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EARNINGS PER COMMON SHARE - COMPUTATION OF BASIC AND DILUTED (Details) - USD ($)
$ / shares in Units, shares in Millions, $ 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
Earnings Per Share [Abstract]                      
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)
Shares                      
Weighted average common shares outstanding (in shares)                 223.1 224.3 229.4
Incremental weighted average shares from assumed exercise of dilutive options from stock-based compensation awards (in shares)                 1.3 0.0 0.0
Diluted (in shares)                 224.4 224.3 229.4
(Loss) earnings per common share                      
Earnings (loss) per common share - basic (in dollars per share) $ 0.46 $ 0.38 $ 0.16 $ 0.18 $ 0.01 $ 0.13 $ (4.98) $ 0.36 $ 1.18 $ (4.51) $ (6.76)
Earnings (loss) per common share - diluted (in dollars per share) $ 0.46 $ 0.38 $ 0.16 $ 0.17 $ 0.01 $ 0.13 $ (4.98) $ 0.35 $ 1.17 $ (4.51) $ (6.76)