SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) shares in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) segment shares	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Significant Accounting Policies [Line Items]
Cash and cash equivalents	$ 438,000,000	$ 405,000,000
Decrease to pre-tax income	60,000,000	(345,000,000)	$ 958,000,000
Decrease to net income	83,000,000	(263,000,000)	1,011,000,000
Cost of inventories determined by LIFO method	3,000,000	5,000,000
Cost of inventories determined by LIFO method, amount of increase if FIFO method was used	22,000,000	14,000,000
Foreign currency translation gain (loss)	182,000,000	(83,000,000)	(180,000,000)
Stockholders' equity	4,970,000,000	5,095,000,000	5,133,000,000	$ 6,628,000,000
Net exchange gains (losses)	(13,000,000)	(27,000,000)	6,000,000
R&D costs included in selling, general and administrative expenses	$ 115,000,000	131,000,000	161,000,000
Adjusted operating income margin target, achievement period for vesting	12 months
Operating income margin and target threshold measurement period	12 months
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture | shares	3
Goodwill	$ 3,986,000,000	3,397,000,000	3,431,000,000
Number of reportable segments | segment	2
Restatement Adjustment
Significant Accounting Policies [Line Items]
Decrease to pre-tax income	$ 9,000,000
Decrease to net income	7,000,000
Straight Smile LLC
Significant Accounting Policies [Line Items]
Total acquisition consideration	1,000,000,000.0
Goodwill	631,000,000
Intangible assets	416,000,000
Various Credit Facilities | Line of Credit
Significant Accounting Policies [Line Items]
Credit facilities, maximum borrowing capacity	400,000,000
Line of Credit | 2018 Revolving Credit Facility
Significant Accounting Policies [Line Items]
Credit facilities, maximum borrowing capacity	$ 700,000,000
Restricted Stock Units (RSUs)
Significant Accounting Policies [Line Items]
Exercisable period following death, disability or qualified retirement	1 year
Employee Stock Option
Significant Accounting Policies [Line Items]
Award expiration period	10 years
Accrued Liabilities
Significant Accounting Policies [Line Items]
Deferred revenue	$ 41,000,000	29,000,000
Gain and (Loss) on Cash Flow Hedges
Significant Accounting Policies [Line Items]
Foreign currency translation gain (loss)		4,000,000
Gain and (Loss) on Cash Flow Hedges | Hedges of Net Investments
Significant Accounting Policies [Line Items]
Foreign currency translation gain (loss)	(54,000,000)
Foreign Currency Translation Gain (Loss)
Significant Accounting Policies [Line Items]
Stockholders' equity	(187,000,000)	(368,000,000)	(284,000,000)
Foreign currency translation adjustments recorded in AOCI net of tax effects		(87,000,000)
Accumulated foreign currency adjustment, translation gain (loss)
Significant Accounting Policies [Line Items]
Stockholders' equity	(25,000,000)	(260,000,000)
Accumulated foreign currency adjustment, translation gain (loss) | Hedges of Net Investments
Significant Accounting Policies [Line Items]
Stockholders' equity	$ 235,000,000
Building
Significant Accounting Policies [Line Items]
Useful life (in years)	40 years
Machinery and equipment | Minimum
Significant Accounting Policies [Line Items]
Useful life (in years)	4 years
Machinery and equipment | Maximum
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	$ 18,000,000	29,000,000	25,000,000	$ 22,000,000
Allowance for doubtful accounts receivable, write-offs	12,000,000	6,000,000
Additions - charged (credited) to costs and expenses	$ 1,000,000	$ 10,000,000	$ 6,000,000