Fair Value of Financial Instruments (Changes In Unrealized Gains (Losses) Within Level 3 Financial Instruments Carried At Fair Value And Still Held) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held
Total, net	$ 557		$ 760
Derivative Investments [Member]
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held
Change in unrealized gains (losses) included in realized gain (loss)	(197)	[1]	(520)	[1]
Indexed Annuity Contracts Embedded Derivatives [Member]
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held
Change in unrealized gains (losses) included in realized gain (loss)	(23)	[1]	21	[1]
GLB Embedded Derivative Reserves [Member]
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held
Change in unrealized gains (losses) included in realized gain (loss)	761	[1]	1,183	[1]
VIE's Liabilities - Derivative Instruments [Member]
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held
Change in unrealized gains (losses) included in realized gain (loss)	15	[1]	70	[1]
Credit Default Swaps [Member]
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held
Change in unrealized gains (losses) included in investment income	$ 1	[2]	$ 6	[2]

[1] Included in realized gain (loss) on our Consolidated Statements of Comprehensive Income (Loss).

[2] Included in net investment income on our Consolidated Statements of Comprehensive Income (Loss).