| **Goodwill and other intangible assets - Summary of Changes in Carrying Amount of Goodwill (Detail) $ in Thousands** | 6 Months Ended |
|----------------------------------------------------------------------------------------------------------------------|----------------|
||
| **Goodwill [Roll Forward]**                                                                                          |           |
| Beginning balance                                                                                                    | $ 1,713,148    |
| Acquisitions                                                                                                         | 129,856        |
| Currency effect                                                                                                      | (21,913)       |
| Ending balance                                                                                                       | 1,821,091      |
| Industrial Precision Solutions                                                                                       |           |
| **Goodwill [Roll Forward]**                                                                                          |           |
| Beginning balance                                                                                                    | 415,020        |
| Acquisitions                                                                                                         | 129,856        |
| Currency effect                                                                                                      | (12,431)       |
| Ending balance                                                                                                       | 532,445        |
| Advanced Technology Solutions                                                                                        |           |
| **Goodwill [Roll Forward]**                                                                                          |           |
| Beginning balance                                                                                                    | 1,298,128      |
| Acquisitions                                                                                                         | 0              |
| Currency effect                                                                                                      | (9,482)        |
| Ending balance                                                                                                       | $ 1,288,646    |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.
+ References
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| X                                                                                                                                                                                                                                                                                                                 |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.
+ References
No definition available.
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| X                                                                                                                                                                    |
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