Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2013
Income Taxes [Line Items]
Effective income tax rate	27.50%	23.70%	48.34152%	55.10%
Increase Decrease In Fair Value Of Equity Conversion Feature Of Preferred Stock	$ (38.0)	$ (52.6)	$ 12.7	$ (81.9)
Unrecognized tax benefits	11.9		11.9		13.8
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	8.2		8.2		10.1
Current Foreign Tax Expense (Benefit)			2.0
Uncertain tax positions [Member]
Income Taxes [Line Items]
Accrued interest and penalties related to the uncertain tax positions	3.7		3.7		3.7
FGL [Member] | U S Federal [Member]
Income Taxes [Line Items]
Increase In Valuation Allowance Due To Acquisition			35.0
Spectrum Brands [Member] | U S Federal [Member]
Income Taxes [Line Items]
Increase In Valuation Allowance Due To Acquisition				49.3
Repatriation of foreign earnings [Member]
Income Taxes [Line Items]
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount			$ 178.7