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Derivative Financial Instruments (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011
Net investment gains (losses):
Total net investment gains	$ (51,134)	$ (13,804)	$ 82,648	$ (13,804)
Net investment income:
Available-for-sale embedded derivatives		(13,796)		(13,796)
Total	(50,758)		83,048
Call options [Member]
Net investment gains (losses):
Total net investment gains	(44,557)	(15,400)	48,722	(15,400)
Futures contract [Member]
Net investment gains (losses):
Total net investment gains	(6,577)	1,596	33,926	1,596
Available-for-sale embedded derivative [Member]
Net investment income:
Available-for-sale embedded derivatives	376	8	400	8
FIA embedded derivative [Member]
Benefits and other changes in policy reserves:
FIA embedded derivatives	$ (10,338)	$ (21,802)	$ 90,125	$ (21,802)