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BUSINESS COMBINATIONS - SUMMARY OF INTANGIBLE ASSETS (Details) - USD ($) $ in Millions | Jan. 21, 2021 | Dec. 31, 2020
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Datum Dental, Ltd |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Intangible assets | $ 81 |
Straight Smile LLC |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets acquired, amount |  | $ 416
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Intangible assets |  | 416
In-process R&D | Datum Dental, Ltd |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Indefinite-lived intangible assets acquired, amount | 11 |
Developed technology | Datum Dental, Ltd |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets acquired, amount | $ 70 |
Developed technology | Datum Dental, Ltd | Minimum |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Weighted average useful life (in years) | 15 years |
Developed technology | Datum Dental, Ltd | Maximum |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Weighted average useful life (in years) | 20 years |
Non-compete agreements | Straight Smile LLC |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets acquired, amount |  | $ 16
Weighted average useful life (in years) |  | 5 years
Technology know-how | Straight Smile LLC |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets acquired, amount |  | $ 210
Weighted average useful life (in years) |  | 10 years
Tradenames and trademarks | Straight Smile LLC |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets acquired, amount |  | $ 190
Weighted average useful life (in years) |  | 20 years

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