Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Nonrecurring Fair Value Inputs (Details)

v2.4.1.9
Fair Value Measurements - Nonrecurring Fair Value Inputs (Details) (Nonrecurring, Level 3, USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Market Comparables
    
Fair Value Inputs [Abstract]    
Cost to sell   8.00%bac_FairValueInputsCostToSell
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
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/ us-gaap_ValuationTechniqueAxis
= us-gaap_MarketApproachValuationTechniqueMember
Market Comparables | Minimum
    
Fair Value Inputs [Abstract]    
Discount Rate 0.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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/ us-gaap_RangeAxis
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/ us-gaap_ValuationTechniqueAxis
= us-gaap_MarketApproachValuationTechniqueMember 		0.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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Cost to sell 7.00%bac_FairValueInputsCostToSell
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/ us-gaap_ValuationTechniqueAxis
= us-gaap_MarketApproachValuationTechniqueMember 		 
Market Comparables | Maximum
    
Fair Value Inputs [Abstract]    
Discount Rate 28.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
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/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_MarketApproachValuationTechniqueMember 		19.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
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/ us-gaap_ValuationTechniqueAxis
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Cost to sell 14.00%bac_FairValueInputsCostToSell
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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/ us-gaap_FairValueByMeasurementFrequencyAxis
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/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
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Instruments backed by residential real estate assets
    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Assets, fair value 4,636us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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/ us-gaap_FairValueByMeasurementFrequencyAxis
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/ us-gaap_ProductOrServiceAxis
= bac_InstrumentsBackedByResidentialRealEstateAssetsMember 		5,240us-gaap_AssetsFairValueDisclosure
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/ us-gaap_ProductOrServiceAxis
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Instruments backed by residential real estate assets | Market Comparables | Weighted Average
    
Fair Value Inputs [Abstract]    
Discount Rate 8.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
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/ us-gaap_RangeAxis
= us-gaap_WeightedAverageMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_MarketApproachValuationTechniqueMember 		8.00%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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Instruments backed by residential real estate assets | Loans and leases
    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Assets, fair value 4,636us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
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/ us-gaap_ProductOrServiceAxis
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/ us-gaap_ProductOrServiceAxis
= bac_InstrumentsBackedByResidentialRealEstateAssetsMember
Loans | Market Comparables | Weighted Average
    
Fair Value Inputs [Abstract]    
Discount Rate 8.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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