Expenses Associated With Long-Duration Insurance Products (Schedule Of Deferred Acquisition Cost and Future Policy Benefits Payable With Our Long-Duration Insurance Products) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Expenses Associated With Long-Duration Insurance Products [Abstract]
Other long-term assets, Deferred acquisition Costs	$ 114	$ 74
Trade accounts payable and accrued expenses, Deferred acquisition Cost	0	0
Long-term liabilities, Deferred acquisition Cost	0	0
Total asset (liability), Deferred acquisition Cost	114	74
Other long-term assets, Future policy benefits payable	0	0
Trade accounts payable and accrued expenses, Future policy benefits payable	(58)	(53)
Long-term liabilities, Future policy benefits payable	(1,663)	(1,493)
Total asset (liability), Future policy benefits payable	$ (1,721)	$ (1,546)