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GOODWILL AND INTANGIBLE ASSETS Reconciliation of Changes in Goodwill (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Goodwill [Roll Forward]    
Balance, beginning of the year $ 2,089,339us-gaap_Goodwill  
Goodwill, Translation Adjustments (136,068)us-gaap_GoodwillTranslationAdjustments  
Balance, end of the year 1,953,271us-gaap_Goodwill  
Dental Consumables, Endodontic and Dental Laboratory Businesses    
Goodwill [Roll Forward]    
Balance, beginning of the year   565,714us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= xray_DentalConsumablesandCertainInternationalBusinessesMember
Balance, end of the year   565,714us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= xray_DentalConsumablesandCertainInternationalBusinessesMember
Select Developed and Emerging Markets Businesses    
Goodwill [Roll Forward]    
Balance, beginning of the year   129,227us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= xray_HealthcareandEmergingMarketsBusinessesMember
Balance, end of the year   $ 129,227us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= xray_HealthcareandEmergingMarketsBusinessesMember