XML 118 R61.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Business Acquisitions - Intangible Assets Recorded in Connection with the Acquisition (Details) - Aetna Group Insurance [Member] $ in Millions | Nov. 01, 2017 USD ($)
--- | ---
Business Acquisition [Line Items] |
Finite-lived Intangible Assets Acquired | $ 629
Value of in-force contracts |
Business Acquisition [Line Items] |
Finite-lived Intangible Assets Acquired | $ 23
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 1 year
Customer relationships [1] |
Business Acquisition [Line Items] |
Finite-lived Intangible Assets Acquired | $ 590
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 15 years
Marketing agreement with Aetna |
Business Acquisition [Line Items] |
Finite-lived Intangible Assets Acquired | $ 16
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 15 years
Software and Software Development Costs [Member] |
Business Acquisition [Line Items] |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 5 years
Intangible Assets Arising from Insurance Contracts Acquired in Business Combination [Member] |
Business Acquisition [Line Items] |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 12 years

X
- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
Name: | us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
Name: | us-gaap_FinitelivedIntangibleAssetsAcquired1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=hig_AetnaGroupInsuranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_ContractualRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=hig_MarketingAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_ComputerSoftwareIntangibleAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_IntangibleAssetsArisingFromInsuranceContractsAcquiredInBusinessCombinationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |