Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Nonrecurring Fair Value Inputs (Details)

v2.4.1.9
Fair Value Measurements - Nonrecurring Fair Value Inputs (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Instruments backed by residential real estate assets    
Fair Value Inputs [Abstract]    
Frequency of appraisals conducted 90 days  
Nonrecurring | Level 3 | Market Comparables | Minimum    
Fair Value Inputs [Abstract]    
Discount Rate 0.00%us-gaap_FairValueInputsDiscountRate
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/ us-gaap_FairValueByMeasurementFrequencyAxis
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/ us-gaap_RangeAxis
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/ us-gaap_ValuationTechniqueAxis
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/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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/ us-gaap_FairValueByMeasurementFrequencyAxis
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Cost to sell 7.00%bac_FairValueInputsCostToSell
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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/ us-gaap_FairValueByMeasurementFrequencyAxis
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/ us-gaap_ValuationTechniqueAxis
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/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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/ us-gaap_ValuationTechniqueAxis
= us-gaap_MarketApproachValuationTechniqueMember
Nonrecurring | Level 3 | Market Comparables | Maximum    
Fair Value Inputs [Abstract]    
Discount Rate 26.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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/ us-gaap_FairValueByMeasurementFrequencyAxis
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/ us-gaap_RangeAxis
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/ us-gaap_ValuationTechniqueAxis
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/ us-gaap_ValuationTechniqueAxis
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Cost to sell 16.00%bac_FairValueInputsCostToSell
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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/ us-gaap_FairValueByMeasurementFrequencyAxis
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/ us-gaap_RangeAxis
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/ us-gaap_ValuationTechniqueAxis
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/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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/ us-gaap_RangeAxis
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/ us-gaap_ValuationTechniqueAxis
= us-gaap_MarketApproachValuationTechniqueMember
Nonrecurring | Level 3 | Instruments backed by residential real estate assets    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Assets, fair value 1,167us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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/ us-gaap_FairValueByMeasurementFrequencyAxis
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/ us-gaap_ProductOrServiceAxis
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/ us-gaap_ProductOrServiceAxis
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Nonrecurring | Level 3 | Instruments backed by residential real estate assets | Market Comparables | Weighted Average    
Fair Value Inputs [Abstract]    
Discount Rate 10.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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/ us-gaap_ValuationTechniqueAxis
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/ us-gaap_RangeAxis
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/ us-gaap_ValuationTechniqueAxis
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Cost to sell 7.00%bac_FairValueInputsCostToSell
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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/ us-gaap_FairValueByMeasurementFrequencyAxis
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/ us-gaap_ProductOrServiceAxis
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/ us-gaap_RangeAxis
= us-gaap_WeightedAverageMember
/ us-gaap_ValuationTechniqueAxis
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/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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/ us-gaap_FairValueByMeasurementFrequencyAxis
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/ us-gaap_ProductOrServiceAxis
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/ us-gaap_RangeAxis
= us-gaap_WeightedAverageMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_MarketApproachValuationTechniqueMember
Nonrecurring | Level 3 | Instruments backed by residential real estate assets | Loans and leases    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Assets, fair value 1,167us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
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/ us-gaap_ProductOrServiceAxis
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