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Derivative Financial Instruments - Additional Information (Detail)	12 Months Ended
	Sep. 30, 2017 USD ($) ozt	Sep. 30, 2016 USD ($) ozt	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2012 USD ($)
Derivative Financial Instruments [Line Items]
Unrealized Gain (Loss) on Derivatives	$ 8,900,000
Document Period End Date	Sep. 30, 2017
Long-term debt	$ 5,870,900,000	$ 5,635,600,000
Spectrum Brands [Member]
Derivative Financial Instruments [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	10,800,000	1,100,000	$ 27,500,000
Spectrum Brands [Member] | Standby Letters of Credit
Derivative Financial Instruments [Line Items]
Letters of Credit Outstanding, Amount				$ 0	$ 0
Spectrum Brands [Member] | Interest Rate Contract [Member]
Derivative Financial Instruments [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 300,000
Derivative, Fixed Interest Rate	0.00%
Derivative, Notional Amount	$ 300,000,000	$ 300,000,000
Derivative, Remaining Maturity	2 years 7 months	6 months
Spectrum Brands [Member] | Foreign exchange contracts
Derivative Financial Instruments [Line Items]
Accumulated Other Comprehensive Income Loss Cumulative Gain Loss From Derivative Instrument Before Tax	$ 6,300,000
Derivative Contracts Market Value	360,800,000	$ 224,800,000
Spectrum Brands [Member] | Foreign exchange forward agreements
Derivative Financial Instruments [Line Items]
Derivative Contracts Market Value	205,700,000	131,400,000
Spectrum Brands [Member] | Zinc Commodity Swap Contract [Member]
Derivative Financial Instruments [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	1,300,000
Derivative Contracts Market Value	$ 20,700,000	$ 12,800,000
Spectrum Brands [Member] | ERROR in label resolution.
Derivative Financial Instruments [Line Items]
Derivative, Nonmonetary Notional Amount | ozt	20.9	31.0
Derivative Contracts Market Value	$ 400,000	$ 600,000
Spectrum Brands [Member] | Bronze Commodity Contract [Member]
Derivative Financial Instruments [Line Items]
Derivative Contracts Market Value	6,600,000	4,000,000
Salus Capital Partners LLC
Derivative Financial Instruments [Line Items]
Long-term debt	22,200,000	30,300,000
Derivatives not designated as hedging instrument
Derivative Financial Instruments [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 4,500,000	$ 8,700,000

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Accumulated other comprehensive income loss cumulative gain loss from derivative instrument before tax.

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Derivative Contracts Market Value

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Derivative Financial Instruments [Line Items]

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Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
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Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fixed interest rate related to the interest rate derivative.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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