Investments (Details) (USD $)	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Schedule Of Available For Sale Securities Residential And Commercial Mortgage At Risk [Line Items]
Total OTTI for AFS securities backed by pools of residential and commercial mortgages			$ 34,000,000	$ 44,000,000
OTTI for AFS securities backed by pools of residential and commercial mortgages recognized in OCI			(3,000,000)	4,000,000
OTTI for AFS securities backed by pools of residential and commercial mortgages recognized in net income (loss)			37,000,000	40,000,000
Available For Sale Securities In Unrealized Loss Position With Loss Severity Greater Than 20 Percent [Line Items]
Fair Value	816,000,000		816,000,000		1,055,000,000
Gross Unrealized Losses	427,000,000		427,000,000		625,000,000
Gross Unrealized OTTI	180,000,000		180,000,000		155,000,000
Number of securities	213		213		256
Decrease in gross AFS securities unrealized losses			258,000,000
Balance as of beginning of year	410,000,000	352,000,000	390,000,000	319,000,000
Increases attributable to:
Credit losses on securities for which an OTTI was not previously recognized	21,000,000	3,000,000	56,000,000	29,000,000
Credit losses on securities for which an OTTI was previously recognized	19,000,000	19,000,000	42,000,000	40,000,000
Decreases attributable to:
Securities sold	(35,000,000)	(34,000,000)	(73,000,000)	(48,000,000)
Balance as of end of year	415,000,000	340,000,000	415,000,000	340,000,000
Other Than Temporary Impairments Credit Losses [Line Items]
Amortized Cost	982,000,000		982,000,000		876,000,000
Gross Unrealized Gains	6,000,000		6,000,000		2,000,000
Gross Unrealized Losses and OTTI	(219,000,000)		(219,000,000)		(205,000,000)
Fair Value	769,000,000		769,000,000		673,000,000
OTTI in Credit Losses	415,000,000	340,000,000	415,000,000	340,000,000
Mortgage Loans On Real Estate Aging [Abstract]
Current	6,736,000,000		6,736,000,000		6,858,000,000
Sixty to ninety days past due	3,000,000		3,000,000		26,000,000
Greater than ninety days past due	80,000,000		80,000,000		76,000,000
Valuation allowance associated with impaired mortgage loans on real estate	26,000,000		26,000,000
Unamortized premium (discount)	11,000,000		11,000,000		13,000,000
Total carrying value	6,804,000,000		6,804,000,000		6,942,000,000
Information about impaired mortgage loans on real estate
Number of impaired mortgage loans on real estate	9		9		12
Principal balance of impaired mortgage loans on real estate	66,000,000		66,000,000		100,000,000
Valuation allowance associated with impaired mortgage loans on real estate	26,000,000		26,000,000
Carrying value of impaired mortgage loans on real estate	40,000,000		40,000,000		69,000,000
Average carrying value for impaired loans on real estate	49,000,000	53,000,000	56,000,000	54,000,000
Recognized interest income on impaired mortgage loans on real estate	0	0	0	1,000,000
Amount of interest income collected on impaired mortgage loans on real estate	0	1,000,000	0	2,000,000
Largest mortgage loan concentration in geographic region	31.00%		31.00%		32.00%
Financing Receivable Allowance For Credit Losses [Roll Forward]
Balance as of beginning-of-year			(31,000,000)
Balance as of end-of-period	(26,000,000)		(26,000,000)
Mortgage Loans Credit Quality [Line Items]
Principal amount of mortgage loans on real estate	6,819,000,000		6,819,000,000		6,960,000,000
Percentage of total mortgage loans on real estate	100.00%		100.00%		100.00%
Alternative investments [Abstract]
Number of partnerships in alternative investment portfolio	97		97		96
Realized gain (loss) related to certain investments
Fixed maturity AFS securities, Gross gains	3,000,000	31,000,000	8,000,000	67,000,000
Fixed maturity AFS securities, Gross losses	(49,000,000)	(51,000,000)	(112,000,000)	(114,000,000)
Equity AFS securities, Gross gains	0	1,000,000	1,000,000	9,000,000
Gain (loss) on other investments	(5,000,000)	(8,000,000)	2,000,000	5,000,000
Associated amortization expense of DAC, VOBA, DSI and DFEL and changes in other contract holder funds	0	(5,000,000)	2,000,000	(14,000,000)
Total realized gain (loss) related to certain investments	(51,000,000)	(32,000,000)	(99,000,000)	(47,000,000)
OTTI Recognized in Net Income (Loss)
Gross OTTI recognized in net income (loss)	(40,000,000)	(40,000,000)	(97,000,000)	(91,000,000)
Associated amortization expense of DAC, VOBA, DSI and DFEL	7,000,000	9,000,000	17,000,000	19,000,000
Net OTTI recognized in net income (loss), pre-tax	(33,000,000)	(31,000,000)	(80,000,000)	(72,000,000)
Portion of OTTI Recognized in OCI
Gross OTTI recognized in OCI	21,000,000	19,000,000	79,000,000	27,000,000
Change in DAC, VOBA, DSI and DFEL	(4,000,000)	(3,000,000)	(12,000,000)	(8,000,000)
Net portion of OTTI recognized in OCI, pre-tax	17,000,000	16,000,000	67,000,000	19,000,000
Carrying Value Of Payables For Collateral On Investments [Abstract]
Collateral payable held for derivative investments	3,441,000,000		3,441,000,000		2,980,000,000
Securities pledged under securities lending agreements	200,000,000		200,000,000		200,000,000
Securities pledged under reverse repurchase agreements	280,000,000		280,000,000		280,000,000
Securities pledged for Treasury Asset-Backed Securities Loan Facility ('TALF')	49,000,000		49,000,000		173,000,000
Investments pledged for Federal Home Loan Bank of Indianapolis ('FHLBI')	1,100,000,000		1,100,000,000		100,000,000
Total payables for collateral on investments	5,070,000,000		5,070,000,000		3,733,000,000
Fair Value Of Related Investments Or Collateral [Abstract]
Collateral payable held for derivative investments	3,441,000,000		3,441,000,000		2,980,000,000
Securities pledged under securities lending agreements	194,000,000		194,000,000		193,000,000
Securities pledged under reverse repurchase agreements	293,000,000		293,000,000		294,000,000
Securities pledged for Treasury Asset-Backed Securities Loan Facility ('TALF')	66,000,000		66,000,000		199,000,000
Investments pledged for Federal Home Loan Bank of Indianapolis('FHLBI')	2,013,000,000		2,013,000,000		142,000,000
Total payables for collateral on investments	6,007,000,000		6,007,000,000		3,808,000,000
Percentage of the fair value of domestic securities obtained as collateral under securities lending agreements	102.00%		102.00%		102.00%
Percentage of the fair value of foreign securities obtained as collateral under securities lending agreements	105.00%		105.00%		105.00%
Percentage of the fair value of securities obtained as collateral under reverse repurchase agreements	95.00%		95.00%		95.00%
Percentage of the fair value of TALF securities obtained as collateral under securities pledged for TALF	90.00%		90.00%		90.00%
Percentage of the fair value of FHLBI securities obtained as collateral under securities pledged for FHLBI for AFS Securities (low end of range)	105.00%		105.00%		105.00%
Percentage of the fair value of FHLBI securities obtained as collateral under securities pledged for FHLBI for AFS Securities (high end of range)	115.00%		115.00%		115.00%
Percentage of the fair value of FHLBI securities obtained as collateral under securities pledged for FHLBI for mortgage loan (low end of range)	155.00%		155.00%		155.00%
Percentage of the fair value of FHLBI securities obtained as collateral under securities pledged for FHLBI for mortgage loan (high end of range)	175.00%		175.00%		175.00%
Increase (decrease) in payables for collateral on investments
Collateral payable held for derivative investments			461,000,000	223,000,000
Securities pledged under securities lending agreements			0	1,000,000
Securities pledged for TALF			(124,000,000)	(78,000,000)
Securities pledged for FHLBI			1,000,000,000	0
Total increase (decrease) in payables for collateral on investments			1,337,000,000	146,000,000
Investment commitments	754,000,000		754,000,000
Investment commitments for limited partnerships	233,000,000		233,000,000
Investment commitments for private placements	399,000,000		399,000,000
Investment commitments for mortgage loans on real estate	182,000,000		182,000,000
Federal Home Loan Mortgage Corporation [Member]
Concentration Risk [Line Items]
Fair value	4,500,000,000		4,500,000,000		5,000,000,000
Concentration risk, percentage	5.00%		5.00%		5.00%
Fannie Mae [Member]
Concentration Risk [Line Items]
Fair value	2,500,000,000		2,500,000,000		2,600,000,000
Concentration risk, percentage	3.00%		3.00%		3.00%
Cmo Industry [Member]
Concentration Risk [Line Items]
Fair value	5,000,000,000		5,000,000,000		5,600,000,000
Concentration risk, percentage	5.00%		5.00%		6.00%
Electric Industry [Member]
Concentration Risk [Line Items]
Fair value	8,100,000,000		8,100,000,000		7,700,000,000
Concentration risk, percentage	8.00%		8.00%		8.00%
Corporate bonds [Member]
Evaluation Of Credit Losses [Line Items]
Percentage of fair value rated as investment grade	96.00%		96.00%		96.00%
Amortized cost of portfolio rated below investment grade	2,700,000,000		2,700,000,000		2,600,000,000
Fair value of portfolio rated below investment grade	2,500,000,000		2,500,000,000		2,400,000,000
OTTI securities recognized in net income (loss), Recovery percentage of amortized cost	92.00%	98.00%	92.00%	98.00%
CDOs [Member]
Evaluation Of Credit Losses [Line Items]
Percentage of fair value rated as investment grade	98.00%		98.00%		97.00%
Amortized cost of portfolio rated below investment grade	3,000,000		3,000,000		3,000,000
Fair value of portfolio rated below investment grade	3,000,000		3,000,000		3,000,000
OTTI securities recognized in net income (loss), Recovery percentage of amortized cost	0.00%	0.00%	0.00%	0.00%
MBS [Member]
Evaluation Of Credit Losses [Line Items]
Projected default rate on existing delinquencies on MBS (low end of range)	25.00%		25.00%		25.00%
Projected default rate on existing delinquencies on MBS (high end of range)	100.00%		100.00%		100.00%
Severity of second lien loans	100.00%		100.00%		100.00%
Severity of first lien loans	30.00%		30.00%		30.00%
Fixed maturity securities [Member] \| Corporate bonds [Member]
OTTI Recognized in Net Income (Loss)
Gross OTTI recognized in net income (loss)	(10,000,000)	(2,000,000)	(29,000,000)	(6,000,000)
Fixed maturity securities [Member] \| CDOs [Member]
OTTI Recognized in Net Income (Loss)
Gross OTTI recognized in net income (loss)	0	0	0	(1,000,000)
Fixed maturity securities [Member] \| Hybrid and redeemable preferred securities [Member]
OTTI Recognized in Net Income (Loss)
Gross OTTI recognized in net income (loss)	0	0	0	(2,000,000)
Fixed maturity securities [Member] \| CMBS [Member]
OTTI Recognized in Net Income (Loss)
Gross OTTI recognized in net income (loss)	(16,000,000)	(15,000,000)	(36,000,000)	(39,000,000)
Fixed maturity securities [Member] \| RMBS [Member]
OTTI Recognized in Net Income (Loss)
Gross OTTI recognized in net income (loss)	(14,000,000)	(23,000,000)	(32,000,000)	(43,000,000)
Loan to value ratio less than sixty five [Member]
Mortgage Loans Credit Quality [Line Items]
Principal amount of mortgage loans on real estate	5,395,000,000		5,395,000,000		5,338,000,000
