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Credit Losses - Narrative (Details) | 3 Months Ended
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Apr. 03, 2026 segment
Credit Loss [Abstract] |
Number of portfolio segments | 1

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- Definition Number Of Portfolio Segments + References No definition available. + Details
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Namespace Prefix: | nvst_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_CreditLossAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration