Shares And Stockholders' Equity (Schedule of Reclassifications Out Of AOCI) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total realized gain (loss)	$ 37	$ 27	$ (121)	$ (11)
Net investment income	1,259	1,254	3,630	3,627
Interest and debt expense	66	67	202	204
Commissions and other expenses	1,283	1,432	3,236	3,459
Income (loss) from continuing operations before taxes	612	268	1,262	1,078
Federal income tax expense (benefit)	145	41	263	207
Net income (loss)	$ 467	$ 227	999	871
Unrealized Gain (Loss) on AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before taxes			(145)	152
Federal income tax expense (benefit)			51	(53)
Net income (loss)			(94)	99
Unrealized OTTI on AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before taxes			1	18
Federal income tax expense (benefit)				(6)
Net income (loss)			1	12
Unrealized Gain (Loss) on Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before taxes			11	(185)
Federal income tax expense (benefit)			(4)	65
Net income (loss)			7	(120)
Gross Reclassification [Member] | Unrealized Gain (Loss) on AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total realized gain (loss)			(131)	175
Gross Reclassification [Member] | Unrealized OTTI on AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total realized gain (loss)			1	31
Gross Reclassification [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Nonoperating income expense			12	(187)
Gross Reclassification [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member] | Interest rate contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total realized gain (loss)			1
Net investment income			4	(193)
Interest and debt expense			(6)	1
Gross Reclassification [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member] | Foreign currency contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total realized gain (loss)			6
Net investment income			7	5
Associated amortization of 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)			(14)	(23)
Associated amortization of 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)	2
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)				$ (13)