Shares and Stockholders' Equity (Components And Changes In Accumulated OCI) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Components And Changes In Accumulated Other Comprehensive Income [Line Items]
Balance as of beginning-of-year	$ 1,563
Increases Attributable To
Gross OTTI recognized in OCI	(7)	(7)
Less:
Balance as of end-of-period	2,453
Unrealized Gain (Loss) On AFS Securities [Member]
Components And Changes In Accumulated Other Comprehensive Income [Line Items]
Balance as of beginning-of-year	1,609	4,066
Unrealized holding gains (losses) arising during the year	2,003	(732)
Change in foreign currency exchange rate adjustment	2	(13)
Change in DAC, VOBA, DSI, future contract benefits and other contract holder funds	(604)	286
Income tax benefit (expense)	(490)	161
Less:
Reclassification adjustment for gains (losses) included in net income (loss)	2	(6)
Associated amortization of DAC, VOBA, DSI, and DFEL	(7)	(8)
Income tax benefit (expense)	2	5
Less:
Balance as of end-of-period	2,523	3,777
Unrealized OTTI On AFS Securities [Member]
Components And Changes In Accumulated Other Comprehensive Income [Line Items]
Balance as of beginning-of-year	(78)	(107)
Increases Attributable To
Gross OTTI recognized in OCI	(7)	(7)
Change in DAC, VOBA, DSI and DFEL		1
Income tax benefit (expense)	2	2
Decreases attributable to
Sales, maturities or other settlements of AFS securities	7	43
Change in DAC, VOBA, DSI, and DFEL	(1)	(5)
Income tax benefit (expense)	(2)	(14)
Less:
Balance as of end-of-period	(79)	(87)
Unrealized Gain (Loss) on Derivative Instruments [Member]
Components And Changes In Accumulated Other Comprehensive Income [Line Items]
Balance as of beginning-of-year	256	163
Change in foreign currency exchange rate adjustment	(2)	11
Decreases attributable to
Unrealized holding gains (losses) arising during the year	(30)	48
Change in DAC, VOBA, DSI and DFEL		2
Income tax benefit (expense)	11	(22)
Less:
Reclassification adjustment for gains (losses) included in net income (loss)	(6)	(2)
Associated amortization of DAC, VOBA, DSI and DFEL		1
Income tax benefit (expense)	2
Balance as of end-of-period	239	203
Foreign Currency Translation Adjustment [Member]
Components And Changes In Accumulated Other Comprehensive Income [Line Items]
Balance as of beginning-of-year	(5)	(4)
Change in foreign currency exchange rate adjustment	(5)	(3)
Less:
Income tax benefit (expense)		1
Balance as of end-of-period	(10)	(6)
Funded Status Of Employee Benefit Plans [Member]
Components And Changes In Accumulated Other Comprehensive Income [Line Items]
Balance as of beginning-of-year	(219)	(310)
Less:
Adjustment arising during the period	(1)	6
Income tax benefit (expense)		(2)
Balance as of end-of-period	$ (220)	$ (306)