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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2023
Accounting Policies [Abstract] |
Schedule of Property, Plant and Equipment | Depreciation for property, plant and equipment, other than land and construction in progress, is based upon the following estimated useful lives using the straight-line method:
Building and building improvements | 20 to 39 years
Leasehold improvements | Lesser of lease term or useful life of asset
Machinery and equipment | 2 to 15 years
Furniture and fixtures | 3 to 5 years
Property, plant and equipment at cost and accumulated depreciation were as follows:
| As of December 31,
(in millions) | 2023 |  | 2022
Land(1) | $ | 9.0 |  |  | $ | 2.5 |
Building and building improvements(2) | 205.3 |  |  | 163.9 |
Machinery and equipment | 572.2 |  |  | 527.0 |
Furniture and fixtures | 18.1 |  |  | 17.2 |
Leasehold improvements | 16.0 |  |  | 11.7 |
Construction in process | 137.5 |  |  | 112.3 |
Property, plant and equipment, gross | 958.1 |  |  | 834.6 |
Less: accumulated depreciation(2) | (293.2) |  |  | (234.7) |
Property, plant and equipment, net | $ | 664.9 |  |  | $ | 599.9 |
(1) Includes $6.5 million of land at December 31, 2023 related to the finance lease discussed in Note 15. (2) Includes $31.7 million of building and building improvements and $0.4 million of accumulated depreciation at December 31, 2023 related to the finance lease discussed in Note 15.
Schedule of Intangible Assets with Finite Useful Life | Intangible assets with finite useful lives are amortized based on the pattern in which the economic benefits of the assets are estimated to be consumed over the following estimated useful lives of the assets:
Customer relationships | 14 years
Internal-use software | 3 to 5 years
Developed technology | 13 to 15 years
Patents | 8 to 15 years
The gross carrying amount, accumulated amortization and net book value of intangible assets at the end of each period were as follows:
| As of December 31,
2023 |  | 2022
(in millions) | Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value
Customer relationships | $ | 43.2 |  |  | $ | (30.9) |  |  | $ | 12.3 |  |  | $ | 43.2 |  |  | $ | (27.5) |  |  | $ | 15.7 |
Internal-use software | 43.1 |  |  | (13.9) |  |  | 29.2 |  |  | 34.8 |  |  | (12.0) |  |  | 22.8 |
Developed technology(1) | 27.4 |  |  | (3.0) |  |  | 24.4 |  |  | 27.4 |  |  | (1.0) |  |  | 26.4 |
Patents(1) | 36.2 |  |  | (3.4) |  |  | 32.8 |  |  | 11.0 |  |  | (0.4) |  |  | 10.6 |
Total intangible assets | $ | 149.9 |  |  | $ | (51.2) |  |  | $ | 98.7 |  |  | $ | 116.4 |  |  | $ | (40.9) |  |  | $ | 75.5 |
(1) Includes intangible assets acquired in December 2022. See Note 19 for additional information.

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