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Derivative Financial Instruments (Details 3) (USD $)
In Thousands, unless otherwise specified
Jul. 01, 2012
Sep. 30, 2011
Insurance and Financial Services:
   
Derivative Fair Value of Derivative Net [Abstract]    
Total asset derivatives $ 160,565 $ 52,335
Total liability derivatives 1,486,465 1,400,568
Call options [Member]
   
Derivative Fair Value of Derivative Net [Abstract]    
Total asset derivatives 156,919 52,335
Call options [Member] | Insurance and Financial Services:
   
Derivative Fair Value of Derivative Net [Abstract]    
Total asset derivatives 156,919 52,335
Futures contract [Member] | Insurance and Financial Services:
   
Derivative Fair Value of Derivative Net [Abstract]    
Total asset derivatives 3,646  
Total liability derivatives   3,828
FIA embedded derivative [Member] | Insurance and Financial Services:
   
Derivative Fair Value of Derivative Net [Abstract]    
Total liability derivatives 1,486,465 1,396,340
Available-for-sale embedded derivative [Member] | Insurance and Financial Services:
   
Derivative Fair Value of Derivative Net [Abstract]    
Total liability derivatives   $ 400