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Derivative Financial Instruments - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Dec. 30, 2012
Jan. 01, 2012
Sep. 30, 2012
Derivative Financial Instruments [Line Items]      
Estimated amount of derivative net losses/gains to be reclassified from AOCI into earnings over the next twelve months $ (0.5) $ (2.4)  
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 152.5   200.7
Futures contracts [Member]
      
Derivative Financial Instruments [Line Items]      
Cash collateral 6.9   9.8
Futures contracts 2,001   2,835
Spectrum Brands [Member]
      
Derivative Financial Instruments [Line Items]      
Notional value for such foreign exchange derivative contracts outstanding 162.8   172.6
Credit reserve on its derivative assets     0.1
Cash collateral 0.5   0.1
Spectrum Brands [Member] | Standby Letters of Credit [Member]
      
Derivative Financial Instruments [Line Items]      
Standby letters of credit 0   0
Spectrum Brands [Member] | Interest rate swap agreements [Member]
      
Derivative Financial Instruments [Line Items]      
Contract value 24.3    
Derivative net loss/gain 0.9    
Derivative net loss/gain, net of tax benefit/expense 0.3    
Derivative net loss/gain, non-controlling interest 0.6    
Estimated amount of derivative net losses/gains to be reclassified from AOCI into earnings over the next twelve months 0.5    
Weight of raw materials under derivative contract 12    
Spectrum Brands [Member] | Foreign exchange contracts [Member]
      
Derivative Financial Instruments [Line Items]      
Contract value 173.0    
Derivative net loss/gain (0.6)    
Derivative net loss/gain, net of tax benefit/expense 0.4    
Derivative net loss/gain, non-controlling interest 0.4    
Estimated amount of derivative net losses/gains to be reclassified from AOCI into earnings over the next twelve months $ (0.6)