Disclosure informationOther than Temporary Impairment, Credit Losses Recognized in Earnings, by Debt Security Category and Debt Security [Roll Forward]


Label:	Other than Temporary Impairment, Credit Losses Recognized in Earnings, by Debt Security Category and Debt Security [Roll Forward]
Name:	OtherThanTemporaryImpairmentCreditLossesRecognizedInEarnings
Parent Topic:	DebtAndEquitySecurities
Documentation:	Disclosure of the amount of other than temporary impairment (OTTI) related to credit losses recognized in earnings.
Commentary:
Level:	Detail
Information model:	[Roll Forward]
Completion state:	WIP
Status:
Exemplar Viewer:	OtherThanTemporaryImpairmentCreditLossesRecognizedInEarnings
US GAAP XBRL Taxonomy Text Block:	us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsTableTextBlock
US GAAP XBRL Taxonomy Network:	http://fasb.org/us-gaap/role/disclosure/InvestmentsDebtAndEquitySecurities \| Machine-readable \| Human-readable

Item	Description	Reference
1	FASB: Topic:320 Subtopic:10 Section:50 Paragraph:8	http://asc.fasb.org/extlink&oid=73527792&loc=d3e27340-111563

Entity Name and Text Block or Detailed Disclosure
ALLSTATE CORP TextBlock \| AMERICAN INTERNATIONAL GROUP INC TextBlock \| BANK OF AMERICA CORP /DE/ TextBlock \| FEDERAL HOME LOAN MORTGAGE CORP TextBlock \| JPMORGAN CHASE & CO TextBlock \| METLIFE INC TextBlock \| TRAVELERS COMPANIES, INC. TextBlock \| WELLS FARGO & COMPANY/MN TextBlock \|

Prototype of Disclosure (Representation structure): Machine Readable

Line	Label	Object Class (Data type)	Period Type	Balance	Report Element Name
1	Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table]	Table			us-gaap:ScheduleOfOtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsTable
2	Legal Entity [Axis]	Axis			dei:LegalEntityAxis
3	Consolidated Entity [Domain]	Member			dei:EntityDomain
4	Category of Debt Security [Axis]	Axis			us-gaap:InformationByCategoryOfDebtSecurityAxis
5	Other than Temporary Impairment, Credit Losses Recognized in Earnings, All Categories of Investments [Domain]	Member			us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCategoriesOfInvestmentsDomain
6	Available-for-sale Securities [Member]	Member			us-gaap:AvailableforsaleSecuritiesMember
7	Held-to-maturity Securities [Member]	Member			us-gaap:HeldtomaturitySecuritiesMember
8	Debt Security [Axis]	Axis			us-gaap:DebtSecurityAxis
9	Major Types of Debt Securities [Domain]	Member			us-gaap:MajorTypesOfDebtSecuritiesDomain
10	Debt Securities [Member]	Member			us-gaap:DebtSecuritiesMember
11	US Treasury and Government [Member]	Member			us-gaap:USTreasuryAndGovernmentMember
12	US Treasury Securities [Member]	Member			us-gaap:USTreasurySecuritiesMember
13	US Government Agencies Debt Securities [Member]	Member			us-gaap:USGovernmentAgenciesDebtSecuritiesMember
14	US Government-sponsored Enterprises Debt Securities [Member]	Member			us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember
15	US States and Political Subdivisions Debt Securities [Member]	Member			us-gaap:USStatesAndPoliticalSubdivisionsMember
16	Foreign Government Debt Securities [Member]	Member			us-gaap:ForeignGovernmentDebtSecuritiesMember
17	Corporate Debt Securities [Member]	Member			us-gaap:CorporateDebtSecuritiesMember
18	Domestic Corporate Debt Securities [Member]	Member			us-gaap:DomesticCorporateDebtSecuritiesMember
19	Foreign Corporate Debt Securities [Member]	Member			us-gaap:ForeignCorporateDebtSecuritiesMember
20	Commercial Paper, Not Included with Cash and Cash Equivalents [Member]	Member			us-gaap:CommercialPaperNotIncludedWithCashAndCashEquivalentsMember
21	Convertible Debt Securities [Member]	Member			us-gaap:ConvertibleDebtSecuritiesMember
22	Asset-backed Securities [Member]	Member			us-gaap:AssetBackedSecuritiesMember
23	Collateralized Mortgage Backed Securities [Member]	Member			us-gaap:MortgageBackedSecuritiesMember
24	Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]	Member			us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
25	Mortgage-backed Securities, Issued by Private Enterprises [Member]	Member			us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
26	Residential Mortgage Backed Securities [Member]	Member			us-gaap:ResidentialMortgageBackedSecuritiesMember
27	Commercial Mortgage Backed Securities [Member]	Member			us-gaap:CommercialMortgageBackedSecuritiesMember
28	Collateralized Debt Obligations [Member]	Member			us-gaap:CollateralizedDebtObligationsMember
29	Asset-backed Securities, Securitized Loans and Receivables [Member]	Member			us-gaap:AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember
30	Interest-Only-Strip [Member]	Member			us-gaap:InterestOnlyStripMember
31	Principal-Only-Strip [Member]	Member			us-gaap:PrincipalOnlyStripMember
32	Fixed Income Securities [Member]	Member			us-gaap:FixedIncomeSecuritiesMember
33	Auction Rate Securities [Member]	Member			us-gaap:AuctionRateSecuritiesMember
34	Variable Rate Demand Obligation [Member]	Member			us-gaap:VariableRateDemandObligationMember
35	Other Debt Obligations [Member]	Member			us-gaap:OtherDebtSecuritiesMember
36	Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	LineItems			us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsLineItems
37	Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]	Concept (Text/String)	For Period		us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsRollForward
38	Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Beginning Balance	Concept (Monetary)	As Of	Debit	us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld
39	Other than Temporary Impairment, Credit Losses Recognized in Earnings, Period Increase (Decrease) [Roll Up]	Concept (Text/String)	For Period		added:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsPeriodIncreaseDecreaseRollUp
40	Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment	Concept (Monetary)	For Period	Debit	us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment
41	Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold	Concept (Monetary)	For Period	Credit	us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold
42	Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status	Concept (Monetary)	For Period	Credit	us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsChangeInStatus
43	Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses	Concept (Monetary)	For Period	Debit	us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses
44	Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Cash Flows	Concept (Monetary)	For Period	Credit	us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows
45	Other than Temporary Impairment, Credit Losses Recognized in Earnings, Period Increase (Decrease), Total	Concept (Monetary)	For Period		us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsPeriodIncreaseDecrease
46	Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Ending Balance	Concept (Monetary)	As Of	Debit	us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld

From	Arcrole (predicate)	To
disclosures:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarnings	rules-arcroles:disclosure-isSECType	fro:DisclosureType
disclosures:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarnings	rules-arcroles:disclosure-equivalentTextblock	us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsTableTextBlock
disclosures:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarnings	rules-arcroles:disclosure-hasConceptArrangementPattern	fro:RollForward
disclosures:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarnings	rules-arcroles:disclosure-requiresConcept	us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld