BENEFIT PLANS - RECONCILIATION FOR THE PLAN ASSETS CATEGORIZED AS LEVEL 3 (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Change in Plan Assets. Level 3 [Roll Forward]
Fair value of plan assets at beginning of year	$ 213	$ 185
Actual return on plan assets:
Effect of exchange rate changes	(7)	17
Fair value of plan assets at end of year	212	213
Insurance contracts
Change in Plan Assets. Level 3 [Roll Forward]
Fair value of plan assets at beginning of year	37
Actual return on plan assets:
Fair value of plan assets at end of year	34	37
Hedge funds
Change in Plan Assets. Level 3 [Roll Forward]
Fair value of plan assets at beginning of year	12
Actual return on plan assets:
Fair value of plan assets at end of year	11	12
Real Estate
Actual return on plan assets:
Fair value of plan assets at end of year	1
Fair Value, Inputs, Level 1, 2 and 3
Change in Plan Assets. Level 3 [Roll Forward]
Fair value of plan assets at beginning of year	213
Actual return on plan assets:
Fair value of plan assets at end of year		213
Level 3
Change in Plan Assets. Level 3 [Roll Forward]
Fair value of plan assets at beginning of year	49	39
Actual return on plan assets:
Relating to assets still held at the reporting date	0	3
Purchases, sales and settlements, net	(3)	2
Transfers in and/or (out)	2
Effect of exchange rate changes	(2)	5
Fair value of plan assets at end of year	46	49
Level 3 \| Insurance contracts
Change in Plan Assets. Level 3 [Roll Forward]
Fair value of plan assets at beginning of year	37	30
Actual return on plan assets:
Relating to assets still held at the reporting date	(2)	3
Purchases, sales and settlements, net	(1)	0
Transfers in and/or (out)	2
Effect of exchange rate changes	(2)	4
Fair value of plan assets at end of year	34	37
Level 3 \| Hedge funds
Change in Plan Assets. Level 3 [Roll Forward]
Fair value of plan assets at beginning of year	12	9
Actual return on plan assets:
Relating to assets still held at the reporting date	1	0
Purchases, sales and settlements, net	(2)	2
Transfers in and/or (out)	0
Effect of exchange rate changes	0	1
Fair value of plan assets at end of year	11	12
Level 3 \| Real Estate
Change in Plan Assets. Level 3 [Roll Forward]
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets:
Relating to assets still held at the reporting date	1	0
Purchases, sales and settlements, net	0	0
Transfers in and/or (out)	0
Effect of exchange rate changes	0	0
Fair value of plan assets at end of year	$ 1	$ 0

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets still held.

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

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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

- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(iv)(01)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(iv)(01)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(ii)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(iv)(02)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(ii)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

+ Details

Name:	us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) plan assets of defined benefit plan.

+ References

+ Details

Name:	us-gaap_DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, measured using unobservable input, of increase (decrease) in plan asset of defined benefit plan from purchase, sale and settlement of trade associated with underlying investment.

+ References

+ Details

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

- Definition

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan, for assets transferred into (out of) Level 3 of fair value hierarchy. Includes, but is not limited to, transfer due to change in observability of significant inputs.

+ References

+ Details

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

- Definition

Defined Benefit Plans, Actual Return On Plan Assets [Abstract]

+ References

No definition available.

+ Details

Name:	xray_DefinedBenefitPlansActualReturnOnPlanAssetsAbstract
Namespace Prefix:	xray_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=xray_InsuranceContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_HedgeFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel12And3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: