SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)	1 Months Ended	3 Months Ended		12 Months Ended
	May 31, 2019	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2021 USD ($) reporting_unit Segment Customer	Dec. 31, 2020 USD ($) Customer	Dec. 31, 2019 USD ($) Customer	Feb. 04, 2020 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Provision for doubtful accounts				$ (1,100,000)	$ 3,600,000	$ 2,100,000
Inventory, capitalized expenses				0	0
Depreciation expense				39,400,000	42,100,000	42,600,000
Write off of construction in progress		$ 6,700,000
Interest expense capitalized into property, plant, and equipment				$ 1,200,000	2,300,000
Number of reportable segments | Segment				2
Number of reporting units | reporting_unit				3
Contributions to Integra Foundation				$ 1,200,000	800,000	300,000
Foreign currency transaction gain (loss)				100,000	(1,600,000)	(300,000)
Restructuring reserve, current				10,200,000
Restructuring costs		6,400,000			6,400,000
Defer payment and taxation, base salary, percentage (up to)	75.00%
Defer payment and taxation, bonus and other eligible cash compensation, percentage (up to)	100.00%
Interest paid				43,200,000	47,300,000	48,900,000
Interest paid, capitalized into construction in progress				1,200,000	2,300,000	3,100,000
Income taxes paid				49,500,000	29,800,000	16,200,000
Property and equipment purchases included in liabilities				4,700,000	1,600,000	11,000,000
In-process research and development				0	0	64,916,000
Intangible assets, net		989,436,000		1,145,573,000	989,436,000
Cost of goods sold
Summary Of Significant Accounting Policies [Line Items]
Restructuring costs incurred				3,400,000	4,900,000
Selling, general and administrative
Summary Of Significant Accounting Policies [Line Items]
Restructuring costs incurred				500,000	1,200,000
Research and development
Summary Of Significant Accounting Policies [Line Items]
Restructuring costs incurred				300,000	300,000
2025 Notes
Summary Of Significant Accounting Policies [Line Items]
Convertible debt							$ 575,000,000
Convertible Debt | 2025 Notes
Summary Of Significant Accounting Policies [Line Items]
Debt, interest rate							0.50%
Rebound
Summary Of Significant Accounting Policies [Line Items]
Development milestone payment, to be paid		20,000,000	$ 5,000,000.0	$ 5,000,000	20,000,000	5,000,000.0
In-process research and development			$ 5,000,000.0			$ 5,000,000
Intangible assets, net		20,000,000			$ 20,000,000
Sales Revenue, Net | Customer Concentration Risk
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, threshold percentage				10.00%	10.00%	10.00%
Concentration risk, number of customers over benchmark | Customer				0	0	0
Minimum
Summary Of Significant Accounting Policies [Line Items]
Manufacturing period for products shipped with no alternative use and right of payment for performance				1 month
Maximum
Summary Of Significant Accounting Policies [Line Items]
Manufacturing period for products shipped with no alternative use and right of payment for performance				3 months
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Smith & Nephew USD Limited
Summary Of Significant Accounting Policies [Line Items]
Inventories		52,800,000			$ 52,800,000
Property, plant and equipment, net		$ 37,900,000			$ 37,900,000