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
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 (loss) income	81.1	81.2			81.2			(0.1)
Other comprehensive income (loss)	10.6	10.0				10.0		0.6
Exercise of stock options	7.6	7.6		(1.8)			9.4
Reclassification on adoption of ASU | ASU 2016-16	(2.7)	(2.7)			(2.7)
Reclassification on adoption of ASU | ASU 2018-02	7.6	7.6			7.6
Stock based compensation expense	9.3	9.3		9.3
RSU distributions	(10.0)	(10.0)		(19.9)			9.9
RSU dividends				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
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 (loss) income	(1,039.9)
Other comprehensive income (loss)	(149.4)					(149.8)
Ending Balance at Jun. 30, 2018	5,140.1	5,127.2	2.6	6,526.2	1,216.2	(440.8)	(2,177.0)	12.9
Beginning 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(1,121.0)	(1,122.0)			(1,122.0)			1.0
Other comprehensive income (loss)	(160.0)	(159.8)				(159.8)		(0.2)
Exercise of stock options	3.6	3.6		(4.6)			8.2
Reclassification on adoption of ASU | ASU 2018-02	0.5	0.5			0.5
Stock based compensation expense	0.5	0.5		0.5
Treasury shares purchased	(250.2)	(250.2)					(250.2)
RSU distributions	(0.4)	(0.4)		(1.5)			1.1
RSU dividends				0.1	(0.1)
Cash dividends	(38.1)	(38.1)			(38.1)
Ending Balance at Jun. 30, 2018	5,140.1	5,127.2	2.6	6,526.2	1,216.2	(440.8)	(2,177.0)	12.9
Beginning Balance at Dec. 31, 2018	5,133.0	5,121.1	2.6	6,522.3	1,225.9	(478.7)	(2,151.0)	11.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	39.2	39.2			39.2
Other comprehensive income (loss)	(58.4)	(58.7)				(58.7)		0.3
Divestiture of noncontrolling interest	(10.4)							(10.4)
Exercise of stock options	19.7	19.7		1.5			18.2
Stock based compensation expense	9.1	9.1		9.1
Funding of Employee Stock Ownership Plan	2.0	2.0		0.1			1.9
RSU distributions	(4.8)	(4.8)		(12.8)			8.0
RSU dividends				0.2	(0.2)
Cash dividends	(19.9)	(19.9)			(19.9)
Ending Balance at Mar. 31, 2019	5,109.5	5,107.7	2.6	6,520.4	1,245.0	(537.4)	(2,122.9)	1.8
Beginning Balance at Dec. 31, 2018	5,133.0	5,121.1	2.6	6,522.3	1,225.9	(478.7)	(2,151.0)	11.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	75.6
Other comprehensive income (loss)	(23.6)					(23.9)
Ending Balance at Jun. 30, 2019	5,182.9	5,181.1	2.6	6,551.3	1,261.8	(502.6)	(2,132.0)	1.8
Beginning Balance at Mar. 31, 2019	5,109.5	5,107.7	2.6	6,520.4	1,245.0	(537.4)	(2,122.9)	1.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	36.4	36.4			36.4			0.0
Other comprehensive income (loss)	34.8	34.8				34.8		0.0
Exercise of stock options	56.5	56.5		6.3			50.2
Stock based compensation expense	25.2	25.2		25.2
Treasury shares purchased	(60.0)	(60.0)					(60.0)
RSU distributions	(0.1)	(0.1)		(0.8)			0.7
RSU dividends				0.2	(0.2)
Cash dividends	(19.4)	(19.4)			(19.4)
Ending Balance at Jun. 30, 2019	$ 5,182.9	$ 5,181.1	$ 2.6	$ 6,551.3	$ 1,261.8	$ (502.6)	$ (2,132.0)	$ 1.8