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Segment and Geographic Information (Tables) | 12 Months Ended
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Dec. 31, 2023
Operating Segments [Abstract] |
Revenues by Reportable Segment | Information regarding each reportable segment for the periods indicated is set forth below:
Revenue by segment: | Year ended December 31
| 2021 |  | 2022 |  | 2023
|  | % of Total |  |  | % of Total |  |  | % of Total
ATS | $ | 2,315.1 |  | 41% |  | $ | 2,979.0 |  | 41% |  | $ | 3,319.8 |  | 42%
CCS | 3,319.6 |  | 59% |  | 4,271.0 |  | 59% |  | 4,641.2 |  | 58%
Communications revenue as a % of total revenue |  | 40 | % |  |  | 40 | % |  |  | 33 | %
Enterprise revenue as a % of total revenue |  | 19 | % |  |  | 19 | % |  |  | 25 | %
Total | $ | 5,634.7 |  |  |  | $ | 7,250.0 |  |  |  | $ | 7,961.0 |  |
Information by Reportable Segment |
Segment income, segment margin, and reconciliation of segment income to IFRS earnings before income taxes: | Year ended December 31
| 2021 |  | 2022 |  | 2023
|  | Segment Margin |  |  | Segment Margin |  |  | Segment Margin
ATS segment income and margin | $ | 105.0 |  | 4.5 | % |  | $ | 140.9 |  | 4.7 | % |  | $ | 156.1 |  | 4.7 | %
CCS segment income and margin | 128.9 |  | 3.9 | % |  | 217.1 |  | 5.1 | % |  | 289.1 |  | 6.2 | %
Total segment income | 233.9 |  |  |  | 358.0 |  |  |  | 445.2 |  |
Reconciling items: |  |  |  |  |  |  |  |
Finance costs | 31.7 |  |  |  | 59.7 |  |  |  | 76.6 |  |
Employee SBC expense (note 12) | 33.4 |  |  |  | 51.0 |  |  |  | 55.6 |  |
TRS FVAs (gains) (note 12) | — |  |  |  | — |  |  |  | (45.6) |  |
Amortization of intangible assets (excluding computer software) | 22.5 |  |  |  | 37.0 |  |  |  | 36.8 |  |
Other charges, net of recoveries (note 15) | 10.3 |  |  |  | 6.7 |  |  |  | 15.2 |  |
IFRS earnings before income taxes | $ | 136.0 |  |  |  | $ | 203.6 |  |  |  | $ | 306.6 |  |
Disclosure of Geographical Areas | The following table details our external revenue allocated by manufacturing location among countries that generated 10% or more of total revenue for the years indicated:
| Year ended December 31
| 2021 |  | 2022 |  | 2023
Thailand | 36 | % |  | 44 | % |  | 46 | %
China | 16 | % |  | 11 | % |  | *
Malaysia | 13 | % |  | 12 | % |  | 11 | %
Canada | * |  | * |  | *
* Less than 10%. The following table details our allocation of PP&E and ROU assets among countries that represented 10% or more of total PP&E and ROU assets for the years indicated:
| December 31
| 2022 |  | 2023
Thailand | 18 | % |  | 25 | %
United States | 25 | % |  | 24 | %
Canada | * |  | *
* Less than 10%. The following table details our allocation of intangible assets and goodwill among countries that represented 10% or more of total intangible assets and goodwill for the years indicated:
| December 31
| 2022 |  | 2023
United States | 48 | % |  | 48 | %
Singapore | 42 | % |  | 41 | %
Canada | * |  | *
* Less than 10%.

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