SIGNIFICANT ACCOUNTING POLICIES - Corrections to the Consolidated Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts and notes receivables-trade, net	$ 732.0			$ 667.0
Inventories, net	548.0		$ 1.0	476.0
Prepaid expenses and other current assets	244.0			217.0
Total Current Assets	1,805.0			1,798.0
Other noncurrent assets	128.0			95.0
Total Assets	9,289.0			9,350.0
Accounts payable	271.0			302.0
Accrued liabilities	725.0			712.0
Income taxes payable	52.0			59.0
Total Current Liabilities	1,199.0			1,372.0
Operating lease liabilities	139.0			130.0
Deferred income taxes	401.0			381.0
Other noncurrent liabilities	562.0			554.0
Total Liabilities	4,226.0			4,415.0
Retained earnings	1,419.0			1,198.0
Total Dentsply Sirona Equity	5,060.0			4,932.0
Total Equity	5,063.0	$ 5,034.0	$ 4,890.0	4,935.0	$ 4,720.0	$ 4,608.0	$ 4,649.0	$ 5,048.0
Total Liabilities and Equity	9,289.0			9,350.0
As Previously Issued
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts and notes receivables-trade, net	748.0			673.0
Inventories, net	532.0			466.0
Prepaid expenses and other current assets	243.0			214.0
Total Current Assets	1,804.0			1,791.0
Other noncurrent assets	128.0			94.0
Total Assets	9,288.0			9,342.0
Accounts payable	276.0			305.0
Accrued liabilities	641.0			653.0
Income taxes payable	58.0			60.0
Total Current Liabilities	1,126.0			1,317.0
Deferred income taxes	413.0			393.0
Other noncurrent liabilities	560.0			554.0
Total Liabilities	4,163.0			4,372.0
Retained earnings	1,481.0			1,233.0
Total Dentsply Sirona Equity	5,122.0			4,967.0
Total Equity	5,125.0			4,970.0
Total Liabilities and Equity	9,288.0			9,342.0
Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts and notes receivables-trade, net	(16.0)			(6.0)
Inventories, net	16.0			10.0
Prepaid expenses and other current assets	1.0			3.0
Total Current Assets	1.0			7.0
Other noncurrent assets	0.0			1.0
Total Assets	1.0			8.0
Accounts payable	(5.0)			(3.0)
Accrued liabilities	84.0			59.0
Income taxes payable	(6.0)			(1.0)
Total Current Liabilities	73.0			55.0
Deferred income taxes	(12.0)			(12.0)
Other noncurrent liabilities	2.0			0.0
Total Liabilities	63.0			43.0
Retained earnings	(62.0)			(35.0)				$ 45.0
Total Dentsply Sirona Equity	(62.0)			(35.0)
Total Equity	(62.0)			(35.0)
Total Liabilities and Equity	$ 1.0			$ 8.0