Derivative Financial Instruments - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended					3 Months Ended	6 Months Ended						6 Months Ended
	Mar. 31, 2013	Apr. 01, 2012	Mar. 31, 2013	Apr. 01, 2012	Sep. 30, 2012	Mar. 31, 2013 Futures contracts [Member] Contract	Sep. 30, 2012 Futures contracts [Member] Contract	Mar. 31, 2013 Commodity contracts [Member] Other Income Expense [Member]	Mar. 31, 2013 Commodity contracts [Member] Other Income Expense [Member]	Feb. 14, 2013 Swap [Member] Natural Gas Commodity Contract [Member] Btu	Mar. 31, 2013 Spectrum Brands [Member]	Sep. 30, 2012 Spectrum Brands [Member]	Mar. 31, 2013 Spectrum Brands [Member] Standby Letters of Credit [Member]	Sep. 30, 2012 Spectrum Brands [Member] Standby Letters of Credit [Member]	Mar. 31, 2013 Spectrum Brands [Member] Interest rate swap agreements [Member] T	Mar. 31, 2013 Spectrum Brands [Member] Foreign exchange contracts [Member]	Mar. 31, 2013 Remainder of 2013 [Member] Swap [Member] Natural Gas Commodity Contract [Member]	Mar. 31, 2013 Remainder of 2013 [Member] Swap [Member] Oil Commodity Contract [Member]	Feb. 14, 2013 Remainder of 2013 [Member] Swap [Member] Oil Commodity Contract [Member] bbl	Mar. 31, 2013 2014 [Member] Swap [Member] Natural Gas Commodity Contract [Member]	Mar. 31, 2013 2014 [Member] Swap [Member] Oil Commodity Contract [Member]
Derivative Financial Instruments [Line Items]
Contract value															$ 19,900,000	$ 147,000,000
Derivative net loss/gain															(300,000)	1,000,000
Derivative net loss/gain, net of tax benefit/expense															100,000	600,000
Derivative net loss/gain, non-controlling interest															200,000	800,000
Estimated amount of derivative net losses/gains to be reclassified from AOCI into earnings over the next twelve months	0	(1,100,000)	(500,000)	(3,500,000)											(300,000)	1,100,000
Weight of raw materials under derivative contract															10
Notional value for such foreign exchange derivative contracts outstanding											132,200,000	172,600,000
Non-cash change in fair value of derivative financial instruments								(9,400,000)	(9,400,000)
Derivative, mitigating price volatility, natural gas covered										13,365,300
Derivative, mitigating price volatility, oil covered																			408,000
Derivative forward price																	96.78	4.12		92.75	4.23
Percentage of production volume covered by derivative financial instruments	54.40%		54.40%
Credit reserve on its derivative assets												100,000
Cash collateral						4,600,000	9,800,000				500,000	100,000
Standby letters of credit													0	0
Call options purchased to match the funding requirements			Call options are one, two and three year options
FGL purchases call options to fund the next index credit			One, two or three year call options to fund the next index credit
Maximum amount of loss due to credit risk	$ 262,000,000		$ 262,000,000		$ 200,700,000
Futures contracts						1,329	2,835