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MARKETING AGREEMENT - Additional Information (Details) $ in Millions | Aug. 01, 2019 USD ($)
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Restated Marketing Agreement |
Marketing Agreement [Line Items] |
Percentage of program earnings | 50.00%
Annual payments | $ 18.0
Third Restated Agreement |
Marketing Agreement [Line Items] |
Minimum annual EBIT required to avoid reduction of contribution payment | 36.0
Minimum EBIT | 50.0
Brand decommissioning event payable | 375.0
Termination fee payable | $ 175.0
Minimum termination fee payable multiple | 4
Minimum termination fee payable threshold | $ 186.4

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- Definition Brand Decommissioning Event Payable + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Commission Payable, Percentage of Program Earnings + References No definition available. + Details
Name: | smg_CommissionPayablePercentageofProgramEarnings
Namespace Prefix: | smg_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Minimum contractual payments as defined in agreement. + References No definition available. + Details
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- Definition Marketing Agreement [Line Items] + References No definition available. + Details
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Namespace Prefix: | smg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Marketing Agreement, Terms, Minimum Earnings Before Income Taxes + References No definition available. + Details
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Namespace Prefix: | smg_
Data Type: | xbrli:monetaryItemType
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- Definition Minimum Termination Fee Payable + References No definition available. + Details
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Namespace Prefix: | smg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Minimum Termination Fee Payable, Multiple of Average Program Earnings, Prior 3 Years + References No definition available. + Details
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- Definition Minimum Termination Fee Payable, Threshold + References No definition available. + Details
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Namespace Prefix: | smg_
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Balance Type: | credit
Period Type: | instant

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- Definition Program Agreement, Terms, Minimum Annual EBIT Required To Avoid Reduction Of Contribution Payment + References No definition available. + Details
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Namespace Prefix: | smg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |