GOODWILL AND INTANGIBLE ASSETS - Intangible assets narrative (Details) - In-process Research and Development (IPR&D) - USD ($) $ in Millions	3 Months Ended
Jun. 30, 2024	Sep. 30, 2023
Indefinite-Lived Intangible Assets [Line Items]
Impairment of IPR&D	$ 112.0	$ 110.0
Illumina, Inc.
Indefinite-Lived Intangible Assets [Line Items]
Impairment of IPR&D	$ 420.0
Discount Rate
Indefinite-Lived Intangible Assets [Line Items]
Discount rate on IPR&D	20.00%
Discount Rate \| Illumina, Inc.
Indefinite-Lived Intangible Assets [Line Items]
Discount rate on IPR&D	46.50%	19.00%

Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482686/350-30-45-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482665/350-30-50-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482665/350-30-50-3

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Name:	us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration