Fair Value Measurements - Schedule of Fair Value Measurement Inputs and Valuation Techniques (Details) $ in Thousands, € in Millions	9 Months Ended
	Oct. 01, 2021 USD ($)	Oct. 01, 2021 EUR (€)	Aug. 30, 2021 USD ($)	Apr. 02, 2021 USD ($)	Apr. 02, 2021 EUR (€)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 EUR (€)	Jul. 31, 2019 USD ($)	Jul. 31, 2019 EUR (€)	Apr. 16, 2019 USD ($)	Apr. 16, 2019 EUR (€)
ATI Industrial Automation, Inc.
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contingent consideration			$ 51,900
ARGES GmbH
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contingent consideration	$ 4,300	€ 3.7				$ 5,100	€ 4.1	$ 7,900	€ 7.1
Ingenia-CAT, S.L.
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contingent consideration				$ 2,900	€ 2.4	$ 2,900	€ 2.3			$ 6,600	€ 5.8
Significant Other Unobservable Inputs (Level 3) | ATI Industrial Automation, Inc.
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation Technique	novt:ValuationTechniqueMonteCarloMethodMember
Contingent consideration	$ 51,900
Significant Other Unobservable Inputs (Level 3) | ATI Industrial Automation, Inc. | EBITDA Risk Premium
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Business acquisition, Percentage Applied	7.2	7.2
Significant Other Unobservable Inputs (Level 3) | ATI Industrial Automation, Inc. | EBITDA Volatility
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Business acquisition, Percentage Applied	27.0	27.0
Significant Other Unobservable Inputs (Level 3) | ATI Industrial Automation, Inc. | Credit Spread
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Business acquisition, Percentage Applied	2.1	2.1
Significant Other Unobservable Inputs (Level 3) | ARGES GmbH
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation Technique	novt:ValuationTechniqueMonteCarloMethodMember
Contingent consideration	$ 4,282
Significant Other Unobservable Inputs (Level 3) | ARGES GmbH | Revenue volatility
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Business acquisition, Percentage Applied	21.0	21.0
Significant Other Unobservable Inputs (Level 3) | ARGES GmbH | Cost of debt
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Business acquisition, Percentage Applied	2.6	2.6
Significant Other Unobservable Inputs (Level 3) | ARGES GmbH | Discount rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Business acquisition, Percentage Applied	3.7	3.7
Significant Other Unobservable Inputs (Level 3) | Ingenia-CAT, S.L.
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation Technique	novt:ValuationTechniqueMonteCarloMethodMember
Contingent consideration	$ 1,493
Significant Other Unobservable Inputs (Level 3) | Ingenia-CAT, S.L. | Revenue volatility
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Business acquisition, Percentage Applied	38.5	38.5
Significant Other Unobservable Inputs (Level 3) | Ingenia-CAT, S.L. | Cost of debt
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Business acquisition, Percentage Applied	3.1	3.1
Significant Other Unobservable Inputs (Level 3) | Ingenia-CAT, S.L. | Discount rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Business acquisition, Percentage Applied	9.6	9.6
Significant Other Unobservable Inputs (Level 3) | Other Acquisitions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation Technique	us-gaap:ValuationTechniqueDiscountedCashFlowMember	us-gaap:ValuationTechniqueDiscountedCashFlowMember
Contingent consideration	$ 1,399
Significant Other Unobservable Inputs (Level 3) | Other Acquisitions | Discount rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Asset acquisition, Percentage Applied	22.8	22.8