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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill by segment | Goodwill by segment is as follows:
| December 31, 2024 |  | December 31, 2023
| (in millions)
Construction Products | $ | 861.2 |  |  | $ | 516.1 |
Engineered Structures | 480.1 |  |  | 437.6 |
Transportation Products | 19.9 |  |  | 37.0 |
| $ | 1,361.2 |  |  | $ | 990.7 |
Intangible assets, net | Intangibles, net consisted of the following:
|  |  |  | December 31, 2024 |  | December 31, 2023
|  |  |  | (in millions)
Intangibles with indefinite lives - Trademarks |  |  |  | $ | 43.8 |  |  | $ | 34.9 |
Intangibles with definite lives: |  |  |  |  |  |
Customer relationships |  |  |  | 169.1 |  | 142.7
Permits |  |  |  | 178.1 |  | 166.9
Other |  |  |  | 49.6 |  | 2.3
|  |  |  | 396.8 |  | 311.9
Less accumulated amortization |  |  |  | (102.3) |  | (76.1)
|  |  |  | 294.5 |  | 235.8
Intangible assets, net |  |  |  | $ | 338.3 |  |  | $ | 270.7 |
Expected future amortization expense of intangibles | Expected future amortization expense of intangibles as of December 31, 2024 is as follows:
| Amortization Expense
| (in millions)
2025 | $ | 26.7 |
2026 | 22.7 |
2027 | 20.5 |
2028 | 20.5 |
2029 | 20.1 |
Thereafter | 184.0 |

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