CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions	Total	Total Dentsply Sirona Equity	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect on adoption of new accounting pronouncement	$ 0.0			$ 1.0	$ (1.0)
Beginning Balance at Dec. 31, 2016	8,125.9	$ 8,114.3	$ 2.6	6,516.7	3,948.0	$ (705.7)	$ (1,647.3)	$ 11.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	59.7	59.8			59.8			(0.1)
Other comprehensive income	47.6	47.7				47.7		(0.1)
Exercise of stock options	29.4	29.4		4.9			24.5
Stock based compensation expense	10.8	10.8		10.8
Funding of Employee Stock Ownership Plan	6.6	6.6		3.3			3.3
Treasury shares purchased	(84.6)	(84.6)					(84.6)
RSU distributions	(11.6)	(11.6)		(20.7)			9.1
RSU dividends	0.0			0.2	(0.2)
Cash dividends	(20.2)	(20.2)			(20.2)
Ending Balance at Mar. 31, 2017	8,163.6	8,152.2	2.6	6,516.2	3,986.4	(658.0)	(1,695.0)	11.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect on adoption of new accounting pronouncement | ASU 2014-09	(6.0)	(6.0)			(6.0)
Cumulative effect on adoption of new accounting pronouncement | ASU 2016-16	(2.7)	(2.7)			(2.7)
Cumulative effect on adoption of new accounting pronouncement | ASU 2018-02	7.6	7.6			7.6
Beginning Balance at Dec. 31, 2017	6,627.9	6,616.3	2.6	6,543.9	2,316.2	(291.0)	(1,955.4)	11.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	81.1	81.2			81.2			(0.1)
Other comprehensive income	10.6	10.0				10.0		0.6
Exercise of stock options	7.6	7.6		(1.8)			9.4
Stock based compensation expense	9.3	9.3		9.3
RSU distributions	(10.0)	(10.0)		(19.9)			9.9
RSU dividends	0.0			0.2	(0.2)
Cash dividends	(20.2)	(20.2)			(20.2)
Ending Balance at Mar. 31, 2018	$ 6,705.2	$ 6,693.1	$ 2.6	$ 6,531.7	$ 2,375.9	$ (281.0)	$ (1,936.1)	$ 12.1