Shares And Stockholders' Equity (Schedule of Reclassifications Out Of AOCI) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gain (loss)										$ (135)	$ 74
Net investment income									4,859	4,754	4,698
Interest Expense, Debt									267	265	273
Commissions and other expenses									4,079	3,701	3,683
Income (loss) from continuing operations before taxes									1,997	1,631	1,568
Federal income tax expense (benefit)									483	387	282
Net income (loss)	349	439	398	329	351	337	317	239	1,515	1,244	1,313
Unrealized Gain (Loss) on AFS Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before taxes									(22)	(96)
Federal income tax expense (benefit)									8	34
Unrealized OTTI on AFS Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before taxes									38	54
Federal income tax expense (benefit)									(12)	(19)
Unrealized Gain (Loss) on Derivative Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before taxes									(18)	(14)
Federal income tax expense (benefit)									6	5
Parent Company [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment income									1		1
Income (loss) from continuing operations before taxes									593	516	477
Federal income tax expense (benefit)									(77)	(73)	(85)
Net income (loss)									1,515	1,244	1,313
Gross Reclassification [Member] | Unrealized Gain (Loss) on AFS Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gain (loss)									10	(67)
Gross Reclassification [Member] | Unrealized OTTI on AFS Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gain (loss)									43	62
Gross Reclassification [Member] | Unrealized Gain (Loss) on Derivative Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Nonoperating income expense									(19)	(15)
Gross Reclassification [Member] | Unrealized Gain (Loss) on Derivative Instruments | Interest Rate Contract [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment income									(22)	(21)
Interest Expense, Debt									3	3
Gross Reclassification [Member] | Unrealized Gain (Loss) on Derivative Instruments | 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
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gain (loss)									(32)	(29)
Change In DAC, VOBA, DSI, And DFEL [Member] | Unrealized OTTI on AFS Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gain (loss)									(5)	(8)
Change In DAC, VOBA, DSI, And DFEL [Member] | Unrealized Gain (Loss) on Derivative Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Commissions and other expenses									1	1
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gain (Loss) on AFS Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)									(14)	(62)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized OTTI on AFS Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)									26	35
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gain (Loss) on Derivative Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)									$ (12)	$ (9)