Percentage of total mortgage loans on real estate	79.10%		79.10%		76.70%
Debt-service coverage ratio	1.63		1.63		1.61
Loan to value ratio sixty five to seventy four [Member]
Mortgage Loans Credit Quality [Line Items]
Principal amount of mortgage loans on real estate	1,008,000,000		1,008,000,000		1,198,000,000
Percentage of total mortgage loans on real estate	14.80%		14.80%		17.20%
Debt-service coverage ratio	1.41		1.41		1.37
Loan to value ratio seventy five to one hundred [Member]
Mortgage Loans Credit Quality [Line Items]
Principal amount of mortgage loans on real estate	334,000,000		334,000,000		308,000,000
Percentage of total mortgage loans on real estate	4.90%		4.90%		4.40%
Debt-service coverage ratio	0.90		0.90		0.92
Loan to value ratio, greater than one hundred [Member]
Mortgage Loans Credit Quality [Line Items]
Principal amount of mortgage loans on real estate	82,000,000		82,000,000		116,000,000
Percentage of total mortgage loans on real estate	1.20%		1.20%		1.70%
Debt-service coverage ratio	0.32		0.32		0.36
Corporate bonds [Member]
Available For Sale Securities In Unrealized Loss Position With Loss Severity Greater Than 20 Percent [Line Items]
Balance as of beginning of year					51,000,000
Decreases attributable to:
Balance as of end of year	73,000,000		73,000,000		51,000,000
Other Than Temporary Impairments Credit Losses [Line Items]
Amortized Cost	239,000,000		239,000,000		169,000,000
Gross Unrealized Gains	1,000,000		1,000,000		1,000,000
Gross Unrealized Losses and OTTI	(104,000,000)		(104,000,000)		(67,000,000)
Fair Value	136,000,000		136,000,000		103,000,000
OTTI in Credit Losses	73,000,000		73,000,000		51,000,000
RMBS [Member]
Available For Sale Securities In Unrealized Loss Position With Loss Severity Greater Than 20 Percent [Line Items]
Balance as of beginning of year					301,000,000
Decreases attributable to:
Balance as of end of year	268,000,000		268,000,000		301,000,000
Other Than Temporary Impairments Credit Losses [Line Items]
Amortized Cost	697,000,000		697,000,000		690,000,000
Gross Unrealized Gains	5,000,000		5,000,000		1,000,000
Gross Unrealized Losses and OTTI	(91,000,000)		(91,000,000)		(128,000,000)
Fair Value	611,000,000		611,000,000		563,000,000
OTTI in Credit Losses	268,000,000		268,000,000		301,000,000
CMBS [Member]
Available For Sale Securities In Unrealized Loss Position With Loss Severity Greater Than 20 Percent [Line Items]
Balance as of beginning of year					38,000,000
Decreases attributable to:
Balance as of end of year	74,000,000		74,000,000		38,000,000
Other Than Temporary Impairments Credit Losses [Line Items]
Amortized Cost	46,000,000		46,000,000		17,000,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses and OTTI	(24,000,000)		(24,000,000)		(10,000,000)
Fair Value	22,000,000		22,000,000		7,000,000
OTTI in Credit Losses	74,000,000		74,000,000		38,000,000
Available For Sale Securities Continuous Unrealized Loss Position Less Than 6 Months [Member]
Available For Sale Securities In Unrealized Loss Position With Loss Severity Greater Than 20 Percent [Line Items]
Fair Value	115,000,000		115,000,000		385,000,000
Gross Unrealized Losses	41,000,000		41,000,000		125,000,000
Gross Unrealized OTTI	2,000,000		2,000,000		31,000,000
Number of securities	25		25		56
Available For Sale Securities Continuous Unrealized Loss Position More Than 6 Months And Less Than 9 Months [Member]
Available For Sale Securities In Unrealized Loss Position With Loss Severity Greater Than 20 Percent [Line Items]
Fair Value	13,000,000		13,000,000		53,000,000
Gross Unrealized Losses	4,000,000		4,000,000		30,000,000
Gross Unrealized OTTI	1,000,000		1,000,000		12,000,000
Number of securities	4		4		18
Available For Sale Securities Continuous Unrealized Loss Position Less Than 12 Months [Member]
Available For Sale Securities In Unrealized Loss Position With Loss Severity Greater Than 20 Percent [Line Items]
Fair Value	104,000,000		104,000,000		2,000,000
Gross Unrealized Losses	40,000,000		40,000,000		0
Gross Unrealized OTTI	12,000,000		12,000,000		1,000,000
Number of securities	17		17		7
Available For Sale Securities Continuous Unrealized Loss Position 12 Months Or Longer [Member]
Available For Sale Securities In Unrealized Loss Position With Loss Severity Greater Than 20 Percent [Line Items]
Fair Value	584,000,000		584,000,000		615,000,000
Gross Unrealized Losses	342,000,000		342,000,000		470,000,000
Gross Unrealized OTTI	165,000,000		165,000,000		111,000,000
Number of securities	167		167		175
Total Available For Sale Securities Backed By Pools Of Residential Mortgages At Risk [Member]
Schedule Of Available For Sale Securities Residential And Commercial Mortgage At Risk [Line Items]
Amortized Cost	1,734,000,000		1,734,000,000		2,023,000,000
Fair Value	1,363,000,000		1,363,000,000		1,553,000,000
Unrealized Loss	(371,000,000)		(371,000,000)		(470,000,000)
Total Available For Sale Securities Backed By Pools Of Commercial Mortgages At Risk [Member]
Schedule Of Available For Sale Securities Residential And Commercial Mortgage At Risk [Line Items]
Amortized Cost	355,000,000		355,000,000		472,000,000
Fair Value	274,000,000		274,000,000		344,000,000
Unrealized Loss	(81,000,000)		(81,000,000)		(128,000,000)
Total Available For Sale Securities Backed By Pools Of Residential And Commercial Mortgages At Risk [Member]
Schedule Of Available For Sale Securities Residential And Commercial Mortgage At Risk [Line Items]
