Label	Element	Value
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held	us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	$ 552
UNITED STATES \| Variable Annuity [Member]
Gain (Loss) on Hedging Activity	us-gaap_GainLossOnOilAndGasHedgingActivity	(16)
Gain (Loss) on Hedging Activity	us-gaap_GainLossOnOilAndGasHedgingActivity	(30)
UNITED STATES \| GMWB Derivatives, Net [Member]
Gain (Loss) on Hedging Activity	us-gaap_GainLossOnOilAndGasHedgingActivity	(3)
Gain (Loss) on Hedging Activity	us-gaap_GainLossOnOilAndGasHedgingActivity	9
UNITED STATES \| Macro Hedge Program [Member]
Gain (Loss) on Hedging Activity	us-gaap_GainLossOnOilAndGasHedgingActivity	(25)
Gain (Loss) on Hedging Activity	us-gaap_GainLossOnOilAndGasHedgingActivity	(27)
Additional Paid-in Capital [Member]
Additional Paid in Capital	us-gaap_AdditionalPaidInCapital	8,983
Additional Paid in Capital	us-gaap_AdditionalPaidInCapital	$ 9,230
Commodity Option [Member]
Derivative, Price Risk Option Strike Price	us-gaap_DerivativePriceRiskOptionStrikePrice	35
Derivative, Cost of Hedge	us-gaap_DerivativeCostOfHedge	$ 11
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	0
Derivative, Notional Amount	invest_DerivativeNotionalAmount	400
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	4,591
Derivative, Notional Amount	invest_DerivativeNotionalAmount	5,983
Derivative, Fair Value, Net	us-gaap_DerivativeFairValueOfDerivativeNet	141
Derivative, Fair Value, Net	us-gaap_DerivativeFairValueOfDerivativeNet	165
GMWB Hedging Instruments [Member] \| Other Contract [Member] \| UNITED STATES
Derivative, Notional Amount	invest_DerivativeNotionalAmount	6,493
Derivative, Notional Amount	invest_DerivativeNotionalAmount	7,041
Derivative, Fair Value, Net	us-gaap_DerivativeFairValueOfDerivativeNet	116
Derivative, Fair Value, Net	us-gaap_DerivativeFairValueOfDerivativeNet	$ 124

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

Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.30(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 31

-Article 5

+ Details

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

- Definition

The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27340-111563

+ Details

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

- 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_StatementEquityComponentsAxis=us-gaap_AdditionalPaidInCapitalMember
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: