| | | | | | | | | | | | | | | | | | | | | |
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| <hasScenarios> false </hasScenarios> |
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| </Cells> |
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| | | <IsEPS> false </IsEPS> |
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| </Cells> |
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| | | <ElementPrefix> bac </ElementPrefix> |
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| | | <ShortDefinition> Represents the severity of the impairment of non-agency residential mortgage backed securities. </ShortDefinition> |
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| <CurrencyCode/> |
| <CurrencySymbol/> |
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| | | <ElementDefenition> Represents the severity of the impairment of non-agency residential mortgage backed securities. </ElementDefenition> |
| | | <ElementReferences> No authoritative reference available. </ElementReferences> |
| | | <IsTotalLabel> false </IsTotalLabel> |
| | | <IsEPS> false </IsEPS> |
| | | <Label> Loss severity </Label> |
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| | | <ShortDefinition> Represents the life default rate on mortgage backed securities. This is a significant assumption used in the valuation of... </ShortDefinition> |
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| <Cell> |
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| <DisplayZeroAsNone> false </DisplayZeroAsNone> |
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| </Cells> |
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| | | <ElementDefenition> Represents the life default rate on mortgage backed securities. This is a significant assumption used in the valuation of non-agency residential mortgage backed securities. </ElementDefenition> |
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| | | <IsEPS> false </IsEPS> |
| | | <Label> Life default rate </Label> |
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| <CurrencySymbol/> |
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| </Cells> |
| | | <OriginalInstanceReportColumns> |
| <Columns> |
| <Id> 3 </Id> |
| <IsAbstractGroupTitle> false </IsAbstractGroupTitle> |
| <LabelColumn> false </LabelColumn> |
| <CurrencyCode/> |
| <FootnoteIndexer/> |
| <hasSegments> true </hasSegments> |
| <hasScenarios> false </hasScenarios> |
| <MCU> |
| <KeyName> {us-gaap_StatementScenarioAxis} : Weighted average [Member] 12/31/2010 </KeyName> |
| <CurrencySymbol/> |
| <contextRef> |
| <ContextID> BalanceAsOf_31Dec2010_Weighted_Average_Member </ContextID> |
| <EntitySchema> http://www.sec.gov/CIK </EntitySchema> |
| <EntityValue> 0000070858 </EntityValue> |
| <PeriodDisplayName/> |
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| <anyType xsi:type="Segment"> |
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| <Name/> |
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| <Namespace> xbrldi </Namespace> |
| <Schema> http://xbrl.org/2006/xbrldi </Schema> |
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| <type> explicitMember </type> |
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| | | <IsAbstractGroupTitle> true </IsAbstractGroupTitle> |
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| | | <ElementName> bac_ValuationOfNonAgencyResidentialMBSAbstract </ElementName> |
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| | | <IsBaseElement> false </IsBaseElement> |
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| | | <PeriodType> duration </PeriodType> |
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| <CurrencySymbol/> |
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| </Cells> |
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| | | <IsEPS> false </IsEPS> |
| | | <Label> Significant assumptions used in the valuation of non-agency residential MBS </Label> |
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| | <Row> |
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| | | <IsAbstractGroupTitle> false </IsAbstractGroupTitle> |
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| | | <ElementPrefix> bac </ElementPrefix> |
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| | | <BalanceType> na </BalanceType> |
| | | <PeriodType> instant </PeriodType> |
| | | <ShortDefinition> Represents the annual constant prepayment speed. This is a significant assumption used in the valuation of non-agency... </ShortDefinition> |
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| <NonNumericTextHeader/> |
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| <hasScenarios> false </hasScenarios> |
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| </Cells> |
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| | <Row> |
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| | | <ElementPrefix> bac </ElementPrefix> |
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| | | <BalanceType> na </BalanceType> |
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| | | <ShortDefinition> Represents the severity of the impairment of non-agency residential mortgage backed securities. </ShortDefinition> |
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| </Cells> |
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| | | <ElementReferences> No authoritative reference available. </ElementReferences> |
| | | <IsTotalLabel> false </IsTotalLabel> |
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| | | <Label> Loss severity </Label> |
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| | <Row> |
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| | | <ElementPrefix> bac </ElementPrefix> |
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| | | <ShortDefinition> Represents the life default rate on mortgage backed securities. This is a significant assumption used in the valuation of... </ShortDefinition> |
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| <CurrencyCode/> |
| <CurrencySymbol/> |
| <IsIndependantCurrency> false </IsIndependantCurrency> |
| <ShowCurrencySymbol> false </ShowCurrencySymbol> |
| <DisplayDateInUSFormat> false </DisplayDateInUSFormat> |
| <hasSegments> false </hasSegments> |
| <hasScenarios> false </hasScenarios> |
| </Cell> |
| </Cells> |
| | | <OriginalInstanceReportColumns/> |
| | | <Unit> Other </Unit> |
| | | <ElementDataType> xbrli:pureItemType </ElementDataType> |
| | | <SimpleDataType> pure </SimpleDataType> |
| | | <ElementDefenition> Represents the life default rate on mortgage backed securities. This is a significant assumption used in the valuation of non-agency residential mortgage backed securities. </ElementDefenition> |
| | | <ElementReferences> No authoritative reference available. </ElementReferences> |
| | | <IsTotalLabel> false </IsTotalLabel> |
| | | <IsEPS> false </IsEPS> |
| | | <Label> Life default rate </Label> |
| | | </Row> |
| | </Rows> |
| <Footnotes/> |
| <NumberOfCols> 1 </NumberOfCols> |
| <NumberOfRows> 15 </NumberOfRows> |
| <ReportName> Securities (Details 4) </ReportName> |
| <MonetaryRoundingLevel> UnKnown </MonetaryRoundingLevel> |
| <SharesRoundingLevel> UnKnown </SharesRoundingLevel> |
| <PerShareRoundingLevel> UnKnown </PerShareRoundingLevel> |
| <ExchangeRateRoundingLevel> UnKnown </ExchangeRateRoundingLevel> |
| <HasCustomUnits> true </HasCustomUnits> |
| <SharesShouldBeRounded> true </SharesShouldBeRounded> |
| </InstanceReport> |