Fair Value of Assets and Liabilities (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Assets
Fixed income securities	$ 60,295	$ 77,017
Equity securities	4,812	4,037
Short-term Investments	2,694	2,336
Free-standing derivatives, assets	6		2
Separate account assets	4,928	6,610
Other liabilities:
Free-standing derivatives, liabilities	(16)		(32)
Liabilities held for sale	14,908
LBL
Assets
Assets held for sale	15,577
Other liabilities:
Liabilities held for sale	(14,908)
U.S. government and agencies
Assets
Fixed income securities	2,881	4,713
Municipal
Assets
Fixed income securities	9,611	13,069
Corporate
Assets
Fixed income securities	39,697	48,537
Foreign government
Assets
Fixed income securities	1,939	2,517
Asset-backed securities ("ABS")
Assets
Fixed income securities	3,421	3,624
Residential mortgage-backed securities ("RMBS")
Assets
Fixed income securities	1,844	3,032
Commercial mortgage-backed securities ("CMBS")
Assets
Fixed income securities	875	1,498
Redeemable preferred stock
Assets
Fixed income securities	27	27
Quoted prices in active markets for identical assets (Level 1)
Assets
Total assets at fair value	12,958	13,116
Assets as a percent of assets measured at fair value	15.20%	14.60%
Other liabilities:
Total liabilities at fair value	(1)
Significant other observable inputs (Level 2)
Assets
Total assets at fair value	69,983	74,008
Assets as a percent of assets measured at fair value	82.10%	82.10%
Other liabilities:
Free-standing derivatives, liabilities		(98)
Total liabilities at fair value	(152)	(98)
Liabilities as a percent of liabilities measured at fair value	1.30%	15.10%
Significant unobservable inputs (Level 3)
Assets
Total assets at fair value	2,288	3,081
Assets as a percent of assets measured at fair value	2.70%	3.40%
Contract holder funds:
Derivatives embedded in life and annuity contracts		(553)
Other liabilities:
Free-standing derivatives, liabilities		(30)
Total liabilities at fair value	(11,830)	(583)
Liabilities as a percent of liabilities measured at fair value	98.80%	90.00%
Counterparty and cash collateral netting
Assets
Total assets at fair value	(26)	(57)
Assets as a percent of assets measured at fair value		(0.10%)
Other liabilities:
Free-standing derivatives, liabilities		33
Total liabilities at fair value	14	33
Liabilities as a percent of liabilities measured at fair value	(0.10%)	(5.10%)
Fair Value
Assets
Total assets at fair value	85,203	90,148
Assets as a percent of assets measured at fair value	100.00%	100.00%
Mortgage loans	27	4
Limited partnership interests	26	4
Other investments	3	1
Contract holder funds:
Derivatives embedded in life and annuity contracts		(553)
Other liabilities:
Free-standing derivatives, liabilities		(95)
Total liabilities at fair value	(11,969)	(648)
Liabilities as a percent of liabilities measured at fair value	100.00%	100.00%
Recurring | LBL
Assets
Assets held for sale	12,200
Other liabilities:
Liabilities held for sale	(249)
Recurring | Quoted prices in active markets for identical assets (Level 1)
Assets
Fixed income securities	1,662	2,790
Equity securities	4,000	3,008
Short-term Investments	671	703
Separate account assets	4,928	6,610
Other assets		5
Assets held for sale	1,697
Total assets at fair value	12,958	13,116
Other liabilities:
Free-standing derivatives, liabilities	(1)
Total liabilities at fair value	(1)
Recurring | Quoted prices in active markets for identical assets (Level 1) | U.S. government and agencies
Assets
Fixed income securities	1,662	2,790
Recurring | Significant other observable inputs (Level 2)
Assets
Fixed income securities	56,901	71,330
Equity securities	684	858
Short-term Investments	2,023	1,633
Free-standing derivatives, assets	237	187
Assets held for sale	10,138
Total assets at fair value	69,983	74,008
Other liabilities:
Free-standing derivatives, liabilities	(152)
Total liabilities at fair value	(152)
Recurring | Significant other observable inputs (Level 2) | U.S. government and agencies
Assets
Fixed income securities	1,212	1,915
Recurring | Significant other observable inputs (Level 2) | Municipal
Assets
Fixed income securities	9,188	12,104
Recurring | Significant other observable inputs (Level 2) | Corporate
Assets
Fixed income securities	38,575	46,920
Recurring | Significant other observable inputs (Level 2) | Foreign government
Assets
Fixed income securities	1,939	2,517
Recurring | Significant other observable inputs (Level 2) | Asset-backed securities ("ABS")
Assets
Fixed income securities	3,281	3,373
Recurring | Significant other observable inputs (Level 2) | Residential mortgage-backed securities ("RMBS")
Assets
Fixed income securities	1,842	3,029
Recurring | Significant other observable inputs (Level 2) | Commercial mortgage-backed securities ("CMBS")
Assets
Fixed income securities	838	1,446
Recurring | Significant other observable inputs (Level 2) | Redeemable preferred stock
Assets
Fixed income securities	26	26
Recurring | Significant unobservable inputs (Level 3)
Assets
Fixed income securities	1,732	2,897
Equity securities	128	171
Free-standing derivatives, assets	6	3
Other assets	1	1
Assets held for sale	365
Total assets at fair value	2,232	3,072
Contract holder funds:
Derivatives embedded in life and annuity contracts	(283)
Other liabilities:
Free-standing derivatives, liabilities	(16)
Liabilities held for sale	(249)
Total liabilities at fair value	(548)
Recurring | Significant unobservable inputs (Level 3) | U.S. government and agencies
Assets
Fixed income securities	7	8
Recurring | Significant unobservable inputs (Level 3) | Municipal
Assets
Fixed income securities	423	965
Recurring | Significant unobservable inputs (Level 3) | Corporate
Assets
Fixed income securities	1,122	1,617
Recurring | Significant unobservable inputs (Level 3) | Asset-backed securities ("ABS")
Assets
Fixed income securities	140	251
Recurring | Significant unobservable inputs (Level 3) | Residential mortgage-backed securities ("RMBS")
Assets
Fixed income securities	2	3
Recurring | Significant unobservable inputs (Level 3) | Commercial mortgage-backed securities ("CMBS")
Assets
Fixed income securities	37	52
Recurring | Significant unobservable inputs (Level 3) | Redeemable preferred stock
Assets
Fixed income securities	1	1
Recurring | Counterparty and cash collateral netting
Assets
Free-standing derivatives, assets	(26)	(57)
Total assets at fair value	(26)	(57)
Other liabilities:
Free-standing derivatives, liabilities	14
Total liabilities at fair value	14
Recurring | Fair Value
Assets
Fixed income securities	60,295	77,017
Equity securities	4,812	4,037
Short-term Investments	2,694	2,336
Free-standing derivatives, assets	217	133
Separate account assets	4,928	6,610
Other assets	1	6
Assets held for sale	12,200
Total assets at fair value	85,147	90,139
Contract holder funds:
Derivatives embedded in life and annuity contracts	(283)
Other liabilities:
Free-standing derivatives, liabilities	(155)
Liabilities held for sale	(249)
Total liabilities at fair value	(687)
Recurring | Fair Value | U.S. government and agencies
Assets
Fixed income securities	2,881	4,713
Recurring | Fair Value | Municipal
Assets
Fixed income securities	9,611	13,069
Recurring | Fair Value | Corporate
Assets
Fixed income securities	39,697	48,537
Recurring | Fair Value | Foreign government
Assets
Fixed income securities	1,939	2,517
Recurring | Fair Value | Asset-backed securities ("ABS")
Assets
Fixed income securities	3,421	3,624
Recurring | Fair Value | Residential mortgage-backed securities ("RMBS")
Assets
Fixed income securities	1,844	3,032
Recurring | Fair Value | Commercial mortgage-backed securities ("CMBS")
Assets
Fixed income securities	875	1,498
Recurring | Fair Value | Redeemable preferred stock
Assets
Fixed income securities	27	27
Non-recurring | Significant unobservable inputs (Level 3)
Assets
Total assets at fair value	56	9
Other liabilities:
Total liabilities at fair value	(11,282)
Non-recurring | Fair Value
Assets
Total assets at fair value	56	9
Other liabilities:
Total liabilities at fair value	$ (11,282)