Schedule III Supplementary Insurance Information Level 4 (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Schedule of Supplementary Insurance Information [Abstract]
Supplementary Insurance Information, Deferred Policy Acquisition Costs	$ 1,823		$ 2,161
Future Policy Benefits, Unpaid Losses and Loss Adjustment Expenses	41,444		41,373
Unearned Premiums	5,255		5,225
Other Policyholder Funds and Benefits Payable	32,532		58,763
Earned Premiums, Fee Income and Other	15,444		15,611		17,462
Net Investment Income (Loss)	3,154		3,264		4,127
Benefits, Losses and Loss Adjustment Expenses	10,805		11,048		13,195
Amortization of Deferred Policy Acquisition Costs and Present Value of Future Profits	1,729		1,794		1,990
Net Written Premiums	10,244	[1]	9,929	[1]	9,847	[1]
Insurance Operating Costs and Other Expenses	4,381	[2]	6,360	[2]	6,990	[2]
Property & Casualty Commercial [Member]
Schedule of Supplementary Insurance Information [Abstract]
Supplementary Insurance Information, Deferred Policy Acquisition Costs	421		404
Future Policy Benefits, Unpaid Losses and Loss Adjustment Expenses	16,505		16,293
Unearned Premiums	3,184		3,188
Other Policyholder Funds and Benefits Payable	0		0
Earned Premiums, Fee Income and Other	6,402		6,315		6,361
Net Investment Income (Loss)	958		984		924
Benefits, Losses and Loss Adjustment Expenses	3,855		4,085		4,575
Amortization of Deferred Policy Acquisition Costs and Present Value of Future Profits	919		905		927
Net Written Premiums	6,381	[1]	6,208	[1]	6,209	[1]
Insurance Operating Costs and Other Expenses	1,194	[2]	1,190	[2]	1,139	[2]
Property and Casualty, Personal Insurance Product Line [Member]
Schedule of Supplementary Insurance Information [Abstract]
Supplementary Insurance Information, Deferred Policy Acquisition Costs	155		145
Future Policy Benefits, Unpaid Losses and Loss Adjustment Expenses	1,874		1,864
Unearned Premiums	1,914		1,858
Other Policyholder Funds and Benefits Payable	0		0
Earned Premiums, Fee Income and Other	3,806		3,823		3,791
Net Investment Income (Loss)	129		145		159
Benefits, Losses and Loss Adjustment Expenses	2,684		2,580		2,630
Amortization of Deferred Policy Acquisition Costs and Present Value of Future Profits	348		332		332
Net Written Premiums	3,861	[1]	3,719	[1]	3,630	[1]
Insurance Operating Costs and Other Expenses	599	[2]	761	[2]	769	[2]
Property & Casualty Other Operations [Member]
Schedule of Supplementary Insurance Information [Abstract]
Supplementary Insurance Information, Deferred Policy Acquisition Costs	0		0
Future Policy Benefits, Unpaid Losses and Loss Adjustment Expenses	3,427		3,548
Unearned Premiums	1		1
Other Policyholder Funds and Benefits Payable	0		0
Earned Premiums, Fee Income and Other	1		0		(2)
Net Investment Income (Loss)	129		141		149
Benefits, Losses and Loss Adjustment Expenses	261		148		65
Amortization of Deferred Policy Acquisition Costs and Present Value of Future Profits	0		0		0
Net Written Premiums	2	[1]	2	[1]	8	[1]
Insurance Operating Costs and Other Expenses	31	[2]	27	[2]	28	[2]
Group Benefits [Member]
Schedule of Supplementary Insurance Information [Abstract]
Supplementary Insurance Information, Deferred Policy Acquisition Costs	36		41
Future Policy Benefits, Unpaid Losses and Loss Adjustment Expenses	6,540		6,547
Unearned Premiums	45		65
Other Policyholder Funds and Benefits Payable	518		188
Earned Premiums, Fee Income and Other	3,095		3,330		3,810
Net Investment Income (Loss)	374		390		405
Benefits, Losses and Loss Adjustment Expenses	2,362		2,518		3,029
Amortization of Deferred Policy Acquisition Costs and Present Value of Future Profits	32		33		33
Net Written Premiums	0	[1]	0	[1]	0	[1]
Insurance Operating Costs and Other Expenses	836	[2]	964	[2]	1,033	[2]
Mutual Funds [Member]
Schedule of Supplementary Insurance Information [Abstract]
Supplementary Insurance Information, Deferred Policy Acquisition Costs	11		19
Future Policy Benefits, Unpaid Losses and Loss Adjustment Expenses	0		0
Unearned Premiums	0		0
Other Policyholder Funds and Benefits Payable	0		0
Earned Premiums, Fee Income and Other	723		668		626
Net Investment Income (Loss)	0		0		(3)
Benefits, Losses and Loss Adjustment Expenses	0		0		0
Amortization of Deferred Policy Acquisition Costs and Present Value of Future Profits	28		39		35
Net Written Premiums	0	[1]	0	[1]	0	[1]
Insurance Operating Costs and Other Expenses	559	[2]	511	[2]	479	[2]
Talcott Resolution [Member]
Schedule of Supplementary Insurance Information [Abstract]
Supplementary Insurance Information, Deferred Policy Acquisition Costs	1,200		1,552
Future Policy Benefits, Unpaid Losses and Loss Adjustment Expenses	13,098		13,122
Unearned Premiums	111		112
Other Policyholder Funds and Benefits Payable	32,014		58,571
Earned Premiums, Fee Income and Other	1,407		1,463		2,708
Net Investment Income (Loss)	1,542		1,577		2,462
Benefits, Losses and Loss Adjustment Expenses	1,643		1,717		2,896
Amortization of Deferred Policy Acquisition Costs and Present Value of Future Profits	402		485		663
Net Written Premiums	0	[1]	0	[1]	0	[1]
Insurance Operating Costs and Other Expenses	544	[2]	2,150	[2]	1,692	[2]
Corporate [Member]
Schedule of Supplementary Insurance Information [Abstract]
Supplementary Insurance Information, Deferred Policy Acquisition Costs	0		0
Future Policy Benefits, Unpaid Losses and Loss Adjustment Expenses	0		(1)
Unearned Premiums	0		1
Other Policyholder Funds and Benefits Payable	0		4
Earned Premiums, Fee Income and Other	10		12		168
Net Investment Income (Loss)	22		27		31
Benefits, Losses and Loss Adjustment Expenses	0		0		0
Amortization of Deferred Policy Acquisition Costs and Present Value of Future Profits	0		0		0
Net Written Premiums	0	[1]	0	[1]	0	[1]
Insurance Operating Costs and Other Expenses	$ 618	[2]	$ 757	[2]	$ 1,850	[2]

[1] Excludes life insurance pursuant to Regulation S-X.[4]For the years ended, December 31, 2013 and 2012, Talcott Resolution was recast to reflect the impact of the sale of HLIKK. For further information regarding this transaction, see Note 2 - Business Dispositions of Notes to Consolidated Financial Statements.

[2] Includes interest expense, goodwill impairment, loss on extinguishment of debt, and reinsurance loss on disposition.