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Goodwill and Other Intangible Assets - Net | 12 Months Ended
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Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
GOODWILL AND OTHER INTANGIBLE ASSETS - Net | GOODWILL AND OTHER INTANGIBLE ASSETS—Net Goodwill The following table presents the changes in the carrying amount of goodwill (in millions):
| Amount
Balance—December 31, 2020 | $ | 93.0 |
Additions due to business combinations | 30.2 |
Adjustment due to adoption of ASU 2021-08 | 3.0 |
Foreign currency translation adjustments | (1.1) |
Balance—December 31, 2021 | $ | 125.1 |
There were no impairments to goodwill during 2021, 2020 and 2019, or any previous years. Other Intangible Assets—Net The following tables present other intangible assets—net (in millions, except years):
| December 31, 2021
| Weighted-Average Useful Life (in Years) |  | Gross |  | Accumulated Amortization |  | Net
Other intangible assets—net: |  |  |  |  |  |  |
Finite-lived intangible assets: |  |  |  |  |  |  |
Developed technologies | 4.0 |  | $ | 82.2 |  |  | $ | 38.0 |  |  | $ | 44.2 |
Customer relationships | 6.0 |  | 22.2 |  |  | 11.9 |  |  | 10.3 |
Trade name | 10.0 |  | 6.1 |  |  | 0.2 |  |  | 5.9 |
Backlog | 1.0 |  | 4.8 |  |  | 1.6 |  |  | 3.2 |
Total other intangible assets—net |  |  | $ | 115.3 |  |  | $ | 51.7 |  |  | $ | 63.6 |
| December 31, 2020
| Weighted-Average Useful Life (in Years) |  | Gross |  | Accumulated Amortization |  | Net
Other intangible assets—net: |  |  |  |  |  |  |
Finite-lived intangible assets: |  |  |  |  |  |  |
Developed technologies | 4.0 |  | $ | 59.3 |  |  | $ | 32.3 |  |  | $ | 27.0 |
Customer relationships | 4.0 |  | 24.8 |  |  | 20.2 |  |  | 4.6 |
Total other intangible assets—net |  |  | $ | 84.1 |  |  | $ | 52.5 |  |  | $ | 31.6 |
Amortization expense of finite-lived intangible assets was $18.5 million, $13.3 million and $10.9 million in 2021, 2020, and 2019, respectively. The following table summarizes estimated future amortization expense of finite-lived intangible assets (in millions):
Year Ending December 31, | Amount
2022 | $ | 22.7 |
2023 | 16.2 |
2024 | 11.4 |
2025 | 6.1 |
Thereafter | 7.2 |
Total | $ | 63.6 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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