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Revenue Recognition (Rollforward Of Allowance For Product Returns) (Details) - USD ($) $ in Millions | 12 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Revenue Recognition [Abstract] |  |  |
Beginning Balance | $ 20.9 | $ 20.3 | $ 21.9
Charged to Profit & Loss | 33.4 | 30.3 | 22.9
Deductions | (34.4) | (31.8) | (25.5)
Other Adjustments | (0.7) | 2.1 | 1.0
Ending Balance | $ 19.2 | $ 20.9 | $ 20.3

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- Definition Allowance For Product Returns + References No definition available. + Details
Name: | spb_AllowanceForProductReturns
Namespace Prefix: | spb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Allowance For Product Returns Other Adjustments + References No definition available. + Details
Name: | spb_AllowanceForProductReturnsOtherAdjustments
Namespace Prefix: | spb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Allowance For Product Returns Write Offs + References No definition available. + Details
Name: | spb_AllowanceForProductReturnsWriteOffs
Namespace Prefix: | spb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Provision For Product Returns + References No definition available. + Details
Name: | spb_ProvisionForProductReturns
Namespace Prefix: | spb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration