SIGNIFICANT ACCOUNTING POLICIES - ADDITIONAL INFORMATION (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) reporting_unit segment shares	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Significant Accounting Policies [Line Items]
Cost of inventories determined by LIFO method	$ 5.0	$ 9.0
Cost of inventories determined by LIFO method, amount of increase if FIFO method was used	$ 14.3	10.2
Number of reporting units | reporting_unit	5
Net exchange gains (losses)	$ (26.9)	(5.8)	$ 1.7
R&D costs included in selling, general and administrative expenses	$ 131.3	160.5	$ 151.7
Operating income margin and target threshold measurement period	12 months
Adjusted operating income margin target, achievement period for vesting	12 months
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture | shares	2,700,000
Number of reportable segments | segment	2
Restricted Stock Units (RSUs)
Significant Accounting Policies [Line Items]
Restricted stock units, vested, shares issuable upon being exercised | shares	1
Exercisable period following death, disability or qualified retirement	1 year
Employee Stock Option
Significant Accounting Policies [Line Items]
Award expiration period	10 years
Gain and (Loss) on Cash Flow Hedges
Significant Accounting Policies [Line Items]
Foreign currency translation adjustments	$ (3.7)	(14.9)
Foreign Currency Translation Gain (Loss)
Significant Accounting Policies [Line Items]
Foreign currency translation adjustments recorded in AOCI net of tax effects	$ (87.3)	$ (200.1)
Dental Products
Significant Accounting Policies [Line Items]
Percentage of sales, professional dental products	92.00%	91.00%	92.00%
Building
Significant Accounting Policies [Line Items]
Useful life (in years)	40 years
Minimum | Machinery and equipment
Significant Accounting Policies [Line Items]
Useful life (in years)	4 years
Maximum | Machinery and equipment
Significant Accounting Policies [Line Items]
Useful life (in years)	15 years
Allowance for doubtful accounts
Significant Accounting Policies [Line Items]
Allowance for Sirona opening balance	$ 29.4	$ 24.5	$ 22.4	$ 22.7
Allowance for doubtful accounts receivable, write-offs	6.1	2.6
Additions - charged (credited) to costs and expenses	10.7	6.0	$ 6.6
Accrued Liabilities
Significant Accounting Policies [Line Items]
Deferred revenue	$ 29.2	$ 29.3