Amortized Cost	2,089,000,000		2,089,000,000		2,495,000,000
Fair Value	1,637,000,000		1,637,000,000		1,897,000,000
Unrealized Loss	(452,000,000)		(452,000,000)		(598,000,000)
Available For Sale Securities Backed By Pools Of Residential Mortgages Subject To Detailed Analysis [Member]
Schedule Of Available For Sale Securities Residential And Commercial Mortgage At Risk [Line Items]
Amortized Cost	1,724,000,000		1,724,000,000		2,015,000,000
Fair Value	1,353,000,000		1,353,000,000		1,545,000,000
Unrealized Loss	(371,000,000)		(371,000,000)		(470,000,000)
Available For Sale Securities Backed By Pools Of Commercial Mortgages Subject To Detailed Analysis [Member]
Schedule Of Available For Sale Securities Residential And Commercial Mortgage At Risk [Line Items]
Amortized Cost	79,000,000		79,000,000		126,000,000
Fair Value	42,000,000		42,000,000		61,000,000
Unrealized Loss	(37,000,000)		(37,000,000)		(65,000,000)
Available For Sale Securities Backed By Pools Of Residential And Commercial Mortgages Subject To Detailed Analysis [Member]
Schedule Of Available For Sale Securities Residential And Commercial Mortgage At Risk [Line Items]
Amortized Cost	1,803,000,000		1,803,000,000		2,141,000,000
Fair Value	1,395,000,000		1,395,000,000		1,606,000,000
Unrealized Loss	(408,000,000)		(408,000,000)		(535,000,000)
Investment Type [Domain]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	72,212,000,000		72,212,000,000		69,796,000,000
Gross unrealized gains	8,689,000,000		8,689,000,000		7,585,000,000
Gross unrealized losses	(631,000,000)		(631,000,000)		(906,000,000)
Gross unrealized OTTI	(220,000,000)		(220,000,000)		(203,000,000)
Fair Value	80,050,000,000		80,050,000,000		76,272,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	3,160,000,000		3,160,000,000		3,993,000,000
Greater Than Twelve Months	2,272,000,000		2,272,000,000		2,490,000,000
Continuous Unrealized Loss Position, Total	5,432,000,000		5,432,000,000		6,483,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	295,000,000		295,000,000		338,000,000
Greater Than Twelve Months	556,000,000		556,000,000		771,000,000
Gross Unrealized Losses and OTTI, Total	851,000,000		851,000,000		1,109,000,000
Available For Sale Securities In Unrealized Loss Position Qualitative Disclosure Number Of Positions	734		734		897
MBS [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Subtotal - Amortized Cost	8,112,000,000		8,112,000,000
Available-for-sale Securities, Debt Maturities, Fair Value
Subtotal - Fair Value	8,504,000,000		8,504,000,000
CDOs [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Subtotal - Amortized Cost	135,000,000		135,000,000
Available-for-sale Securities, Debt Maturities, Fair Value
Subtotal - Fair Value	120,000,000		120,000,000
Fixed maturity securities [Member] \| Investment Type [Domain]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	72,069,000,000		72,069,000,000		69,661,000,000
Gross unrealized gains	8,670,000,000		8,670,000,000		7,569,000,000
Gross unrealized losses	(623,000,000)		(623,000,000)		(894,000,000)
Gross unrealized OTTI	(220,000,000)		(220,000,000)		(203,000,000)
Fair Value	79,896,000,000		79,896,000,000		76,133,000,000
Available-for-sale Securities, Debt Maturities, Amortized Cost
Due in one year or less	2,931,000,000		2,931,000,000
Due after one year through five years	12,188,000,000		12,188,000,000
Due after five years through ten years	23,651,000,000		23,651,000,000
Due after ten years	25,052,000,000		25,052,000,000
Subtotal - Amortized Cost	63,822,000,000		63,822,000,000
Available-for-sale Securities, Debt Maturities, Fair Value
Due in one year or less	2,989,000,000		2,989,000,000
Due after one year through five years	13,136,000,000		13,136,000,000
Due after five years through ten years	26,185,000,000		26,185,000,000
Due after ten years	28,962,000,000		28,962,000,000
Subtotal - Fair Value	71,272,000,000		71,272,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	3,150,000,000		3,150,000,000		3,955,000,000
Greater Than Twelve Months	2,268,000,000		2,268,000,000		2,490,000,000
Continuous Unrealized Loss Position, Total	5,418,000,000		5,418,000,000		6,445,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	294,000,000		294,000,000		326,000,000
Greater Than Twelve Months	549,000,000		549,000,000		771,000,000
Gross Unrealized Losses and OTTI, Total	843,000,000		843,000,000		1,097,000,000
Fixed maturity securities [Member] \| Corporate bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	57,342,000,000		57,342,000,000		53,661,000,000
Gross unrealized gains	7,068,000,000		7,068,000,000		6,185,000,000
Gross unrealized losses	(393,000,000)		(393,000,000)		(517,000,000)
Gross unrealized OTTI	(103,000,000)		(103,000,000)		(68,000,000)
Fair Value	63,914,000,000		63,914,000,000		59,261,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	2,389,000,000		2,389,000,000		2,848,000,000
Greater Than Twelve Months	1,293,000,000		1,293,000,000		1,452,000,000
Continuous Unrealized Loss Position, Total	3,682,000,000		3,682,000,000		4,300,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	175,000,000		175,000,000		162,000,000
Greater Than Twelve Months	321,000,000		321,000,000		423,000,000
Gross Unrealized Losses and OTTI, Total	496,000,000		496,000,000		585,000,000
Fixed maturity securities [Member] \| U.S. government bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	449,000,000		449,000,000		439,000,000
Gross unrealized gains	68,000,000		68,000,000		55,000,000
Gross unrealized losses	0		0		0
Gross unrealized OTTI	0		0		0
Fair Value	517,000,000		517,000,000		494,000,000
Fixed maturity securities [Member] \| Foreign government bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	583,000,000		583,000,000		668,000,000
Gross unrealized gains	81,000,000		81,000,000		65,000,000
Gross unrealized losses	0		0		0
Gross unrealized OTTI	0		0		0
Fair Value	664,000,000		664,000,000		733,000,000
Fixed maturity securities [Member] \| RMBS [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	6,808,000,000		6,808,000,000		7,690,000,000
Gross unrealized gains	522,000,000		522,000,000		548,000,000
Gross unrealized losses	(41,000,000)		(41,000,000)		(73,000,000)
Gross unrealized OTTI	(92,000,000)		(92,000,000)		(126,000,000)
Fair Value	7,197,000,000		7,197,000,000		8,039,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	521,000,000		521,000,000		565,000,000
Greater Than Twelve Months	314,000,000		314,000,000		429,000,000
Continuous Unrealized Loss Position, Total	835,000,000		835,000,000		994,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	90,000,000		90,000,000		125,000,000
Greater Than Twelve Months	43,000,000		43,000,000		74,000,000
Gross Unrealized Losses and OTTI, Total	133,000,000		133,000,000		199,000,000
Fixed maturity securities [Member] \| CMBS [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	1,304,000,000		1,304,000,000		1,642,000,000
Gross unrealized gains	71,000,000		71,000,000		73,000,000
Gross unrealized losses	(43,000,000)		(43,000,000)		(106,000,000)
Gross unrealized OTTI	(25,000,000)		(25,000,000)		(9,000,000)
Fair Value	1,307,000,000		1,307,000,000		1,600,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	110,000,000		110,000,000		178,000,000
Greater Than Twelve Months	146,000,000		146,000,000		146,000,000
Continuous Unrealized Loss Position, Total	256,000,000		256,000,000		324,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	25,000,000		25,000,000		15,000,000
Greater Than Twelve Months	43,000,000		43,000,000		100,000,000
Gross Unrealized Losses and OTTI, Total	68,000,000		68,000,000		115,000,000
Fixed maturity securities [Member] \| CDOs [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	135,000,000		135,000,000		121,000,000
Gross unrealized gains	0		0		0
Gross unrealized losses	(15,000,000)		(15,000,000)		(19,000,000)
Gross unrealized OTTI	0		0		0
Fair Value	120,000,000		120,000,000		102,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	0		0		9,000,000
Greater Than Twelve Months	68,000,000		68,000,000		80,000,000
Continuous Unrealized Loss Position, Total	68,000,000		68,000,000		89,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	0		0		1,000,000
Greater Than Twelve Months	15,000,000		15,000,000		18,000,000
Gross Unrealized Losses and OTTI, Total	15,000,000		15,000,000		19,000,000
Fixed maturity securities [Member] \| State and municipal bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	3,525,000,000		3,525,000,000		3,490,000,000
Gross unrealized gains	767,000,000		767,000,000		566,000,000
Gross unrealized losses	(8,000,000)		(8,000,000)		(9,000,000)
Gross unrealized OTTI	0		0		0
Fair Value	4,284,000,000		4,284,000,000		4,047,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	5,000,000		5,000,000		31,000,000
Greater Than Twelve Months	22,000,000		22,000,000		30,000,000
Continuous Unrealized Loss Position, Total	27,000,000		27,000,000		61,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	0		0		0
Greater Than Twelve Months	8,000,000		8,000,000		9,000,000
Gross Unrealized Losses and OTTI, Total	8,000,000		8,000,000		9,000,000
Fixed maturity securities [Member] \| Hybrid and redeemable preferred securities [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	1,248,000,000		1,248,000,000		1,277,000,000
Gross unrealized gains	63,000,000		63,000,000		50,000,000
Gross unrealized losses	(123,000,000)		(123,000,000)		(170,000,000)
Gross unrealized OTTI	0		0		0
Fair Value	1,188,000,000		1,188,000,000		1,157,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	125,000,000		125,000,000		324,000,000
Greater Than Twelve Months	425,000,000		425,000,000		353,000,000
Continuous Unrealized Loss Position, Total	550,000,000		550,000,000		677,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	4,000,000		4,000,000		23,000,000
Greater Than Twelve Months	119,000,000		119,000,000		147,000,000
Gross Unrealized Losses and OTTI, Total	123,000,000		123,000,000		170,000,000
Fixed maturity securities [Member] \| VIEs' fixed maturity securities
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	675,000,000		675,000,000		673,000,000
Gross unrealized gains	30,000,000		30,000,000		27,000,000
Gross unrealized losses	0		0		0
Gross unrealized OTTI	0		0		0
Fair Value	705,000,000		705,000,000		700,000,000
Equity securities [Member] \| Investment Type [Domain]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	143,000,000		143,000,000		135,000,000
Gross unrealized gains	19,000,000		19,000,000		16,000,000
Gross unrealized losses	(8,000,000)		(8,000,000)		(12,000,000)
Gross unrealized OTTI	0		0		0
Fair Value	154,000,000		154,000,000		139,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	10,000,000		10,000,000		38,000,000
Greater Than Twelve Months	4,000,000		4,000,000		0
Continuous Unrealized Loss Position, Total	14,000,000		14,000,000		38,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	1,000,000		1,000,000		12,000,000
Greater Than Twelve Months	7,000,000		7,000,000		0
Gross Unrealized Losses and OTTI, Total	$ 8,000,000		$ 8,000,000		$ 12,000,000

