Discontinued Operations - Significant Non-Cash Operating Items and Capital Expenditures (Details) - Discontinued Operations, Disposed of by Sale - Plamenca - USD ($) $ in Millions	9 Months Ended
Oct. 01, 2021	Oct. 02, 2020
Cash flows from operating activities
Non-cash restructuring charges	$ 0.0	$ 9.6
Impairment charges	0.0	10.3
Depreciation and amortization	5.6	9.0
Cash flows from investing activities:
Capital expenditures	$ 4.2	$ 4.5

Disposal Group, Including Discontinued Operation, Cash Flows from Discontinued Operations

No definition available.

Name:	nvst_DisposalGroupIncludingDiscontinuedOperationCashFlowsFromDiscontinuedOperationsAbstract
Namespace Prefix:	nvst_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Disposal Group, Including Discontinued Operation, Cash Flows From Investing Activities

+ References

No definition available.

+ Details

Name:	nvst_DisposalGroupIncludingDiscontinuedOperationCashFlowsFromInvestingActivitiesAbstract
Namespace Prefix:	nvst_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Disposal Group, Including Discontinued Operation, Impairment Charges

+ References

No definition available.

+ Details

Name:	nvst_DisposalGroupIncludingDiscontinuedOperationImpairmentCharges
Namespace Prefix:	nvst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Disposal Group Including Discontinued Operations, Non- Cash Restructuring Charges

+ References

No definition available.

+ Details

Name:	nvst_DisposalGroupIncludingDiscontinuedOperationsNonCashRestructuringCharges
Namespace Prefix:	nvst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of capital expenditure attributable to discontinued operations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760

+ Details

Name:	us-gaap_CapitalExpenditureDiscontinuedOperations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of deprecation and amortization expense attributable to property, plant and equipment and intangible assets of discontinued operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760

+ Details

Name:	us-gaap_DepreciationAndAmortizationDiscontinuedOperations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DiscontinuedOperationsDisposedOfBySaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=nvst_PlamencaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: