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INCOME TAXES - Narrative (Details) SFr in Millions, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2019 CHF (SFr) | Sep. 30, 2019 USD ($)
Income Tax Contingency [Line Items] |  |  |  |  |  |
Effective income tax rate | 22.10% | (0.40%) |  | 24.60% | (3.50%) | (3.50%)
Effective income tax rate reconciliation, tax expense, sale of Extremity Orthopedic business | $ 4.2 |  |  | $ 4.2 |  |
Rebound |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Effective income tax rate reconciliation, in-process research and development (IPR&D) expense |  | $ 59.9 |  |  |  | $ 59.9
Foreign Tax Authority | Ministry of the Economy, Finance and Industry, France |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Effective income tax rate reconciliation, tax benefit, reversal of valuation allowance | $ 3.2 |  |  |  |  |
Foreign Tax Authority | Swiss Federal Tax Administration (FTA) |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Federal tax credit |  |  | $ 10.8 |  |  |
Effective income tax rate reconciliation, tax benefit, federal tax holiday | SFr |  |  |  |  | SFr 12 |

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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