XML 60 R106.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Reserve for Unpaid Losses and Loss Adjustment Expenses - Additional Information (Details) - USD ($) | 3 Months Ended | 7 Months Ended | 12 Months Ended | 36 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2019 | Jun. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2019
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Current accident year benefit from discounting property and casualty reserves |  |  |  | $ 33,000,000 | $ 12,000,000 | $ 15,000,000 |  |
Salvage and Subrogation Recoveries, Value | $ 57,000,000 |  | $ 57,000,000 | 57,000,000 |  |  |  | $ 57,000,000
Prepaid Reinsurance Premiums | 57,000,000 |  | 57,000,000 | 57,000,000 |  |  |  | 57,000,000
Liability for Future Policy Benefit, Adverse Development, Expense | 238,000,000 |  |  |  |  | 285,000,000 |  |
Reinsurance Recoverable, Guarantee Benefit |  |  |  |  | 238,000,000 | 285,000,000 |  |
Change in Deferred Gain on Retroactive Reinsurance | 16,000,000 |  | 16,000,000 | 16,000,000 | 0 | 0 |  | 16,000,000
Adverse Development Cover Navigators Group [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Payments for Reinsurance |  | $ 91,000,000 | 91,000,000 |  |  |  |  |
Reinsurance Retention Policy, Amount Retained |  | 68,000,000 |  |  |  |  |  |
Policyholder Benefits and Claims Incurred, Ceded |  | $ 91,000,000 |  | 107,000,000 |  |  |  |
Change in Deferred Gain on Retroactive Reinsurance | 16,000,000 |  | 16,000,000 | 16,000,000 |  |  |  | 16,000,000
Retention Layer Above Reserve for the Covered Liabilities as of the Inception Date [Member] | Adverse Development Cover Navigators Group [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Reinsurance Retention Policy, Amount Retained |  |  |  | 100,000,000 |  |  |  |
Policyholder Benefits and Claims Incurred, Ceded |  |  |  | 207,000,000 |  |  |  |
Retention Layer for Reserve for the Covered Liabilities as of the Inception Date [Member] | Adverse Development Cover Navigators Group [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Reinsurance Retention Policy, Amount Retained |  |  |  | 1,816,000,000 |  |  |  |
Property and Casualty Insurance Products |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Net | 22,986,000,000 |  | 22,986,000,000 | 22,986,000,000 | 20,352,000,000 | 19,818,000,000 | $ 19,057,000,000 | 22,986,000,000
Reinsurance and Other Recoverables | 5,275,000,000 |  | 5,275,000,000 | 5,275,000,000 | 4,232,000,000 | 3,957,000,000 | 3,488,000,000 | 5,275,000,000
Group Benefits |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Net | 8,009,000,000 |  | 8,009,000,000 | 8,009,000,000 | 8,206,000,000 | 8,303,000,000 | 5,564,000,000 | 8,009,000,000
Prior accident year development [1] |  |  |  | (410,000,000) | (324,000,000) | (185,000,000) |  |
Reinsurance and Other Recoverables | 247,000,000 |  | 247,000,000 | $ 247,000,000 | 239,000,000 | $ 209,000,000 | 208,000,000 | 247,000,000
Scenario, Adjustment [Member] | Property and Casualty Insurance Products |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Reinsurance and Other Recoverables |  |  |  |  | $ 90,000,000 |  |  |
Minimum | Group Benefits |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Range of discount rates |  |  |  | 2.10% | 2.10% | 2.10% |  |
Maximum | Adverse Development Cover Navigators Group [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Reinsurance Retention Policy, Excess Retention, Amount Reinsured |  |  |  | $ 300,000,000 |  |  |  |
Maximum | Group Benefits |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Range of discount rates |  |  |  | 8.00% | 8.00% | 8.00% |  |
Camp Wildfire [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments | 12,000,000 |  | 12,000,000 | $ 12,000,000 |  |  |  | 12,000,000
Policyholder Benefits and Claims Incurred, Assumed |  |  |  | 350,000,000 |  |  |  |
Group long-term disability | Group Benefits |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Net | 6,616,000,000 |  | 6,616,000,000 | 6,616,000,000 |  |  |  | 6,616,000,000
Prior accident year development [1] |  |  |  | 340,000,000 | $ 230,000,000 | $ 125,000,000 |  |
Reinsurance and Other Recoverables | 236,000,000 |  | 236,000,000 | 236,000,000 |  |  |  | 236,000,000
Group life and accident, excluding premium waiver | Group Benefits |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Net | 580,000,000 |  | 580,000,000 | 580,000,000 |  |  |  | 580,000,000
Prior accident year development [1] |  |  |  | 60,000,000 | 90,000,000 | 60,000,000 |  |
Reinsurance and Other Recoverables | 1,000,000 |  | 1,000,000 | 1,000,000 |  |  |  | 1,000,000
Property and Casualty Insurance Products |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Net | 22,986,000,000 |  | 22,986,000,000 | 22,986,000,000 |  |  |  | 22,986,000,000
Prior accident year development [1] |  |  |  | (65,000,000) | (167,000,000) | (41,000,000) |  |
Reinsurance and Other Recoverables | 5,275,000,000 |  | 5,275,000,000 | 5,275,000,000 |  |  |  | 5,275,000,000
Policyholder Benefits and Claims Incurred, Ceded |  |  |  | $ 826,000,000 | $ 661,000,000 | $ 901,000,000 |  |
Property and Casualty Insurance Products | Minimum |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Range of discount rates |  |  |  | 1.76% | 1.77% | 1.77% |  |
Property and Casualty Insurance Products | Maximum |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Range of discount rates |  |  |  | 14.03% | 14.15% | 14.15% |  |
Catastrophes |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Net | 825,000,000 |  | 825,000,000 | $ 825,000,000 |  |  |  | 825,000,000
Prior accident year development [1] |  |  |  | (42,000,000) | $ (49,000,000) | $ (16,000,000) |  |
Catastrophes | Scenario, Adjustment [Member] | Property and Casualty Insurance Products |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Net |  |  |  |  | 850,000,000 |  |  |
Prior accident year development [1] |  |  |  |  | 133,000,000 |  |  |
Catastrophes | Scenario, Plan [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments | 45,000,000 |  | 45,000,000 | 45,000,000 |  |  |  | 45,000,000
Asbestos and Environmental |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Net | 1,147,000,000 |  | 1,147,000,000 | 1,147,000,000 |  |  |  | 1,147,000,000
Reinsurance and Other Recoverables | 1,219,000,000 |  | 1,219,000,000 | 1,219,000,000 |  |  |  | 1,219,000,000
Payments for Reinsurance |  |  |  |  |  | 650,000,000 |  |
Reinsurance Retention Policy, Excess Retention, Amount Reinsured |  |  |  | 860,000,000 |  |  |  |
Reinsurance Retention Policy, Amount Retained |  |  |  |  |  |  | $ 1,700,000,000 |
Policyholder Benefits and Claims Incurred, Ceded |  |  |  | 640,000,000 |  |  |  | 640,000,000
Asbestos and Environmental | Maximum |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Reinsurance Retention Policy, Excess Retention, Amount Reinsured |  |  |  | 1,500,000,000 |  |  |  |
General liability |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Net | 3,494,000,000 |  | 3,494,000,000 | 3,494,000,000 |  |  |  | 3,494,000,000
Prior accident year development [1] |  |  |  | 61,000,000 | 52,000,000 | 11,000,000 |  |
Reinsurance and Other Recoverables | 630,000,000 |  | 630,000,000 | 630,000,000 |  |  |  | 630,000,000
General liability | Adverse Development Cover Navigators Group [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Policyholder Benefits and Claims Incurred, Ceded |  |  |  | 28,000,000 |  |  |  |
Professional liability |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Net | 1,050,000,000 |  | 1,050,000,000 | 1,050,000,000 |  |  |  | 1,050,000,000
Prior accident year development [1] |  |  |  | 29,000,000 | (12,000,000) | 1,000,000 |  |
Reinsurance and Other Recoverables | 549,000,000 |  | 549,000,000 | 549,000,000 |  |  |  | 549,000,000
Professional liability | Adverse Development Cover Navigators Group [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Policyholder Benefits and Claims Incurred, Ceded |  |  |  | 25,000,000 |  |  |  |
Assumed Reinsurance [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Net | 190,000,000 |  | 190,000,000 | 190,000,000 |  |  |  | 190,000,000
Prior accident year development [1] |  |  |  | 3,000,000 | 0 | 0 |  |
Reinsurance and Other Recoverables | 25,000,000 |  | 25,000,000 | 25,000,000 |  |  |  | 25,000,000
Assumed Reinsurance [Member] | Adverse Development Cover Navigators Group [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Policyholder Benefits and Claims Incurred, Ceded |  |  |  | 13,000,000 |  |  |  |
Commercial Auto Physical Damage [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Net | 15,000,000 |  | 15,000,000 | 15,000,000 |  |  |  | 15,000,000
Reinsurance and Other Recoverables | (1,000,000) |  | (1,000,000) | (1,000,000) |  |  |  | (1,000,000)
Commercial Auto Physical Damage [Member] | Adverse Development Cover Navigators Group [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Policyholder Benefits and Claims Incurred, Ceded |  |  |  | 12,000,000 |  |  |  |
Marine [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Net | 279,000,000 |  | 279,000,000 | 279,000,000 |  |  |  | 279,000,000
Prior accident year development [1] |  |  |  | 8,000,000 | 0 | 0 |  |
Reinsurance and Other Recoverables | 135,000,000 |  | 135,000,000 | 135,000,000 |  |  |  | 135,000,000
Marine [Member] | Adverse Development Cover Navigators Group [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Policyholder Benefits and Claims Incurred, Ceded |  |  |  | 9,000,000 |  |  |  |
Property |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Prior accident year development [1] |  |  |  | 3,000,000 | (25,000,000) | (14,000,000) |  |
Property | Property and Casualty, Commercial Insurance [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Net | 461,000,000 |  | 461,000,000 | 461,000,000 |  |  |  | 461,000,000
Prior accident year development [1] |  |  |  | (11,000,000) | $ (12,000,000) | $ (8,000,000) |  |
Reinsurance and Other Recoverables | 162,000,000 |  | 162,000,000 | 162,000,000 |  |  |  | 162,000,000
Property | Property and Casualty, Commercial Insurance [Member] | Adverse Development Cover Navigators Group [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Policyholder Benefits and Claims Incurred, Ceded |  |  |  | 8,000,000 |  |  |  |
Short-Duration Insurance, Other [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Net | 215,000,000 |  | 215,000,000 | 215,000,000 |  |  |  | 215,000,000
Reinsurance and Other Recoverables | 312,000,000 |  | 312,000,000 | 312,000,000 |  |  |  | 312,000,000
Short-Duration Insurance, Other [Member] | Adverse Development Cover Navigators Group [Member] |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Policyholder Benefits and Claims Incurred, Ceded |  |  |  | 12,000,000 |  |  |  |
PG&E [Member] | Portion of Expected Class Settlement Due to HIG [Member] | Minimum |  |  |  |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |  |  |  |
Gain Contingency, Unrecorded Amount | 300,000,000 |  | 300,000,000 | 300,000,000 |  |  |  | 300,000,000
PG&E [Member] | Portion of Expected Class Settlement Due to HIG [Member] | Maximum |  |  |  |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |  |  |  |
Gain Contingency, Unrecorded Amount | $ 325,000,000 |  | $ 325,000,000 | $ 325,000,000 |  |  |  | $ 325,000,000

X
- Definition Change in Deferred Gain on Retroactive Reinsurance + References No definition available. + Details
Name: | hig_ChangeinDeferredGainonRetroactiveReinsurance
Namespace Prefix: | hig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Current accident year benefit from discounting property and casualty reserves. + References No definition available. + Details
Name: | hig_CurrentAccidentYearBenefitFromDiscountingPropertyAndCasualtyReserves
Namespace Prefix: | hig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Range of Discount Rates + References No definition available. + Details
Name: | hig_RangeofDiscountRates
Namespace Prefix: | hig_
Data Type: | num:percentItemType
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_GainContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount or range of possible amounts of gain that could be realized upon the resolution of a contingency. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6397426&loc=d3e17499-108355 + Details
Name: | us-gaap_GainContingencyUnrecordedAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of expense for adverse development on liability of future policy benefit from net premium exceeding gross premium. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 6 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=117419472&loc=d3e14931-158439 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 65 -Paragraph 2 -Subparagraph (g)(2)(ii) -URI http://asc.fasb.org/extlink&oid=117419843&loc=SL117420844-207641 + Details
Name: | us-gaap_LiabilityForFuturePolicyBenefitAdverseDevelopmentExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Liability as of the balance sheet date for amounts representing estimated cost of settling unpaid claims under the terms of the underlying insurance policies, less estimated reinsurance recoveries on such claims. This includes an estimate for claims which have been incurred but not reported. Claim adjustment expenses represent the costs estimated to be incurred in the settlement of unpaid claims. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(13)(a)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (cc) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
Name: | us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cash payments made for reinsurance during the current period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585 + Details
Name: | us-gaap_PaymentsForReinsurance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The unexpired portion of premiums ceded on policies in force as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 340 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6485982&loc=d3e22818-158507 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 825 -Section 50 -Paragraph 1B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=99380617&loc=SL75241803-196195 + Details
Name: | us-gaap_PrepaidReinsurancePremiums
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of policy benefits and costs incurred for policies assumed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=99397103&loc=d3e6811-158387 + Details
Name: | us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of reduction of provision for policy benefits and costs incurred for policies ceded. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=99397103&loc=d3e6811-158387 + Details
Name: | us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, after valuation allowance, recoverable under reinsurance contracts for losses reported to the ceding insurer but not yet paid and amounts expected for incurred losses and settlement expenses, which have not yet been reported to the ceding insurer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 310 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=99404803&loc=d3e21412-158489 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=99397103&loc=d3e6824-158387 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (cc) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
Name: | us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Sum of the amount of guaranteed minimum benefits the ceding insurer expects to recover on insurance policies ceded to other insurance entities as of the balance sheet date for all guaranteed benefit types. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 80 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=117420044&loc=d3e19393-158473 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=117418410&loc=d3e7104-158389 + Details
Name: | us-gaap_ReinsuranceRecoverableGuaranteeBenefits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, after valuation allowance, recoverable under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, policy benefits and policy reserves. Excludes premiums paid under reinsurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 310 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=99404803&loc=d3e21412-158489 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 310 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=99404803&loc=d3e21409-158489 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=99397103&loc=d3e6824-158387 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 825 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99380617&loc=SL75241803-196195 + Details
Name: | us-gaap_ReinsuranceRecoverablesOnPaidAndUnpaidLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Stated amount that is the upper retention limit per entity policy. + References No definition available. + Details
Name: | us-gaap_ReinsuranceRetentionPolicyAmountRetained
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of risk reinsured in excess of stated retention per company policy. + References No definition available. + Details
Name: | us-gaap_ReinsuranceRetentionPolicyExcessRetentionAmountReinsured
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The estimated amount as of the balance sheet date to be received by an insurer from the sale of property (usually damaged) on which the insurer has paid a total claim to the insured and has obtained title to the property and the right of an insurer to pursue any course of recovery of damages, in its name or in the name of the policyholder, against a third party who is liable for costs relating to an insured event that have been paid by the insurer. Estimated salvage and subrogation is generally deducted from the liability for unpaid claims. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 30 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6482241&loc=d3e13783-158432 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 30 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6482241&loc=d3e13779-158432 + Details
Name: | us-gaap_SalvageAndSubrogationRecoveriesValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred in prior reporting periods and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
Name: | us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_ReinsurancePolicyTypeAxis=hig_AdverseDevelopmentCoverNavigatorsGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | hig_CededReinsuranceRetentionLayerAxis=hig_RetentionLayerAboveReservefortheCoveredLiabilitiesasoftheInceptionDateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | hig_CededReinsuranceRetentionLayerAxis=hig_RetentionLayerforReservefortheCoveredLiabilitiesasoftheInceptionDateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_PropertyLiabilityAndCasualtyInsuranceSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_GroupPoliciesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=us-gaap_ScenarioAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=hig_CampWildfireMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=hig_LongtermDisabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=hig_GrouplifetermdisabilityandaccidentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_PropertyLiabilityAndCasualtyInsuranceSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=hig_CatastrophesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=us-gaap_ScenarioPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=hig_AsbestosandEnvironmentalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_GeneralLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_ProfessionalLiabilityInsuranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=hig_AssumedReinsuranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=hig_CommercialAutoPhysicalDamageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=hig_MarineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_PropertyInsuranceProductLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_PropertyAndCasualtyCommercialInsuranceProductLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_OtherShortdurationInsuranceProductLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=hig_PGEMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_GainContingenciesByNatureAxis=hig_PortionofExpectedClassSettlementDuetoHIGMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |