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, 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			0.0
Other comprehensive (loss) income	(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 purchase plan	2.0	2.0		0.1			1.9
Restricted stock unit distributions	(4.8)	(4.8)		(12.8)			8.0
Restricted stock unit dividends	0.0			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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends (in dollars per share)	$ 0.0875
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	160.6
Other comprehensive (loss) income	(130.1)					(130.4)
Ending Balance at Sep. 30, 2019	5,059.1	5,057.3	2.6	6,567.2	1,324.3	(609.1)	(2,227.7)	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 (loss) income	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)
Restricted stock unit distributions	(0.1)	(0.1)		(0.8)			0.7
Restricted stock unit dividends	0.0			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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends (in dollars per share)	$ 0.0875
Net (loss) income	$ 85.0	85.0			85.0			0.0
Other comprehensive (loss) income	(106.5)	(106.5)				(106.5)		0.0
Exercise of stock options	2.4	2.4		0.4			2.0
Stock based compensation expense	15.4	15.4		15.4
Funding of employee stock purchase plan	2.2	2.2		0.2			2.0
Treasury shares purchased	(100.0)	(100.0)					(100.0)
Restricted stock unit distributions	(0.1)	(0.1)		(0.4)			0.3
Restricted stock unit dividends	0.0			0.3	(0.3)
Cash dividends	(22.2)	(22.2)			(22.2)
Ending Balance at Sep. 30, 2019	$ 5,059.1	5,057.3	2.6	6,567.2	1,324.3	(609.1)	(2,227.7)	1.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends (in dollars per share)	$ 0.1000
Beginning Balance at Dec. 31, 2019	$ 5,094.9	5,092.5	2.6	6,586.7	1,404.2	(599.7)	(2,301.3)	2.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(139.9)	(139.9)			(139.9)
Other comprehensive (loss) income	(112.2)	(112.5)				(112.5)		0.3
Exercise of stock options	3.8	3.8		(0.5)			4.3
Stock based compensation expense	9.4	9.4		9.4
Funding of employee stock purchase plan	2.1	2.1		0.8			1.3
Treasury shares purchased	(140.0)	(140.0)		(28.0)			(112.0)
Restricted stock unit distributions	(6.1)	(6.1)		(14.8)			8.7
Restricted stock unit dividends	0.0			0.3	(0.3)
Cash dividends	(21.8)	(21.8)			(21.8)
Ending Balance at Mar. 31, 2020	$ 4,690.2	4,687.5	2.6	6,553.9	1,242.2	(712.2)	(2,399.0)	2.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends (in dollars per share)	$ 0.1000
Beginning Balance at Dec. 31, 2019	$ 5,094.9	5,092.5	2.6	6,586.7	1,404.2	(599.7)	(2,301.3)	2.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(181.6)
Other comprehensive (loss) income	22.5					22.1
Ending Balance at Sep. 30, 2020	4,762.3	4,760.5	2.6	6,592.4	1,156.2	(577.6)	(2,413.1)	1.8
Beginning Balance at Mar. 31, 2020	4,690.2	4,687.5	2.6	6,553.9	1,242.2	(712.2)	(2,399.0)	2.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(95.9)	(95.4)			(95.4)			(0.5)
Other comprehensive (loss) income	67.6	67.5				67.5		0.1
Exercise of stock options	1.6	1.6		0.3			1.3
Stock based compensation expense	10.3	10.3		10.3
Treasury shares purchased	0.0	0.0		28.0			(28.0)
Restricted stock unit distributions	(6.5)	(6.5)		(16.0)			9.5
Restricted stock unit dividends				0.2	(0.2)
Cash dividends	(21.9)	(21.9)			(21.9)
Ending Balance at Jun. 30, 2020	$ 4,645.4	4,643.1	2.6	6,576.7	1,124.7	(644.7)	(2,416.2)	2.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends (in dollars per share)	$ 0.1000
Net (loss) income	$ 54.2	53.8			53.8			0.4
Other comprehensive (loss) income	67.1	67.1				67.1
Acquisition of noncontrolling interest	(0.7)	0.2		0.2				(0.9)
Exercise of stock options	0.1	0.1		(0.5)			0.6
Stock based compensation expense	16.5	16.5		16.5
Funding of employee stock purchase plan	2.6	2.6		0.9			1.7
Restricted stock unit distributions	(0.8)	(0.8)		(1.6)			0.8
Restricted stock unit dividends				0.2	(0.2)
Cash dividends	(22.1)	(22.1)			(22.1)
Ending Balance at Sep. 30, 2020	$ 4,762.3	$ 4,760.5	$ 2.6	$ 6,592.4	$ 1,156.2	$ (577.6)	$ (2,413.1)	$ 1.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends (in dollars per share)	$ 0.1000