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IMPAIRMENT, RESTRUCTURING AND OTHER - Activity Related to Liabilities Associated with Restructuring (Details) $ in Millions | 6 Months Ended
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Apr. 03, 2021 USD ($)
Restructuring Reserve [Roll Forward] |
Amounts accrued for restructuring and other, beginning balance | $ 3.9
Restructuring and other charges from continuing operations | 24.6
Payments and other | (25.9)
Amounts accrued for restructuring and other, ending balance | $ 2.6

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- Definition The amount of cash paid during the reporting period for charges associated with restructuring charges and other related expenses. + References No definition available. + Details
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Namespace Prefix: | smg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Restructuring And Other Related Charges, Continuing Operations + References No definition available. + Details
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Namespace Prefix: | smg_
Data Type: | xbrli:monetaryItemType
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Period Type: | duration

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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration