CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net gain after tax	$ 263.1	$ (1,010.9)	$ (1,550.3)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(82.9)	(180.0)	386.3
Net (loss) gain on derivative financial instruments	(0.5)	29.4	(20.2)
Net unrealized holding gain on available-for-sale securities	0.0	(44.3)	44.3
Pension liability adjustments	(36.9)	7.4	4.6
Net (decrease) increase in other comprehensive income	(120.3)	(187.5)	415.0
Total comprehensive income (loss)	142.8	(1,198.4)	(1,135.3)
Less: Comprehensive income attributable to noncontrolling interests	0.9	0.3	0.0
Comprehensive income (loss) attributable to Dentsply Sirona	$ 141.9	$ (1,198.7)	$ (1,135.3)