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Represents the amortization of deferred acquisition costs, value of business acquired, deferred sales inducements and deferred front-end loads associated with gross other-than-temporary impairment losses recognized in net income (loss).

+ References

No definition available.

+ Details

Name:	lnc_AmortizationAssociatedWithGrossOtherThanTemporaryImpairmentNetIncome
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the amortization of deferred acquisition costs, value of business acquired, deferred sales inducements and deferred front-end loads and changes in other contract holder funds and funds withheld reinsurance liabilities associated with realized gains and losses related to certain investments.

+ References

No definition available.

+ Details

Name:	lnc_AmortizationAssociatedWithRealizedGainLossOnCertainInvestments
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	lnc_AmortizedCostGrossUnrealizedGainsLossesOttiAndFairValueOfAfsSecuritiesAbstract
Namespace Prefix:	lnc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amortized cost of portfolio rated below investment grade.

+ References

No definition available.

+ Details

Name:	lnc_AmortizedCostOfPortfolioRatedBelowInvestmentGrade
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the change in gross unrealized holding gain or loss on available-for-sale securities that has been included in accumulated other comprehensive income, a separate component of shareholders' equity, during the period.

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesChangeInGrossUnrealizedHoldingGainLoss
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This item represents the total of all debt securities with single maturity dates grouped by maturity dates, at cost, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments, as defined), and fair value hedge accounting adjustments, if any, which are classified neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCost
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the total of all debt securities with single maturity dates grouped by maturity dates, at fair value, which are categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateFairValue
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the fair value of available-for-sale securities where the fair value had declined and remained below amortized cost by greater than 20 percent.

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesFairValueDeclinedGreaterThan20PercentFairValueDisclosure
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the gross unrealized losses of available-for-sale securities where the fair value had declined and remained below amortized cost by greater than 20 percent.

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesFairValueDeclinedGreaterThan20PercentGrossUnrealizedLoss
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of other-than-temporary impairment loss recognized in other comprehensive income for available-for-sale securities where the fair value had declined and remained below amortized cost by greater than 20 percent.

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesFairValueDeclinedGreaterThan20PercentOtherThanTemporaryImpairment
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item contains disclosure of the number of available-for-sale securities where the fair value had declined and remained below amortized cost by greater than 20 percent.

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesFairValueDeclinedGreaterThan20PercentQualitativeDisclosureNumberOfPositions
Namespace Prefix:	lnc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of the fair value of portfolio that was rated investment grade as of balance sheet date.

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesFairValueDisclosurePercentInvestmentGrade
Namespace Prefix:	lnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of gross other than temporary impairment loss on a debt security, categorized as Available-for-sale, related to factors other than credit losses when the entity does not intend to sell the security and it is not more likely than not that the entity will be required to sell the security before recovery of its amortized cost basis.

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesGrossOtherThanTemporaryImpairmentsRecognizedInOtherComprehensiveIncome
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This item represents the excess of [amortized] cost over fair value as of the reporting date of securities that have been in a loss position for twelve months or longer for those securities which are categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesInContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the excess of [amortized] cost over fair value as of the reporting date of securities in a loss position and which are categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesInContinuousUnrealizedLossPositionAggregateLosses
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the excess of [amortized] cost over fair value as of the reporting date of securities that have been in a loss position for less than twelve months for those securities which are categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesInContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item contains disclosure of the number of available-for-sale securities in an unrealized loss position.

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesInUnrealizedLossPositionQualitativeDisclosureNumberOfPositions
Namespace Prefix:	lnc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	lnc_AvailableForSaleSecuritiesInUnrealizedLossPositionWithLossSeverityGreaterThan20PercentLineItems
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Data Type:	xbrli:stringItemType
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- Definition

The amount of other than temporary impairment loss on a debt security, categorized as Available-for-sale, related to factors other than credit losses when the entity does not intend to sell the security and it is not more likely than not that the entity will be required to sell the security before recovery of its amortized cost basis. This amount is a portion of the deduction from the total impairment losses of investments (before taxes) presented on the income statement.

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesOtherThanTemporaryImpairment
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Recovery as a percentage of amortized cost for securities with other than temporary impairment recorded in net income (loss).

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesOtherThanTemporaryImpairmentRecoveryPercent
Namespace Prefix:	lnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This item represents the amortized cost of fixed maturity available-for-sale securities that had credit losses recognized in earnings for which a portion of an other than temporary impairment was recognized in other comprehensive income (a component of shareholders' equity).

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesWithCreditLossesRecognizedInEarningsAmortizedCost
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the fair value of fixed maturity available-for-sale securities that had credit losses recognized in earnings for which a portion of an other than temporary impairment was recognized in other comprehensive income (a component of shareholders' equity).

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesWithCreditLossesRecognizedInEarningsFairValueDisclosure
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the gross unrealized other-than-temporary impairment of fixed maturity available-for-sale securities that had credit losses recognized in earnings for which a portion of an other than temporary impairment was recognized in other comprehensive income (a component of shareholders' equity).

+ References

No definition available.

+ Details

Name:	lnc_AvailableForSaleSecuritiesWithCreditLossesRecognizedInEarningsGrossUnrealizedOtherThanTemporaryImpairment
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	lnc_CarryingValueOfPayablesForCollateralOnInvestmentsAbstract
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Data Type:	xbrli:stringItemType
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Period Type:	duration

- Definition

This line item represents the change in deferred acquisition costs, value of business acquired, deferred sales inducements and deferred front-end loads associated with gross other-than-temporary impairment losses recognized in other comprehensive income (loss).

+ References

No definition available.

+ Details

Name:	lnc_ChangeInRelatedItemsOnGrossOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncome
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This item represents the percentage of the fair value of AFS securities obtained as collateral pledged for Federal Home Loan Bank of Indianapolis (high end of range).

+ References

No definition available.

+ Details

Name:	lnc_CollateralObtainedPercentOfFairValueFhlbiHighEndOfRangeAfs
Namespace Prefix:	lnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This item represents the percentage of the fair value of Mortgage loans obtained as collateral pledged for Federal Home Loan Bank of Indianapolis (high end of range).

+ References

No definition available.

+ Details

Name:	lnc_Collateralobtainedpercentoffairvaluefhlbihighendofrangemortgageloan
Namespace Prefix:	lnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This item represents the percentage of the fair value of AFS Securities obtained as collateral pledged for Federal Home Loan Bank of Indianapolis (low end of range).

+ References

No definition available.

+ Details

Name:	lnc_CollateralObtainedPercentOfFairValueFhlbiLowEndOfRangeAfs
Namespace Prefix:	lnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This item represents the percentage of the fair value of Mortgage loans obtained as collateral pledged for Federal Home Loan Bank of Indianapolis (low end of range).

+ References

No definition available.

+ Details

Name:	lnc_CollateralObtainedPercentOfFairValuefhlbilowendofrangeMortgageloan
Namespace Prefix:	lnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This item represents the percentage of the fair value of securities obtained as collateral under reverse repurchase agreements

+ References

No definition available.

+ Details

Name:	lnc_CollateralObtainedPercentOfFairValueReverseRepurchaseAgreements
Namespace Prefix:	lnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This item represents the percentage of the fair value of domestic securities obtained as collateral under securities lending agreements

+ References

No definition available.

+ Details

Name:	lnc_CollateralObtainedPercentOfFairValueSecuritiesLendingAgreementsDomestic
Namespace Prefix:	lnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This item represents the percentage of the fair value of foreign securities obtained as collateral under securities lending agreements

+ References

No definition available.

+ Details

Name:	lnc_CollateralObtainedPercentOfFairValueSecuritiesLendingAgreementsForeign
Namespace Prefix:	lnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This item represents the average percentage of the fair value of Term Asset-Backed Securities Loan Facility securities obtained as collateral pledged for Term Asset-Backed Securities Loan Facility.

+ References

No definition available.

+ Details

Name:	lnc_CollateralObtainedPercentOfFairValueTalf
Namespace Prefix:	lnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of cash received as collateral from a counterparty.

+ References

No definition available.

+ Details

Name:	lnc_CollateralPayableHeldForDerivativeInvestmentsCarryingValue
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fair value of cash received as collateral from a counterparty.

+ References

No definition available.

+ Details

Name:	lnc_CollateralPayableHeldForDerivativeInvestmentsFairValue
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Ratio that compares a property's net operating income to its debt-service payments.

+ References

No definition available.

+ Details

Name:	lnc_DebtServiceCoverageRatio
Namespace Prefix:	lnc_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	lnc_DecreasesAttributableToAbstract
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

This item represents the gross realized gains on the sale of equity securities categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

Name:	lnc_EquityAvailableForSaleSecuritiesGrossRealizedGains
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	lnc_EvaluationOfCreditLossesLineItems
Namespace Prefix:	lnc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value of portfolio rated below investment grade.

+ References

No definition available.

+ Details

Name:	lnc_FairValueOfPortfolioRatedBelowInvestmentGrade
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	lnc_FairValueOfRelatedInvestmentsOrCollateralAbstract
Namespace Prefix:	lnc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

This item represents the gross realized gains on the sale of debt securities categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

Name:	lnc_FixedMaturityAvailableForSaleSecuritiesGrossRealizedGains
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This item represents the gross realized losses on the sale of debt securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments of the subject investments in debt securities.

+ References

No definition available.

+ Details

Name:	lnc_FixedMaturityAvailableForSaleSecuritiesGrossRealizedLosses
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Mortgage loans that are greater than 90 days past due.

+ References

No definition available.

+ Details

Name:	lnc_GreaterThanNinetyDaysPastDue
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of gross other than temporary impairment losses on investments in debt and equity securities categorized as Available-for-sale which have been recognized in net income during the period.

+ References

No definition available.

+ Details

Name:	lnc_GrossOttiRecognizedInNetIncomeLoss
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This item represents the gross unrealized gains of fixed maturity available-for-sale securities that had credit losses recognized in earnings for which a portion of an other than temporary impairment was recognized in other comprehensive income (a component of shareholders' equity).

+ References

No definition available.

+ Details

Name:	lnc_GrossUnrealizedGains
Namespace Prefix:	lnc_
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- Definition

This item represents the gross unrealized gains for available for sale securities. Such gross unrealized gains are the excess of the fair value of the Available-for-sale Securities over their carrying value as of the reporting date.

+ References

No definition available.

+ Details

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- Definition

This item represents the gross unrealized losses for available for sale securities. Such gross unrealized losses are the excess of the carrying value of the Available-for-sale Securities over their fair value as of the reporting date.

+ References

No definition available.

+ Details

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Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The net change during the reporting period in the amount of cash that is received related to collateral payable held for derivative instruments.

+ References

No definition available.

+ Details

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Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The net change during the reporting period in the amount of cash that is received related to securities pledged under securities lending agreements.

+ References

No definition available.

+ Details

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Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The net change during the reporting period in the amount of cash that is received related to securities pledged for Federal Home Loan Bank of Indianapolis.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The net change during the reporting period in the amount of cash that is received related to securities pledged for Term Asset-Backed Securities Loan Facility.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Balance Type:	na
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- Definition

This item represents total investment commitments as of the balance sheet date for fixed maturity available-for-sale securities, limited partnerships, real estate and mortgage loans on real estate.

+ References

No definition available.

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Data Type:	xbrli:monetaryItemType
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- Definition

This item represents investment commitments as of the balance sheet date for limited partnerships.

+ References

No definition available.

+ Details

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Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
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- Definition

This item represents investment commitments as of the balance sheet date for private placements.

+ References

No definition available.

+ Details

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Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
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- Definition

This item represents investment commitments as of the balance sheet date for mortgage loans.

+ References

No definition available.

+ Details

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Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Largest concentration percentage of mortgage loans on commercial real estate throughout the U.S.

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No definition available.

+ Details

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Namespace Prefix:	lnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

No authoritative reference available.

