Business Dispositions Level 4 (Details) (USD $)	3 Months Ended								12 Months Ended			6 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	Jun. 30, 2014	Jan. 02, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reinsurance Recoverables	$ 22,920,000,000				$ 23,330,000,000				$ 22,920,000,000	$ 23,330,000,000
Property, Plant and Equipment, Net	831,000,000				877,000,000				831,000,000	877,000,000
Other Assets	1,236,000,000				2,998,000,000				1,236,000,000	2,998,000,000
Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense	41,444,000,000				41,373,000,000				41,444,000,000	41,373,000,000
Asset Impairment Charges									42,000,000	20,000,000	5,000,000
Separate Accounts, Liability	134,702,000,000				140,886,000,000				134,702,000,000	140,886,000,000
Disposal Group, Assets of Business Transferred under Contractual Arrangement	1,000,000,000				1,300,000,000				1,000,000,000	1,300,000,000
Revenues	4,617,000,000	4,769,000,000	4,616,000,000	4,612,000,000	4,777,000,000	4,862,000,000	4,734,000,000	6,300,000,000	18,614,000,000	20,673,000,000	22,086,000,000
Disposal Group, Including Discontinued Operation, Operating Income (Loss)									69,000,000	(1,468,000,000)	(444,000,000)
Net Income (Loss) Attributable to Parent	382,000,000	388,000,000	(467,000,000)	495,000,000	314,000,000	293,000,000	(190,000,000)	(241,000,000)	798,000,000	176,000,000	(38,000,000)
Other Policyholder Funds	32,532,000,000				39,029,000,000				32,532,000,000	39,029,000,000
Short-term debt	456,000,000				438,000,000				456,000,000	438,000,000
Other Liabilities	6,251,000,000				6,188,000,000				6,251,000,000	6,188,000,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax									622,000,000	102,000,000	1,000,000
Liabilities	226,293,000,000				258,979,000,000				226,293,000,000	258,979,000,000
Available-for-sale Securities, Equity Securities	1,047,000,000				868,000,000				1,047,000,000	868,000,000
Available-for-sale Securities, Debt Securities	59,384,000,000				62,357,000,000				59,384,000,000	62,357,000,000
Mortgage Loans on Real Estate, Commercial and Consumer, Net	5,556,000,000				5,598,000,000				5,556,000,000	5,598,000,000
Loans, Gross, Insurance Policy	1,431,000,000				1,420,000,000				1,431,000,000	1,420,000,000
Retirement Plans and Individual Life Businesses [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Available for sale securities, Fair Value													15,349,000,000
Reinsurance loss on disposition, including goodwill impairment										71	110
International Annuity [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Other Policyholder Funds	0				19,734,000,000				0	19,734,000,000
Hartford Life International Limited [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale of Business, Cash Consideration Received on Transaction					285,000,000					285,000,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax										(102,000,000)
Retirement Plans [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Fees and Commissions										355,000,000
Reinsurance Recoverables	8,600,000,000				9,500,000,000				8,600,000,000	9,500,000,000
Reinsurance loss on disposition, including goodwill impairment										24,000,000
Policyholder Funds													9,200,000,000
Separate Accounts, Liability													26,300,000,000
Disposal Group, Including Discontinued Operation, Other Assets													200,000,000
Revenues											706,000,000
Disposal Group, Including Discontinued Operation, Operating Income (Loss)											(39,000,000)
Retirement Plans [Member] | Mass Mutual [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Assets of Business Transferred under Contractual Arrangement													9,300,000,000
Individual Life [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Fees and Commissions										615,000,000
Reinsurance Recoverables	10,400,000,000				9,900,000,000				10,400,000,000	9,900,000,000
Reinsurance loss on disposition, including goodwill impairment										0	533,000,000
Premium Deficiency											191,000,000
Policyholder Funds					8,700,000,000					8,700,000,000
Separate Accounts, Liability					5,300,000,000					5,300,000,000
Disposal Group, Including Discontinued Operation, Other Assets													1,800,000,000
Disposal Group, Including Discontinued Operation, Other Liabilities					1,500,000,000					1,500,000,000
Loss Contingency, Loss in Period										191,000,000
Revenues											1,400,000,000
Disposal Group, Including Discontinued Operation, Operating Income (Loss)											(172,000,000)
Individual Life [Member] | Prudential [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Assets of Business Transferred under Contractual Arrangement													8,000,000,000
Assets supporting the modified coinsurance agreement, not transferred to prudential													1,400,000,000
Retirement [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Assets of Business Transferred under Contractual Arrangement													17,348,000,000
Available-for-sale Securities, Equity Securities													37,000,000
Available-for-sale Securities, Debt Securities													16,000,000
Mortgage Loans on Real Estate, Commercial and Consumer, Net													1,364,000,000
Loans, Gross, Insurance Policy													582,000,000
Reinsurance Loss on Dispositions [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reinsurance loss on disposition, including goodwill impairment									23,000,000	(1,574,000,000)	(533,000,000)
Reinsurance Loss on Dispositions [Member] | Retirement Plans [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reinsurance loss on disposition, including goodwill impairment										634,000,000
Reinsurance Loss on Dispositions [Member] | Individual Life [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reinsurance loss on disposition, including goodwill impairment										940,000,000
Gain (Loss) on Investments [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reinsurance loss on disposition, including goodwill impairment									0	1,575,000,000	0
Gain (Loss) on Investments [Member] | Retirement Plans [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reinsurance loss on disposition, including goodwill impairment										634,000,000
Gain (Loss) on Investments [Member] | Individual Life [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reinsurance loss on disposition, including goodwill impairment										940,000,000
Hartford Life Insurance K.K. [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale of Business, Cash Consideration Received on Transaction			963,000,000									963,000,000
Investments and Cash			18,733,000,000									18,733,000,000
Reinsurance Recoverables			46,000,000									46,000,000
Property, Plant and Equipment, Net			18,000,000									18,000,000
Other Assets			988,000,000									988,000,000
Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense			320,000,000									320,000,000
Other Policyholder Funds			2,265,000,000									2,265,000,000
Short-term debt			247,000,000									247,000,000
Other Liabilities			102,000,000									102,000,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax												659,000,000
Hartford Life Insurance K.K. [Member] | International Annuity [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Other Policyholder Funds			16,465,000,000									16,465,000,000
Fair Value, Inputs, Level 2 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Available-for-sale Securities, Equity Securities	163,000,000				337,000,000				163,000,000	337,000,000
Available-for-sale Securities, Debt Securities	55,803,000,000				56,892,000,000				55,803,000,000	56,892,000,000
Fair Value, Inputs, Level 2 [Member] | Retirement Plans and Individual Life Businesses [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Available for sale securities, Fair Value													14,700,000,000
Fair Value, Inputs, Level 3 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Available-for-sale Securities, Equity Securities	98,000,000				77,000,000				98,000,000	77,000,000
Available-for-sale Securities, Debt Securities	3,475,000,000				4,154,000,000				3,475,000,000	4,154,000,000
Fair Value, Inputs, Level 3 [Member] | Retirement Plans and Individual Life Businesses [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Available for sale securities, Fair Value													670,000,000
Investment Contracts [Member] | Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Liabilities					0					0
Investment Contracts [Member] | Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | JAPAN | Hartford Life Insurance K.K. [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Liabilities	763,000,000								763,000,000
Goodwill [Member] | Individual Life [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset Impairment Charges											$ 342,000,000