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SIGNIFICANT ACCOUNTING POLICIES - Description of Business (Details) | 12 Months Ended
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Dec. 31, 2020 country
Accounting Policies [Abstract] |
Company years in innovation and service | 134 years
Number of countries in which entity operates | 120

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

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- Definition The number of countries in which the entity operates as of balance sheet date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Entity, Years In Business + References No definition available. + Details
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Namespace Prefix: | xray_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration