COMPREHENSIVE INCOME - ADDITIONAL INFORMATION (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
COMPREHENSIVE INCOME [Abstract]
Cumulative foreign currency translation adjustment losses	$ 107.5	$ 412.4
Cumulative foreign currency translation adjustment losses on loans designated as hedges of net investments	$ (111.8)	$ (78.1)

Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Losses, Net of Tax

No definition available.

Name:	xray_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationLossesNetOfTax
Namespace Prefix:	xray_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant