Insurance Premiums (Roll Forward Of Premiums Receivable) (Details) (Non Variable Interest Entities [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010
Non Variable Interest Entities [Member]
Premiums Receivable, Beginning balance	$ 1,589		$ 2,021
Accounting Transition Adjustment			(150)	[1]
Premium Payments Received	(212)		(253)
Premiums from New Business Written			12
Adjustments, Changes in Expected Term of Policies	(76)		(42)
Adjustments, Accretion of Premiums Receivable Discount	40		48
Adjustments, Other	19	[2]	(47)	[2]
Premiums Receivable, Ending balance	1,360		1,589
Reinsurance Premiums Payable	$ 64		$ 71

[1] Reflects the adoption of the accounting principles for the consolidation of VIEs.

[2] Primarily consists of unrealized gains (losses) due to foreign currency exchange rates.