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Goodwill and Other Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets | The gross carrying value and accumulated amortization for each major class of intangible assets are as follows:
| June 30, 2021 |  | December 31, 2020
(in millions) | Gross Carrying Amount |  | Accumulated Amortization |  | Gross Carrying Amount |  | Accumulated Amortization
Amortized intangible assets: |  |  |  |  |  |  |
Trademarks | $ | 2.0 |  |  | $ | 0.4 |  |  | $ | 1.0 |  |  | $ | 0.4 |
Patents | 40.8 |  |  | 38.4 |  |  | 40.8 |  |  | 36.1 |
Customer relationships | 39.7 |  |  | 6.7 |  |  | 12.0 |  |  | 5.2 |
Developed technology | 41.7 |  |  | 9.8 |  |  | 36.5 |  |  | 6.7 |
Other | 2.4 |  |  | 1.0 |  |  | 1.8 |  |  | 0.7 |
Total | 126.6 |  |  | 56.3 |  |  | 92.1 |  |  | 49.1 |
Unamortized intangible assets: |  |  |  |  |  |  |
Trademarks | 32.0 |  |  |  |  | 32.0 |  |  |
IPR&D (1) | 3.7 |  |  |  |  | 3.7 |  |  |
Total | 35.7 |  |  |  |  | 35.7 |  |  |
Total intangible assets, net | $ | 106.0 |  |  |  |  | $ | 78.7 |  |  |
Schedule of Future Amortization Expense | Amortization expense for the next five years, based on current definite-lived intangible balances, is estimated to be as follows:
(in millions) |
Q3-Q4 2021 | $ | 8.6 |
2022 | 11.8 |
2023 | 11.2 |
2024 | 11.2 |
2025 | 10.8 |

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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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