+ References

No definition available.

+ Details

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Balance Type:	debit
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- Definition

This item represents the cost of available-for-sale securities that are backed by pools of residential and/or commercial mortgages and that are in a gross unrealized loss position.

+ References

No definition available.

+ Details

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- Definition

This item represents the fair value of available-for-sale securities that are backed by pools of residential and/or commercial mortgages and that are in a gross unrealized loss position.

+ References

No definition available.

+ Details

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- Definition

This item represents the gross unrealized loss of available-for-sale securities that are backed by pools of residential and/or commercial mortgages and that are in a gross unrealized loss position.

+ References

No definition available.

+ Details

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- Details

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- Definition

Mortgage loans that are current.

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No definition available.

+ Details

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- Definition

The amount of other than temporary impairment losses on investments in debt and equity securities categorized as Available-for-sale which have been recognized in earnings during the period, pre-tax, after the associated amortization expense of DAC, VOBA, DSI and DFEL.

+ References

No definition available.

+ Details

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- Definition

Total number of impaired mortgage loans as of the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

Number of partnerships represented in alternative investment portfolio.

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No definition available.

+ Details

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- Definition

This item represents the net realized gain (loss) included in earnings for the period on other investments.

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No definition available.

+ Details

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- Definition

Total other-than-temporary impairment for available-for-sale securities backed by pools of residential and commercial mortgages recognized during the reporting period.

+ References

No definition available.

+ Details

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- Definition

Other-than-temporary impairment for available-for-sale securities backed by pools of residential and commercial mortgages relating to credit losses and recognized in net income (loss) during the reporting period.

+ References

No definition available.

+ Details

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- Definition

Other-than-temporary impairment for available-for-sale securities backed by pools of residential and commercial mortgages relating to factors other than credit losses and recognized in other comprehensive income during the reporting period.

+ References

No definition available.

+ Details

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- Definition

Reflects the percentage derived from dividing mortgage loans with a specified loan-to-value ratio by total principal amount of mortgage loans.

+ References

No definition available.

+ Details

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- Definition

Gross other than temporary impairment loss on a debt security, categorized as Available-for-sale, related to factors other than credit losses when the entity does not intend to sell the security and it is not more likely than not that the entity will be required to sell the security before recovery of its amortized cost. This amount is a portion of the deduction from the total impairment losses of Investments (before taxes) presented on the income statement after the change in DAC, VOBA, DSI and DFEL.

+ References

No definition available.

+ Details

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- Definition

This item represents the default rate (as a percentage) of the underlying assets in the security that was considered as one of the potential factors in reaching a conclusion that the available-for-sale investments are other than temporarily impaired and the amount of such impairment determined to be related to credit loss recognized in earnings (high end of range).

+ References

No definition available.

+ Details

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- Definition

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No definition available.

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- Details

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- Definition

The amount of cash received as security in return for loaning securities to Federal Home Loan Bank of Indianapolis.

+ References

No definition available.

+ Details

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- Definition

The fair value of investments loaned to Federal Home Loan Bank of Indianapolis as of the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

The amount of cash received as security in return for loaning securities under the Term Asset-Backed Securities Loan Facility.

+ References

No definition available.

+ Details

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- Definition

The fair value of investments loaned under the Term Asset-Backed Securities Loan Facility as of the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

The amount of cash received as security in return for loaning securities to another party under reverse repurchase agreements.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

The fair value of investments loaned to another party under reverse repurchase agreements as of the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

The amount of cash received as security in return for loaning securities to another party under securities lending agreements.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

The fair value of investments loaned to another party under securities lending agreements as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	lnc_
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- Definition

This item represents the loss severity as a percentage of first lien loans that was considered as one of the potential factors in reaching a conclusion that the available-for-sale investments are other than temporarily impaired and the amount of such impairment determined to be related to credit loss recognized in earnings.

+ References

No definition available.

+ Details

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- Definition

This item represents the loss severity as a percentage of defaulted second lien loans that was considered as one of the potential factors in reaching a conclusion that the available-for-sale investments are other than temporarily impaired and the amount of such impairment determined to be related to credit loss recognized in earnings.

+ References

No definition available.

+ Details

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- Definition

Mortgage loans that are less than 90 days past due but more than 60 days past due.

+ References

No definition available.

+ Details

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- Definition

The total fair value of investments related to payables for collateral on investments as of the balance sheet date.

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Definition

This item represents the net realized gain (loss) included in earnings for the period related to certain investments.

+ References

No definition available.

+ Details

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- Definition

The amount of premium (net of discount) that was originally recognized at the issuance of the mortgage loan that has yet to be amortized.

+ References

No definition available.

+ Details

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Balance Type:	debit
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- Definition

The reserve to cover probable credit losses related to specifically identified fixed maturity real estate loans as well as probable credit losses inherent in the remainder of that loan portfolio.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 60

-Paragraph 47

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

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-Topic 944

-SubTopic 310

-Section 45

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6873192&loc=d3e21338-158488

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- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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-Name FASB Staff Position (FSP)

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-Paragraph 7

-Footnote 2

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-Paragraph 1

-Subparagraph (SX 210.5-02.2)

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This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

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-Publisher FASB

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This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months.

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This item represents debt securities, at cost, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments, as defined), and fair value hedge accounting adjustments, if any, which are expected to mature after five years and through ten years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.

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This item represents the fair value of debt securities which are expected to mature after five years and through ten years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Section 50

-Paragraph 8

-SubTopic 10

-Topic 320

-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27340-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 18B

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 18B

-Subparagraph g

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Balance Type:	debit
Period Type:	instant

- Definition

This item represents reductions in the cumulative amount of credit losses recognized in earnings for an other than temporary impairment (OTTI) of a debt security because of the sale of impaired securities during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 18B

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Section 50

-Paragraph 8

-Subparagraph (c)

-SubTopic 10

-Topic 320

-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27340-111563

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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