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Related party transactions (Tables) | 12 Months Ended
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Dec. 31, 2023
Related Party Transactions [Abstract] |
Receivables from and Payables to Affiliates | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2022 |  | 2023
​ | ​ | (In millions)
Current receivables from affiliates: |  | ​ |  |  | ​ |
LPC | ​ | $ | — | ​ | $ | 16.9
Contran - trade items | ​ | ​ | .2 | ​ | ​ | .2
Other | ​ |  | 2.7 | ​ |  | .4
Total | ​ | $ | 2.9 | ​ | $ | 17.5
Current payables to affiliates: | ​ |  |  | ​ |  |
LPC | ​ | $ | 17.1 | ​ | $ | 19.9
Contran - income taxes | ​ |  | 5.8 | ​ |  | 10.2
Total | ​ | $ | 22.9 | ​ | $ | 30.1
Noncurrent payable to affiliates: | ​ |  |  | ​ |  |
Contran - income taxes | ​ | $ | 33.4 | ​ | $ | 18.5
Payables to affiliate included in long-term debt: | ​ |  |  | ​ |  |
Valhi - Contran credit facility | ​ | $ | 121.4 | ​ | $ | 93.4

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- Definition Schedule of receivables from (payables to) affiliates. + References No definition available. + Details
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