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Goodwill and intangible assets | 12 Months Ended
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Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and intangible assets | Goodwill and intangible assets Goodwill Changes in the carrying amount of goodwill by reporting unit were as follows:
|  | Total |  | DWS |  | CA&I |  | ECS |  | Other
Balance at December 31, 2022 |  | $ | 287.1 |  |  | $ | 140.5 |  |  | $ | 38.0 |  |  | $ | 98.3 |  |  | $ | 10.3 |
Translation adjustments |  | 0.3 |  |  | 0.3 |  |  | — |  |  | — |  |  | — |
Balance at December 31, 2023 |  | 287.4 |  |  | 140.8 |  |  | 38.0 |  |  | 98.3 |  |  | 10.3 |
Goodwill impairment (i) |  | (39.1) |  |  | (39.1) |  |  | — |  |  | — |  |  | — |
Translation adjustments |  | (0.4) |  |  | (0.4) |  |  | — |  |  | — |  |  | — |
Balance at December 31, 2024 |  | $ | 247.9 |  |  | $ | 101.3 |  |  | $ | 38.0 |  |  | $ | 98.3 |  |  | $ | 10.3 |
(i) During the third quarter of 2024, the company recorded a goodwill impairment charge of $39.1 million in its DWS reporting unit as the carrying value exceeded its fair value. See Note 1, "Summary of significant accounting policies" for additional details. Accumulated goodwill impairment losses as of December 31, 2024 were $39.1 million. There were no accumulated goodwill impairment losses as of December 31, 2023. At December 31, 2024, there was no goodwill allocated to reporting units with negative net assets. At December 31, 2023, the amount of goodwill allocated to reporting units with negative net assets within Other was $10.3 million. Intangible Assets, Net Intangible assets, net at December 31, 2024 and 2023 consists of the following:
As of December 31, 2024 |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Technology (i) |  | $ | 10.0 |  |  | $ | 10.0 |  |  | $ | — |
Customer relationships (ii) |  | 54.2 |  |  | 19.0 |  |  | 35.2 |
Marketing (ii) |  | 1.3 |  |  | 1.0 |  |  | 0.3 |
Total |  | $ | 65.5 |  |  | $ | 30.0 |  |  | $ | 35.5 |
As of December 31, 2023 |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Technology (i) |  | $ | 10.0 |  |  | $ | 8.1 |  |  | $ | 1.9 |
Customer relationships (ii) |  | 54.2 |  |  | 14.1 |  |  | 40.1 |
Marketing (ii) |  | 1.3 |  |  | 0.6 |  |  | 0.7 |
Total |  | $ | 65.5 |  |  | $ | 22.8 |  |  | $ | 42.7 |
(i) Amortization expense is included within cost of revenue - technology in the consolidated statements of income (loss). (ii) Amortization expense is included within selling, general and administrative expense in the consolidated statements of income (loss). Amortization expense was $7.2 million, $9.7 million and $10.1 million for the years ended December 31, 2024, 2023 and 2022, respectively. The future amortization relating to acquired intangible assets at December 31, 2024 was estimated as follows:
Year |  | Future Amortization Expense
2025 |  | $ | 4.3 |
2026 |  | 4.0 |
2027 |  | 4.0 |
2028 |  | 4.0 |
2029 |  | 4.0 |
Thereafter |  | 15.2 |
Total |  | $ | 35.5 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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