Label	Element	Value
UNITED STATES \| Variable Annuity [Member]
Gain (Loss) on Hedging Activity	us-gaap_GainLossOnOilAndGasHedgingActivity	$ 2
Gain (Loss) on Hedging Activity	us-gaap_GainLossOnOilAndGasHedgingActivity	(11)
UNITED STATES \| GMWB Derivatives, Net [Member]
Gain (Loss) on Hedging Activity	us-gaap_GainLossOnOilAndGasHedgingActivity	15
Gain (Loss) on Hedging Activity	us-gaap_GainLossOnOilAndGasHedgingActivity	(35)
UNITED STATES \| Macro Hedge Program [Member]
Gain (Loss) on Hedging Activity	us-gaap_GainLossOnOilAndGasHedgingActivity	(13)
Gain (Loss) on Hedging Activity	us-gaap_GainLossOnOilAndGasHedgingActivity	24
Commodity Option [Member]
Derivative, Cost of Hedge	us-gaap_DerivativeCostOfHedge	$ 11
Derivative, Price Risk Option Strike Price	us-gaap_DerivativePriceRiskOptionStrikePrice	35
Put Option [Member]
Maximum Aggregate Principal Amount of Junior Subordinated Notes	hig_MaximumAggregatePrincipalAmountOfJuniorSubordinatedNotes	$ 500
Foreign Exchange Option [Member] \| Macro Hedge Program [Member] \| JAPAN
Derivative, Notional Amount	invest_DerivativeNotionalAmount	400
Derivative, Notional Amount	invest_DerivativeNotionalAmount	0
Derivative, Fair Value, Net	us-gaap_DerivativeFairValueOfDerivativeNet	0
Derivative, Fair Value, Net	us-gaap_DerivativeFairValueOfDerivativeNet	0
Equity Option [Member] \| Macro Hedge Program [Member] \| UNITED STATES
Derivative, Notional Amount	invest_DerivativeNotionalAmount	5,983
Derivative, Notional Amount	invest_DerivativeNotionalAmount	4,272
Derivative, Fair Value, Net	us-gaap_DerivativeFairValueOfDerivativeNet	141
Derivative, Fair Value, Net	us-gaap_DerivativeFairValueOfDerivativeNet	183
GMWB Hedging Instruments [Member] \| Other Contract [Member] \| UNITED STATES
Derivative, Notional Amount	invest_DerivativeNotionalAmount	7,041
Derivative, Notional Amount	invest_DerivativeNotionalAmount	5,851
Derivative, Fair Value, Net	us-gaap_DerivativeFairValueOfDerivativeNet	124
Derivative, Fair Value, Net	us-gaap_DerivativeFairValueOfDerivativeNet	$ 155

Maximum aggregate principal amount of junior subordinated notes.

No definition available.

Name:	hig_MaximumAggregatePrincipalAmountOfJuniorSubordinatedNotes
Namespace Prefix:	hig_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

The premium (cost) of a hedge, expensed during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeCostOfHedge
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13495-108611

+ Details

Name:	us-gaap_DerivativeFairValueOfDerivativeNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The strike price on the price risk option contract such as a put option or a call option.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativePriceRiskOptionStrikePrice
Namespace Prefix:	us-gaap_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	instant

- Definition

Gain (loss) incurred in hedging activities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5618551-113959

+ Details

Name:	us-gaap_GainLossOnOilAndGasHedgingActivity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	invest_InvestmentGeographicRegionAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	hig_ResultsOfVariableAnnuityHedgeProgramByDerivativeInstrumentRiskAxis=us-gaap_VariableAnnuityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	hig_ResultsOfVariableAnnuityHedgeProgramByDerivativeInstrumentRiskAxis=hig_GmwbDerivativesNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	hig_ResultsOfVariableAnnuityHedgeProgramByDerivativeInstrumentRiskAxis=hig_MacroHedgeProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeByNatureAxis=us-gaap_CommodityOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeByNatureAxis=us-gaap_PutOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeByNatureAxis=hig_MacroHedgeProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	invest_InvestmentGeographicRegionAxis=country_JP
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_StockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=hig_GmwbHedgingInstrumentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeByNatureAxis=us-gaap_OtherContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: