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Inventories (Tables) | 12 Months Ended
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Dec. 31, 2024
Inventories |
Schedule of inventories | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | December 31, | ​ | December 31,
​ | ​ | ​ |  | 2024 |  | 2023
​ | ​ | ​ | ​ | (in millions)
LIFO inventories—cost on FIFO method | ​ | ​ | ​ | $ | 2,033.4 | ​ | $ | 2,087.3
Cost on FIFO method higher than LIFO value | ​ | ​ | ​ | ​ | (434.9) | ​ | ​ | (579.3)
Inventories—stated on LIFO method | ​ | ​ | ​ | ​ | 1,598.5 | ​ | ​ | 1,508.0
Inventories—stated on FIFO method | ​ | ​ | ​ | ​ | 428.3 | ​ | ​ | 535.2
​ | ​ | ​ | ​ | $ | 2,026.8 | ​ | $ | 2,043.2
Schedule of changes in the LIFO valuation reserve | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Year Ended December 31,
​ | 2024 |  | 2023 |  | 2022
​ | (in millions)
LIFO inventory valuation reserve income | $ | 144.4 | ​ | $ | 164.5 | ​ | $ | 76.6

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