GOODWILL AND INTANGIBLE ASSETS - Activity of Goodwill by Reportable Operating Segment (Details) $ in Millions	3 Months Ended
Jan. 01, 2021 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 623.9
Measurement period adjustments to business combinations in prior year	0.5
Foreign currency translation adjustments	3.3
Ending balance	627.7
Oncology Systems
Goodwill [Roll Forward]
Beginning balance	454.7
Measurement period adjustments to business combinations in prior year	0.5
Foreign currency translation adjustments	0.2
Ending balance	455.4
Other
Goodwill [Roll Forward]
Beginning balance	169.2
Measurement period adjustments to business combinations in prior year	0.0
Foreign currency translation adjustments	3.1
Ending balance	$ 172.3

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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