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Goodwill and Other Intangible Assets | 12 Months Ended
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Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangible Assets |
8. | Goodwill and Other Intangible Assets
The changes in the net carrying value of goodwill by reportable segment for the years ended December 31, 2021 and 2020 are as follows:
| Sealing Technologies |  | Advanced Surface Technologies |  | Engineered Materials |  | Total
| (in millions)
Goodwill as of December 31, 2019 | $ | 300.9 |  |  | $ | 167.7 |  |  | $ | 16.7 |  |  | $ | 485.3 |
Foreign currency translation | 3.4 |  |  | 6.9 |  |  | — |  |  | 10.3 |
Acquisitions | — |  |  | 133.1 |  |  | — |  |  | 133.1 |
Dispositions | (6.9) |  |  | — |  |  | — |  |  | (6.9) |
Goodwill as of December 31, 2020 | 297.4 |  |  | 307.7 |  |  | 16.7 |  |  | 621.8 |
Foreign currency translation | (4.5) |  |  | 1.5 |  |  | — |  |  | (3.0) |
Acquisition | — |  |  | 359.5 |  |  | — |  |  | 359.5 |
Dispositions | (13.5) |  |  | — |  |  | (11.6) |  |  | (25.1) |
Goodwill as of December 31, 2021 | $ | 279.4 |  |  | $ | 668.7 |  |  | $ | 5.1 |  |  | $ | 953.2 |
The goodwill balances reflected above are net of accumulated impairment losses of $27.8 million for the Sealing Technologies segment as of December 31, 2021, 2020 and 2019, $108.7 million for the Engineered Materials segment as of December 31, 2021 and $154.8 million for the Engineered Materials segment as of December 31, 2020, and 2019. Identifiable intangible assets are as follows:
| As of December 31, 2021 |  | As of December 31, 2020
| Gross Carrying Amount |  | Accumulated Amortization |  | Gross Carrying Amount |  | Accumulated Amortization
| (in millions)
Amortized: |  |  |  |  |  |  |
Customer relationships | $ | 536.5 |  |  | $ | 166.0 |  |  | $ | 505.5 |  |  | $ | 177.8 |
Existing technology | 480.8 |  |  | 49.5 |  |  | 179.6 |  |  | 41.3 |
Trademarks | 70.9 |  |  | 24.9 |  |  | 44.6 |  |  | 25.7 |
Other | 41.4 |  |  | 22.4 |  |  | 37.6 |  |  | 22.3 |
| 1,129.6 |  |  | 262.8 |  |  | 767.3 |  |  | 267.1 |
Indefinite-Lived: |  |  |  |  |  |  |
Trademarks | 46.6 |  |  | — |  |  | 53.4 |  |  | — |
Total | $ | 1,176.2 |  |  | $ | 262.8 |  |  | $ | 820.7 |  |  | $ | 267.1 |
Amortization expense for the years ended December 31, 2021, 2020 and 2019 was $46.4 million, $37.7 million and $32.5 million, respectively. The estimated amortization expense for definite-lived (amortized) intangible assets for the next five years is as follows (in millions):
2022 | $ | 78.7 |
2023 | $ | 71.3 |
2024 | $ | 71.2 |
2025 | $ | 69.8 |
2026 | $ | 66.4 |

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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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