Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Funded Status (Details)

v2.4.1.9
Employee Benefit Plans - Funded Status (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Change in fair value of plan assets      
Fair value, December 31 $ 24,133us-gaap_DefinedBenefitPlanFairValueOfPlanAssets $ 23,525us-gaap_DefinedBenefitPlanFairValueOfPlanAssets  
Qualified Pension Plan      
Change in fair value of plan assets      
Fair value, January 1 18,276us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		16,274us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		 
Actual return on plan assets 1,261us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		2,873us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		 
Company contributions 0us-gaap_DefinedBenefitPlanContributionsByEmployer
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		0us-gaap_DefinedBenefitPlanContributionsByEmployer
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= bac_QualifiedPensionPlansMember 		 
Plan participant contributions 0us-gaap_DefinedBenefitPlanContributionsByPlanParticipants
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		0us-gaap_DefinedBenefitPlanContributionsByPlanParticipants
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= bac_QualifiedPensionPlansMember 		 
Settlements and curtailments 0bac_DefinedBenefitPlanSettlementsandCurtailmentsPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		0bac_DefinedBenefitPlanSettlementsandCurtailmentsPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		 
Benefits paid (923)us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		(871)us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		 
Fair value, December 31 18,614us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		18,276us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		16,274us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember
Change in projected benefit obligation      
Projected benefit obligation, January 1 14,145us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		15,655us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		 
Service cost 0us-gaap_DefinedBenefitPlanServiceCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		0us-gaap_DefinedBenefitPlanServiceCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		236us-gaap_DefinedBenefitPlanServiceCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember
Interest cost 665us-gaap_DefinedBenefitPlanInterestCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		623us-gaap_DefinedBenefitPlanInterestCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		681us-gaap_DefinedBenefitPlanInterestCost
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= bac_QualifiedPensionPlansMember
Plan participant contributions 0us-gaap_DefinedBenefitPlanContributionsByPlanParticipants
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= bac_QualifiedPensionPlansMember 		0us-gaap_DefinedBenefitPlanContributionsByPlanParticipants
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= bac_QualifiedPensionPlansMember 		 
Plan amendments 0us-gaap_DefinedBenefitPlanPlanAmendments
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		0us-gaap_DefinedBenefitPlanPlanAmendments
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		1,300us-gaap_DefinedBenefitPlanPlanAmendments
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember
Settlements and curtailments 0bac_DefinedBenefitPlanCurtailmentsandSettlementsBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		17bac_DefinedBenefitPlanCurtailmentsandSettlementsBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		 
Actuarial loss (gain) 1,621us-gaap_DefinedBenefitPlanActuarialGainLoss
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		(1,279)us-gaap_DefinedBenefitPlanActuarialGainLoss
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		 
Benefits paid (923)us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		(871)us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		 
Projected benefit obligation, December 31 15,508us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		14,145us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		15,655us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember
Amount recognized, December 31 3,106us-gaap_DefinedBenefitPlanFundedStatusOfPlan
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		4,131us-gaap_DefinedBenefitPlanFundedStatusOfPlan
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		 
Funded status, December 31      
Accumulated benefit obligation 15,508us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		14,145us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		 
Overfunded (unfunded) status of ABO 3,106bac_DefinedBenefitPlanFundedStatusofPlanExcludingProvisionforFutureSalaries
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		4,131bac_DefinedBenefitPlanFundedStatusofPlanExcludingProvisionforFutureSalaries
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		 
Provision for future salaries 0bac_DefinedBenefitPlanProvisionForFutureSalaries
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		0bac_DefinedBenefitPlanProvisionForFutureSalaries
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		 
Projected benefit obligation 15,508us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		14,145us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		15,655us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember
Weighted-average assumptions, December 31      
Discount rate 4.12%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		4.85%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_QualifiedPensionPlansMember 		 
Non-U.S. Pension Plans      
Change in fair value of plan assets      
Fair value, January 1 2,457us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		2,306us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Actual return on plan assets 256us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		146us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Company contributions 84us-gaap_DefinedBenefitPlanContributionsByEmployer
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		131us-gaap_DefinedBenefitPlanContributionsByEmployer
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Plan participant contributions 1us-gaap_DefinedBenefitPlanContributionsByPlanParticipants
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		1us-gaap_DefinedBenefitPlanContributionsByPlanParticipants
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= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Settlements and curtailments (5)bac_DefinedBenefitPlanSettlementsandCurtailmentsPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		(80)bac_DefinedBenefitPlanSettlementsandCurtailmentsPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Benefits paid (68)us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		(80)us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Foreign currency exchange rate changes (161)us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		33us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Fair value, December 31 2,564us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		2,457us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		2,306us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember
Change in projected benefit obligation      
Projected benefit obligation, January 1 2,580us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		2,460us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Service cost 29us-gaap_DefinedBenefitPlanServiceCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		32us-gaap_DefinedBenefitPlanServiceCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		40us-gaap_DefinedBenefitPlanServiceCost
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= us-gaap_ForeignPensionPlansDefinedBenefitMember
Interest cost 109us-gaap_DefinedBenefitPlanInterestCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		98us-gaap_DefinedBenefitPlanInterestCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		97us-gaap_DefinedBenefitPlanInterestCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember
Plan participant contributions 1us-gaap_DefinedBenefitPlanContributionsByPlanParticipants
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		1us-gaap_DefinedBenefitPlanContributionsByPlanParticipants
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Plan amendments 1us-gaap_DefinedBenefitPlanPlanAmendments
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		2us-gaap_DefinedBenefitPlanPlanAmendments
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Settlements and curtailments (6)bac_DefinedBenefitPlanCurtailmentsandSettlementsBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		(116)bac_DefinedBenefitPlanCurtailmentsandSettlementsBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Actuarial loss (gain) 208us-gaap_DefinedBenefitPlanActuarialGainLoss
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		156us-gaap_DefinedBenefitPlanActuarialGainLoss
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Benefits paid (68)us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		(80)us-gaap_DefinedBenefitPlanBenefitsPaid
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= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Foreign currency exchange rate changes (166)us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		27us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Projected benefit obligation, December 31 2,688us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		2,580us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		2,460us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember
Amount recognized, December 31 (124)us-gaap_DefinedBenefitPlanFundedStatusOfPlan
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		(123)us-gaap_DefinedBenefitPlanFundedStatusOfPlan
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Funded status, December 31      
Accumulated benefit obligation 2,582us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		2,463us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Overfunded (unfunded) status of ABO (18)bac_DefinedBenefitPlanFundedStatusofPlanExcludingProvisionforFutureSalaries
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		(6)bac_DefinedBenefitPlanFundedStatusofPlanExcludingProvisionforFutureSalaries
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Provision for future salaries 106bac_DefinedBenefitPlanProvisionForFutureSalaries
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		117bac_DefinedBenefitPlanProvisionForFutureSalaries
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Projected benefit obligation 2,688us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		2,580us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		2,460us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember
Weighted-average assumptions, December 31      
Discount rate 3.56%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		4.30%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Rate of compensation increase 4.70%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		4.91%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember 		 
Nonqualified and Other Pension Plans      
Change in fair value of plan assets      
Fair value, January 1 2,720us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		3,063us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		 
Actual return on plan assets 336us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		(217)us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		 
Company contributions 97us-gaap_DefinedBenefitPlanContributionsByEmployer
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		98us-gaap_DefinedBenefitPlanContributionsByEmployer
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		 
Plan participant contributions 0us-gaap_DefinedBenefitPlanContributionsByPlanParticipants
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		0us-gaap_DefinedBenefitPlanContributionsByPlanParticipants
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= bac_NonqualifiedAndOtherPensionPlansMember 		 
Settlements and curtailments 0bac_DefinedBenefitPlanSettlementsandCurtailmentsPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		(7)bac_DefinedBenefitPlanSettlementsandCurtailmentsPlanAssets
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= bac_NonqualifiedAndOtherPensionPlansMember 		 
Benefits paid (226)us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		(217)us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		 
Fair value, December 31 2,927us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		2,720us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		3,063us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember
Change in projected benefit obligation      
Projected benefit obligation, January 1 3,070us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		3,334us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		 
Service cost 1us-gaap_DefinedBenefitPlanServiceCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		1us-gaap_DefinedBenefitPlanServiceCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		1us-gaap_DefinedBenefitPlanServiceCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember
Interest cost 133us-gaap_DefinedBenefitPlanInterestCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		120us-gaap_DefinedBenefitPlanInterestCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		138us-gaap_DefinedBenefitPlanInterestCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember
Plan participant contributions 0us-gaap_DefinedBenefitPlanContributionsByPlanParticipants
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		0us-gaap_DefinedBenefitPlanContributionsByPlanParticipants
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		 
Plan amendments 0us-gaap_DefinedBenefitPlanPlanAmendments
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		0us-gaap_DefinedBenefitPlanPlanAmendments
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		 
Settlements and curtailments 0bac_DefinedBenefitPlanCurtailmentsandSettlementsBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		(7)bac_DefinedBenefitPlanCurtailmentsandSettlementsBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		 
Actuarial loss (gain) 351us-gaap_DefinedBenefitPlanActuarialGainLoss
