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SIGNIFICANT ACCOUNTING POLICIES - Restatement Adjustments (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                      
Total net sales $ 1,111.5 $ 962.1 $ 1,009.4 $ 946.2 $ 1,059.7 $ 928.4 $ 1,042.1 $ 956.1 $ 4,029.2 $ 3,986.3 $ 3,993.4
Selling, general and administrative expenses                 1,723.5 1,719.1 1,674.7
Provision (benefit) for income taxes                 82.3 52.5 (53.2)
Net income (loss) attributable to Dentsply Sirona $ 102.3 $ 85.0 $ 36.4 $ 39.2 $ 1.8 $ 28.0 $ (1,122.0) $ 81.2 $ 262.9 (1,011.0) $ (1,550.0)
Calculated under Revenue Guidance in Effect before Topic 606 [Member]                      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                      
Total net sales                   3,986.8  
Selling, general and administrative expenses                   1,719.0  
Provision (benefit) for income taxes                   52.6  
Net income (loss) attributable to Dentsply Sirona                   (1,010.5)  
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09                      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                      
Total net sales                   (0.5)  
Selling, general and administrative expenses                   0.1  
Provision (benefit) for income taxes                   (0.1)  
Net income (loss) attributable to Dentsply Sirona                   $ (0.5)