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SHARE BASED COMPENSATION - Summary of Share Based Compensation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Share based compensation	$ 28.9	$ 31.8	$ 44.2
SB/RH
Share based compensation	$ 27.2	$ 30.5	$ 42.6

X

- Definition

Amount of noncash expense for share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

+ Details

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

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- Details

Name:	dei_LegalEntityAxis=spb_SbRhHoldingsLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: