Shares And Stockholders' Equity (Schedule of Reclassifications Out Of AOCI) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized (gain) loss	$ (54)	$ (85)
Net investment income	1,150	1,166
Interest and debt expense	64	68
Commissions and other expenses	895	856
Income (loss) from continuing operations before taxes	305	308
Federal income tax expense (benefit)	66	64
Net income (loss)	239	243
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gain (Loss) On AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before taxes	(14)
Federal income tax expense (benefit)	5
Net income (loss)	(9)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized OTTI On AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before taxes	38
Federal income tax expense (benefit)	(14)
Net income (loss)	24
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before taxes	(1)
Net income (loss)	(1)
Gross Reclassification [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gain (Loss) On AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized (gain) loss	(6)
Gross Reclassification [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized OTTI On AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized (gain) loss	43
Gross Reclassification [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Nonoperating income expense	(2)
Gross Reclassification [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member] | Interest Rate Contract [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment income	(5)
Interest and debt expense	1
Gross Reclassification [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member] | Foreign Exchange Contract [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment income	2
Change In DAC, VOBA, DSI, And DFEL [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gain (Loss) On AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized (gain) loss	(8)
Change In DAC, VOBA, DSI, And DFEL [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized OTTI On AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized (gain) loss	(5)
Change In DAC, VOBA, DSI, And DFEL [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Commissions and other expenses	$ 1