Shares And Stockholders' Equity (Schedule of Reclassifications Out Of AOCI) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total realized gain (loss)	$ 10	$ 35	$ (38)	$ 16
Net investment income	1,187	1,207	2,374	2,415
Interest and debt expense	69	67	137	134
Commissions and other expenses	1,014	963	2,027	1,934
Income (loss) from continuing operations before taxes	449	537	811	963
Federal income tax expense (benefit)	105	139	167	236
Net income (loss)	$ 344	$ 398	644	727
Unrealized Gain (Loss) On AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before taxes			178	(9)
Federal income tax expense (benefit)			(62)	3
Net income (loss)			116	(6)
Unrealized OTTI On AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before taxes			17	33
Federal income tax expense (benefit)			(6)	(12)
Net income (loss)			11	21
Unrealized Gain (Loss) on Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before taxes			(189)	(9)
Federal income tax expense (benefit)			66	3
Net income (loss)			(123)	(6)
Gross Reclassification [Member] | Unrealized Gain (Loss) On AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total realized gain (loss)			193	9
Gross Reclassification [Member] | Unrealized OTTI On AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total realized gain (loss)			31	36
Gross Reclassification [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Nonoperating income expense			(189)	(10)
Gross Reclassification [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			(194)	(12)
Interest and debt expense			2	2
Gross Reclassification [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member] | Foreign Currency Contract [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment income			3
Change In DAC, VOBA, DSI, And DFEL [Member] | Unrealized Gain (Loss) On AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total realized gain (loss)			(15)	(18)
Change In DAC, VOBA, DSI, And DFEL [Member] | Unrealized OTTI On AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total realized gain (loss)			$ (14)	(3)
Change In DAC, VOBA, DSI, And DFEL [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Commissions and other expenses				$ 1