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		(161)us-gaap_DefinedBenefitPlanActuarialGainLoss
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		 
Benefits paid (226)us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		(217)us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		 
Projected benefit obligation, December 31 3,329us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		3,070us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		3,334us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember
Amount recognized, December 31 (402)us-gaap_DefinedBenefitPlanFundedStatusOfPlan
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		(350)us-gaap_DefinedBenefitPlanFundedStatusOfPlan
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		 
Funded status, December 31      
Accumulated benefit obligation 3,329us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		3,067us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		 
Overfunded (unfunded) status of ABO (402)bac_DefinedBenefitPlanFundedStatusofPlanExcludingProvisionforFutureSalaries
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		(347)bac_DefinedBenefitPlanFundedStatusofPlanExcludingProvisionforFutureSalaries
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		 
Provision for future salaries 0bac_DefinedBenefitPlanProvisionForFutureSalaries
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		3bac_DefinedBenefitPlanProvisionForFutureSalaries
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		 
Projected benefit obligation 3,329us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		3,070us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		3,334us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember
Weighted-average assumptions, December 31      
Discount rate 3.80%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		4.55%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		 
Rate of compensation increase 4.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		4.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_NonqualifiedAndOtherPensionPlansMember 		 
Postretirement Health and Life Plans      
Change in fair value of plan assets      
Fair value, January 1 72us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		86us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		 
Actual return on plan assets 6us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		9us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		 
Company contributions 53us-gaap_DefinedBenefitPlanContributionsByEmployer
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		61us-gaap_DefinedBenefitPlanContributionsByEmployer
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		 
Plan participant contributions 129us-gaap_DefinedBenefitPlanContributionsByPlanParticipants
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		138us-gaap_DefinedBenefitPlanContributionsByPlanParticipants
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		 
Settlements and curtailments 0bac_DefinedBenefitPlanSettlementsandCurtailmentsPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		0bac_DefinedBenefitPlanSettlementsandCurtailmentsPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		 
Benefits paid (248)us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		(237)us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		 
Federal subsidy on benefits paid 16us-gaap_DefinedBenefitPlanGrossPrescriptionDrugSubsidyReceiptsReceived
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		15us-gaap_DefinedBenefitPlanGrossPrescriptionDrugSubsidyReceiptsReceived
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		 
Fair value, December 31 28us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		72us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		86us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember
Change in projected benefit obligation      
Projected benefit obligation, January 1 1,356us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		1,574us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		 
Service cost 8us-gaap_DefinedBenefitPlanServiceCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		9us-gaap_DefinedBenefitPlanServiceCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		13us-gaap_DefinedBenefitPlanServiceCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember
Interest cost 58us-gaap_DefinedBenefitPlanInterestCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		54us-gaap_DefinedBenefitPlanInterestCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		71us-gaap_DefinedBenefitPlanInterestCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember
Plan participant contributions 129us-gaap_DefinedBenefitPlanContributionsByPlanParticipants
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		138us-gaap_DefinedBenefitPlanContributionsByPlanParticipants
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		 
Plan amendments 0us-gaap_DefinedBenefitPlanPlanAmendments
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		0us-gaap_DefinedBenefitPlanPlanAmendments
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		 
Settlements and curtailments 0bac_DefinedBenefitPlanCurtailmentsandSettlementsBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		0bac_DefinedBenefitPlanCurtailmentsandSettlementsBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		 
Actuarial loss (gain) 29us-gaap_DefinedBenefitPlanActuarialGainLoss
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		(197)us-gaap_DefinedBenefitPlanActuarialGainLoss
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		 
Benefits paid (248)us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		(237)us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		 
Federal subsidy on benefits paid 16us-gaap_DefinedBenefitPlanGrossPrescriptionDrugSubsidyReceiptsReceived
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		15us-gaap_DefinedBenefitPlanGrossPrescriptionDrugSubsidyReceiptsReceived
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		 
Foreign currency exchange rate changes (2)us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		0us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		 
Projected benefit obligation, December 31 1,346us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		1,356us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		1,574us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember
Amount recognized, December 31 (1,318)us-gaap_DefinedBenefitPlanFundedStatusOfPlan
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		(1,284)us-gaap_DefinedBenefitPlanFundedStatusOfPlan
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		 
Funded status, December 31      
Projected benefit obligation $ 1,346us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		$ 1,356us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		$ 1,574us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember
Weighted-average assumptions, December 31      
Discount rate 3.75%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember 		4.50%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bac_PostretirementHealthCoverageandLifeInsuranceMember