Derivative Financial Instruments - Pretax Impact of Derivative Instruments Designated as Cash Flow Hedges on the Accompanying Condensed Consolidated Statements of Operations, and Within AOCI (Detail) - USD ($)
$ in Millions

12 Months Ended

Sep. 30, 2017

Sep. 30, 2016

Sep. 30, 2015

Derivative Instruments, Gain (Loss) [Line Items]

Document Period End Date

Sep. 30, 2017

Impact of effective and ineffective portions of cash flow hedges and gain (loss) realized in statement of operations [Table Text Block]

he following tables summarize the impact of the effective portion of designated hedges and the gain (loss) recognized in the accompanying Consolidated Statements of Operations for Fiscal 2017, 2016 and 2015:

Fiscal 2017	Classification	Effective Portion
		Gain (Loss) in AOCI			Gain (Loss) reclassified to Continuing Operations			Reclassified to Discontinued Operations
Interest rate swaps	Interest expense	$	(0.7	)	$	(1.3	)	$	—
Commodity swaps	Cost of goods sold	6.2			0.7			4.7
Net investment hedge	Other (expense) income, net	(24.0		)	—			—
Foreign exchange contracts	Net sales	0.4			—			—
Foreign exchange contracts	Cost of goods sold	(13.5		)	0.1			6.6
		$	(31.6	)	$	(0.5	)	$	11.3

Fiscal 2016	Classification	Effective Portion
		Gain (Loss) in AOCI			Gain (Loss) reclassified to Continuing Operations			Reclassified to Discontinued Operations
Interest rate swaps	Interest expense	$	(0.4	)	$	(1.9	)	$	—
Commodity swaps	Cost of goods sold	4.5			(1.4		)	(2.3		)
Net investment hedge	Other (expense) income, net	0.6			—			—
Foreign exchange contracts	Net sales	(0.4		)	(0.2		)	—
Foreign exchange contracts	Cost of goods sold	6.8			1.2			5.7
		$	11.1		$	(2.3	)	$	3.4

Fiscal 2015	Classification	Effective Portion
		Gain (Loss) in AOCI			Gain (Loss) reclassified to Continuing Operations			Reclassified to Discontinued Operations
Interest rate swaps	Interest expense	$	(3.4	)	$	(1.9	)	$	—
Commodity swaps	Cost of goods sold	(7.1		)	(0.5		)	(0.2		)
Foreign exchange contracts	Net sales	0.1			0.1			—
Foreign exchange contracts	Cost of goods sold	21.8			25.4			4.6
		$	11.4		$	23.1		$	4.4

Spectrum Brands [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net

$ (31.6)

$ 11.1

$ 11.4

Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net

$ (0.5)

$ (2.3)

23.1

Derivative Instruments, Income Statement Location of Gain (Loss) Reclassified from Accumulated OCI

11.3

3.4

Spectrum Brands [Member] | Zinc Commodity Swap Contract [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net

$ 0.2

Spectrum Brands [Member] | Interest Rate Contract [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Derivative, Notional Amount

$ 300.0

$ 300.0

Derivative, Remaining Maturity

2 years 7 months

6 months

Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net

$ 0.3

Spectrum Brands [Member] | Foreign exchange contracts

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Contracts Market Value

67.5

$ 29.9

Spectrum Brands [Member] | Bronze Commodity Contract [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Contracts Market Value

6.6

4.0

Spectrum Brands [Member] | Sales Revenue, Net [Member] | Foreign exchange contracts

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net

0.4

(0.4)

0.1

Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net

$ 0.0

$ (0.2)

$ 0.1

Derivative Instruments, Income Statement Location of Gain (Loss) Reclassified from Accumulated OCI

0

0

4.6

Spectrum Brands [Member] | Consumer products cost of goods sold classification | Commodity contracts

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net

$ 6.2

$ 4.5

Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net

$ 0.7

$ (1.4)

$ (0.5)

Derivative Instruments, Income Statement Location of Gain (Loss) Reclassified from Accumulated OCI

4.7

-2.3

-.20

Spectrum Brands [Member] | Consumer products cost of goods sold classification | Foreign exchange contracts

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net

$ (13.5)

$ 6.8

$ 21.8

Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net

$ 0.1

$ 1.2

$ 25.4

Derivative Instruments, Income Statement Location of Gain (Loss) Reclassified from Accumulated OCI

6.6

5.7

4.4

Spectrum Brands [Member] | Consumer products cost of goods sold classification | Commodity Option [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net

$ (7.1)

Spectrum Brands [Member] | Other (expense) income, net | Net Investment Hedging [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net

$ (24.0)

$ 0.6

Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net

$ 0.0

$ 0.0

Derivative Instruments, Income Statement Location of Gain (Loss) Reclassified from Accumulated OCI

0

0

0

Spectrum Brands [Member] | Interest Expense [Member] | Interest Rate Swap [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net

$ (0.7)

$ (0.4)

$ (3.4)

Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net

$ (1.3)

$ (1.9)

$ (1.9)

Derivative Instruments, Income Statement Location of Gain (Loss) Reclassified from Accumulated OCI

0

0

0