Shares And Stockholders' Equity (Schedule of Reclassifications Out Of AOCI) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total realized gain (loss)									$ (151)		$ (135)
Net investment income									4,827	$ 4,859	4,754
Interest and debt expense									272	267	265
Commissions and other expenses									4,318	4,079	3,701
Income (loss) from continuing operations before taxes									1,430	1,997	1,631
Federal income tax expense (benefit)									276	483	387
Net income (loss)	$ 283	$ 227	$ 344	$ 300	$ 349	$ 439	$ 398	$ 329	1,154	1,515	1,244
Unrealized Gain (Loss) on AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before taxes									118	(22)	(96)
Federal income tax expense (benefit)									(41)	8	34
Net income (loss)									77	(14)	(62)
Unrealized OTTI on AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before taxes									2	60	92
Federal income tax expense (benefit)										(21)	(32)
Net income (loss)									2	39	60
Unrealized Gain (Loss) on Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before taxes									(182)	(18)	(14)
Federal income tax expense (benefit)									64	6	5
Net income (loss)									(118)	(12)	(9)
Parent Company [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment income										1
Income (loss) from continuing operations before taxes									996	593	516
Federal income tax expense (benefit)									(66)	(77)	(73)
Net income (loss)									1,154	1,515	1,244
Gross Reclassification [Member] | Unrealized Gain (Loss) on AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total realized gain (loss)									145	10	(67)
Gross Reclassification [Member] | Unrealized OTTI on AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total realized gain (loss)									2	65	100
Gross Reclassification [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Nonoperating income expense									(183)	(19)	(15)
Gross Reclassification [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member] | Interest rate contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment income									(190)	(22)	(21)
Interest and debt expense									1	3	3
Gross Reclassification [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member] | Foreign currency contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment income									6		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)									(27)	(32)	(29)
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)										(5)	(8)
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	$ 1	$ 1