentive plans. See Note 13—Pension and Other Postretirement Benefits for additional information. Tax-related liabilities include reserves for unrecognized tax benefits and the related interest. See Note 12—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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