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Accounts payable and accrued liabilities | 12 Months Ended
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Dec. 31, 2024
Accounts payable and accrued liabilities |
Accounts payable and accrued liabilities | ​ ​ Note 10 – 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
​ The risks associated with certain of our accrued insurance claims and expenses have been reinsured, and the related IBNR receivables are recognized as noncurrent assets to the extent the related liability is classified as a noncurrent liability. See Note 7. See Note 3 for additional details related to the acquisition earn-out liability.

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