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Accounts payable and accrued liabilities (Tables) | 12 Months Ended
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Dec. 31, 2024
Accounts payable and accrued liabilities |
Schedule of Accounts Payable and Accrued Liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2023 |  | 2024
​ | ​ | (In millions)
Accounts payable: |  | ​ |  |  | ​ |
Kronos | ​ | $ | 218.7 | ​ | $ | 232.4
CompX | ​ |  | 3.1 | ​ |  | 3.7
BMI/LandWell | ​ |  | 6.7 | ​ |  | 8.0
Distributions payable to noncontrolling interest | ​ |  | — | ​ |  | 5.9
Total | ​ | $ | 228.5 | ​ | $ | 250.0
​ | ​ | ​ | ​ | ​ | ​ | ​
Current accrued liabilities: | ​ | ​ | ​ | ​ | ​ | ​
Employee benefits | ​ | $ | 36.2 | ​ | $ | 38.7
Accrued development costs | ​ | ​ | 15.1 | ​ | ​ | 30.0
Deferred income | ​ | ​ | 88.8 | ​ | ​ | 28.2
Accrued sales discounts and rebates | ​ |  | 22.5 | ​ |  | 27.6
Interest | ​ |  | 5.1 | ​ |  | 11.4
Operating lease liabilities | ​ |  | 3.9 | ​ |  | 3.5
Other | ​ |  | 45.0 | ​ |  | 59.7
Total | ​ | $ | 216.6 | ​ | $ | 199.1
​ | ​ | ​ | ​ | ​ | ​ | ​
Noncurrent accrued liabilities: | ​ |  |  | ​ |  |
Accrued development costs | ​ | $ | 42.3 | ​ | $ | 26.8
Operating lease liabilities | ​ |  | 18.6 | ​ |  | 17.1
Insurance claims and expenses | ​ |  | 14.9 | ​ |  | 16.6
Deferred income | ​ | ​ | 15.5 | ​ | ​ | 11.8
Asset retirement obligations | ​ | ​ | 7.2 | ​ | ​ | 14.3
Other postretirement benefits | ​ | ​ | 7.4 | ​ | ​ | 6.7
Employee benefits | ​ |  | 4.9 | ​ |  | 4.5
Earn-out liability | ​ | ​ | — | ​ | ​ | 4.3
Other | ​ |  | .6 | ​ |  | .6
Total | ​ | $ | 111.4 | ​ | $ | 102.7

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- Definition Tabular disclosure of the (a) carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business (accounts payable); (b) other payables; and (c) accrued liabilities. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). An alternative caption includes accrued expenses. + References No definition available. + Details
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