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Goodwill and Intangible Assets | 9 Months Ended
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Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | Goodwill and Intangible Assets The changes in the carrying amount of goodwill for the nine months ended September 30, 2023 were as follows:
| Goodwill |  | Accumulated Impairment Losses |  | Total
Balance as of December 31, 2022 | $ | 218.8 |  |  | $ | (36.8) |  |  | $ | 182.0 |
Foreign currency fluctuations | (6.3) |  |  | 4.8 |  |  | (1.5) |
Balance as of September 30, 2023 | $ | 212.5 |  |  | $ | (32.0) |  |  | $ | 180.5 |
The balances of acquired intangible assets, excluding goodwill, were as follows:
| Customer Lists |  | Trade Names |  | Technology |  | Total
Balance as of September 30, 2023 |  |  |  |  |  |  |
Original cost | $ | 144.6 |  |  | $ | 28.1 |  |  | $ | 15.9 |  |  | $ | 188.6 |
Accumulated amortization | (94.2) |  |  | (17.8) |  |  | (12.4) |  |  | (124.4) |
Carrying value | $ | 50.4 |  |  | $ | 10.3 |  |  | $ | 3.5 |  |  | $ | 64.2 |
Weighted average original life (in years) | 15 |  | 11 |  | 11 |  |
Balance as of December 31, 2022 |  |  |  |  |  |  |
Original cost | $ | 146.6 |  |  | $ | 28.6 |  |  | $ | 15.9 |  |  | $ | 191.1 |
Accumulated amortization | (87.5) |  |  | (15.9) |  |  | (11.3) |  |  | (114.7) |
Carrying value | $ | 59.1 |  |  | $ | 12.7 |  |  | $ | 4.6 |  |  | $ | 76.4 |
Weighted average original life (in years) | 15 |  | 11 |  | 11 |  |
Amortization expense on intangible assets for the three and nine months ended September 30, 2023 was $3.5 million and $11.0 million, respectively. Amortization expense on intangible assets for the three and nine months ended September 30, 2022 was $3.7 million and $12.1 million, respectively. Estimated aggregate amortization expense based on the current carrying value of amortizable intangible assets for each of the five succeeding years and thereafter is as follows:
Remaining 2023 | $ | 3.4 |
2024 | 12.9 |
2025 | 11.6 |
2026 | 10.3 |
2027 | 7.1 |
Thereafter | 18.9 |
Total | $ | 64.2 |

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