XML 135 R78.htm IDEA: XBRL DOCUMENT v3.10.0.1

Fair Value Measurements - Fair Value Option (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value Inputs and Valuation Techniques
Fixed maturities, at fair value using the fair value option	$ 22	$ 41
Corporate
Fair Value Inputs and Valuation Techniques
Changes in fair value of assets using fair value option		(1)
Equity Securities [Member]
Fair Value Inputs and Valuation Techniques
Changes in fair value of assets using fair value option		$ 1
Real Estate Investment [Member]
Fair Value Inputs and Valuation Techniques
Changes in fair value of assets using fair value option	$ (1)		$ 5
Foreign government
Fair Value Inputs and Valuation Techniques
Changes in fair value of assets using fair value option			$ (1)

X

- Definition

Fair Value, Option, Fixed Maturity Securities

+ References

No definition available.

+ Details

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

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612

+ Details

Name:	us-gaap_FairValueOptionChangesInFairValueGainLoss1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	invest_InvestmentSectorAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSectorAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSectorAxis=us-gaap_RealEstateInvestmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSectorAxis=us-gaap_ForeignGovernmentDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: