Derivative Financial Instruments - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended		15 Months Ended				3 Months Ended	9 Months Ended						9 Months Ended				9 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jul. 01, 2012	Jul. 01, 2013	Sep. 30, 2012	Jun. 30, 2013 Futures contracts [Member] Contract	Sep. 30, 2012 Futures contracts [Member] Contract	Jun. 30, 2013 Commodity contracts [Member] Other Income Expense [Member]	Jun. 30, 2013 Commodity contracts [Member] Other Income Expense [Member]	Feb. 14, 2013 Swap [Member] Natural Gas Commodity Contract [Member] MMBTU	Jun. 30, 2013 Spectrum Brands [Member]	Sep. 30, 2012 Spectrum Brands [Member]	Jun. 30, 2013 Spectrum Brands [Member] Standby Letters of Credit [Member]	Sep. 30, 2012 Spectrum Brands [Member] Standby Letters of Credit [Member]	Jun. 30, 2013 Spectrum Brands [Member] Zinc Commodity Swap Contract [Member] T	Jun. 30, 2013 Spectrum Brands [Member] Interest rate swap agreements [Member]	Jun. 30, 2013 Spectrum Brands [Member] Silver Commodity Swap Contract [Member] ozt	Jun. 30, 2013 Spectrum Brands [Member] Bronze Commodity Contract [Member]	Jun. 30, 2013 Spectrum Brands [Member] Foreign exchange contracts [Member]	Jun. 30, 2013 Remainder of 2013 [Member] Swap [Member] Natural Gas Commodity Contract [Member]	Jun. 30, 2013 Remainder of 2013 [Member] Swap [Member] Oil Commodity Contract [Member]	Feb. 14, 2013 Remainder of 2013 [Member] Swap [Member] Oil Commodity Contract [Member] MBbls	Jun. 30, 2013 2014 [Member] Swap [Member] Natural Gas Commodity Contract [Member]	Jun. 30, 2013 2014 [Member] Swap [Member] Oil Commodity Contract [Member]
Derivative Financial Instruments [Line Items]
Contract value															$ 20,400,000		$ 0	$ 5,600,000	$ 228,400,000
Derivative net loss/gain																(700,000)			2,400,000
Derivative net loss/gain, net of tax benefit/expense																100,000			1,500,000
Derivative net loss/gain, non-controlling interest																400,000			1,700,000
Estimated amount of derivative net losses/gains to be reclassified from AOCI into earnings over the next twelve months	600,000	100,000	(3,200,000)	300,000												(600,000)			2,200,000
Derivative, Notional Amount	6,293,200,000	6,293,200,000			5,830,400,000						112,700,000	172,600,000
Weight of raw materials under derivative contract															10		60
Non-cash change in fair value of derivative financial instruments								11,500,000	2,100,000
Derivative, mitigating price volatility, natural gas covered										13,365,300,000
Derivative, mitigating price volatility, oil covered																						408,000
Derivative, Average Forward Price																				95.12	3.64		89.97	3.91
Percentage of production volume covered by derivative financial instruments	76.80%	69.70%
Credit reserve on its derivative assets												100,000
Cash collateral						4,300,000	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	$ 227,400,000	$ 227,400,000			$ 200,700,000
Futures contracts						1,244	2,835