Estimated amount of loss resulting from an adverse tax position.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (d)(3)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

+ Details

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

- Definition

The amount of the additional liability or refund received or expected based on a final settlement with a taxing authority.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (3)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

+ Details

Name:	us-gaap_IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of estimated penalties recognized in the period arising from income tax examinations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Effective Income Tax Rate Reconciliation, Deduction, Worthless Stock, Amount

+ References

No definition available.

+ Details

Name:	xray_EffectiveIncomeTaxRateReconciliationDeductionWorthlessStockAmount
Namespace Prefix:	xray_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Employment Agreement Terms Minimum Period Of Employment

+ References

No definition available.

+ Details

Name:	xray_EmploymentAgreementTermsMinimumPeriodOfEmployment
Namespace Prefix:	xray_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Class Action Lawsuits

+ References

No definition available.

+ Details

Name:	xray_NumberOfClassActionLawsuits
Namespace Prefix:	xray_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Distributors

+ References

No definition available.

+ Details

Name:	xray_NumberOfDistributors
Namespace Prefix:	xray_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Stockholders Who Filed Derivative Action

+ References

No definition available.

+ Details

Name:	xray_NumberOfStockholdersWhoFiledDerivativeAction
Namespace Prefix:	xray_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_IncomeTaxAuthorityNameAxis=xray_SwedishTaxAgencyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TaxPeriodAxis=us-gaap_TaxYear2012Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeTaxAuthorityNameAxis=us-gaap_InternalRevenueServiceIRSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TaxPeriodAxis=us-gaap_TaxYear2013Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TaxPeriodAxis=us-gaap_TaxYear2014Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

COMMITMENTS AND CONTINGENCIES (Details)		3 Months Ended	6 Months Ended
COMMITMENTS AND CONTINGENCIES (Details)	Jan. 11, 2018	Mar. 31, 2014 USD ($)	Jun. 30, 2020 USD ($)	Apr. 29, 2019 performancePeriods	Jun. 07, 2018 performancePeriods
Loss Contingencies [Line Items]
Employment agreement terms minimum period of employment	8 years
Number of class action lawsuits \| performancePeriods					2
Number of distributors \| performancePeriods					3
Number of stockholders who filed derivative action \| performancePeriods				2
Worthless stock deduction		$ 546,000,000.0
Swedish Tax Agency
Loss Contingencies [Line Items]
Possible tax expense			$ 41,000,000.0
Tax Year 2012 \| IRS
Loss Contingencies [Line Items]
Liability (refund) from income tax examination			4,700,000
Tax Year 2013 \| IRS
Loss Contingencies [Line Items]
Liability (refund) from income tax examination			0
Tax Year 2014 \| IRS
Loss Contingencies [Line Items]
Income tax penalties			$ 17,100,000