Annual report pursuant to Section 13 and 15(d)

Fair Value Option - Elections (Details)

v2.4.1.9
Fair Value Option - Elections (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Loans and Loan Commitments      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Fair value option, changes in borrower specific credit risk, gains (losses) on assets $ 32us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_LoansMember 		$ 148us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_LoansMember 		$ 527us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_LoansMember
Loans reported as trading account assets      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Fair value option, changes in borrower specific credit risk, gains (losses) on assets 28us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_TradingAccountAssetsMember 		56us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_TradingAccountAssetsMember 		 
Fair Value Carrying Amount Assets 4,607bac_FairValueOptionFairValueCarryingAmountAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_TradingAccountAssetsMember 		2,406bac_FairValueOptionFairValueCarryingAmountAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_TradingAccountAssetsMember 		 
Contractual Principal Outstanding Assets 8,487bac_FairValueOptionContractualPrincipalOutstandingAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_TradingAccountAssetsMember 		4,541bac_FairValueOptionContractualPrincipalOutstandingAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_TradingAccountAssetsMember 		 
Fair Value Carrying Amount Less Unpaid Principal Assets (3,880)bac_FairValueOptionAggregateDifferencesAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_TradingAccountAssetsMember 		(2,135)bac_FairValueOptionAggregateDifferencesAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_TradingAccountAssetsMember 		 
Trading inventory – other      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Fair Value Carrying Amount Assets 6,865bac_FairValueOptionFairValueCarryingAmountAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_TradingInventoryOtherMember 		5,475bac_FairValueOptionFairValueCarryingAmountAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_TradingInventoryOtherMember 		 
Loans and leases      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Fair Value Carrying Amount Assets 8,681bac_FairValueOptionFairValueCarryingAmountAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_LoansReceivableMember 		10,042bac_FairValueOptionFairValueCarryingAmountAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_LoansReceivableMember 		 
Contractual Principal Outstanding Assets 8,925bac_FairValueOptionContractualPrincipalOutstandingAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_LoansReceivableMember 		10,423bac_FairValueOptionContractualPrincipalOutstandingAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_LoansReceivableMember 		 
Fair Value Carrying Amount Less Unpaid Principal Assets (244)bac_FairValueOptionAggregateDifferencesAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_LoansReceivableMember 		(381)bac_FairValueOptionAggregateDifferencesAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_LoansReceivableMember 		 
Loans Held-for-Sale      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Fair value option, changes in borrower specific credit risk, gains (losses) on assets 84us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_LoansHeldForSaleMember 		225us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_LoansHeldForSaleMember 		425us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_LoansHeldForSaleMember
Fair Value Carrying Amount Assets 6,801bac_FairValueOptionFairValueCarryingAmountAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_LoansHeldForSaleMember 		6,656bac_FairValueOptionFairValueCarryingAmountAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_LoansHeldForSaleMember 		 
Contractual Principal Outstanding Assets 6,920bac_FairValueOptionContractualPrincipalOutstandingAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_LoansHeldForSaleMember 		6,996bac_FairValueOptionContractualPrincipalOutstandingAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_LoansHeldForSaleMember 		 
Fair Value Carrying Amount Less Unpaid Principal Assets (119)bac_FairValueOptionAggregateDifferencesAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_LoansHeldForSaleMember 		(340)bac_FairValueOptionAggregateDifferencesAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_LoansHeldForSaleMember 		 
Securities financing agreements      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Fair Value Carrying Amount Assets 97,539bac_FairValueOptionFairValueCarryingAmountAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_SecuritiesFinancingTransactionFairValueMember 		95,156bac_FairValueOptionFairValueCarryingAmountAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_SecuritiesFinancingTransactionFairValueMember 		 
Contractual Principal Outstanding Assets 97,234bac_FairValueOptionContractualPrincipalOutstandingAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_SecuritiesFinancingTransactionFairValueMember 		94,890bac_FairValueOptionContractualPrincipalOutstandingAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_SecuritiesFinancingTransactionFairValueMember 		 
Fair Value Carrying Amount Less Unpaid Principal Assets 305bac_FairValueOptionAggregateDifferencesAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_SecuritiesFinancingTransactionFairValueMember 		266bac_FairValueOptionAggregateDifferencesAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_SecuritiesFinancingTransactionFairValueMember 		 
Other assets      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Fair Value Carrying Amount Assets 253bac_FairValueOptionFairValueCarryingAmountAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_OtherAssetsMember 		278bac_FairValueOptionFairValueCarryingAmountAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_OtherAssetsMember 		 
Contractual Principal Outstanding Assets 270bac_FairValueOptionContractualPrincipalOutstandingAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_OtherAssetsMember 		270bac_FairValueOptionContractualPrincipalOutstandingAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_OtherAssetsMember 		 
Fair Value Carrying Amount Less Unpaid Principal Assets (17)bac_FairValueOptionAggregateDifferencesAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_OtherAssetsMember 		8bac_FairValueOptionAggregateDifferencesAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_OtherAssetsMember 		 
Long-term deposits      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Fair Value Carrying Amount Liabilities 1,469bac_FairValueOptionFairValueCarryingAmountLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_LongTermDepositsMember 		1,899bac_FairValueOptionFairValueCarryingAmountLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_LongTermDepositsMember 		 
Contractual Principal Outstanding Liabilities 1,361bac_FairValueOptionContractualPrincipalOutstandingLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_LongTermDepositsMember 		1,797bac_FairValueOptionContractualPrincipalOutstandingLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_LongTermDepositsMember 		 
Fair Value Carrying Amount Less Unpaid Principal Liabilities 108bac_FairValueOptionAggregateDifferencesLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_LongTermDepositsMember 		102bac_FairValueOptionAggregateDifferencesLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_LongTermDepositsMember 		 
Unfunded loan commitments      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Fair Value Carrying Amount Liabilities 405bac_FairValueOptionFairValueCarryingAmountLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_UnfundedLoanCommitmentMember 		354bac_FairValueOptionFairValueCarryingAmountLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= bac_UnfundedLoanCommitmentMember 		 
Short-term borrowings      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Fair Value Carrying Amount Liabilities 2,697bac_FairValueOptionFairValueCarryingAmountLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_ShortTermDebtMember 		1,520bac_FairValueOptionFairValueCarryingAmountLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_ShortTermDebtMember 		 
Contractual Principal Outstanding Liabilities 2,697bac_FairValueOptionContractualPrincipalOutstandingLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_ShortTermDebtMember 		1,520bac_FairValueOptionContractualPrincipalOutstandingLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_ShortTermDebtMember 		 
Fair Value Carrying Amount Less Unpaid Principal Liabilities 0bac_FairValueOptionAggregateDifferencesLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_ShortTermDebtMember 		0bac_FairValueOptionAggregateDifferencesLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_ShortTermDebtMember 		 
Long-term debt      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Fair Value Carrying Amount Liabilities 36,404bac_FairValueOptionFairValueCarryingAmountLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_LongTermDebtMember 		47,035bac_FairValueOptionFairValueCarryingAmountLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_LongTermDebtMember 		 
Contractual Principal Outstanding Liabilities 35,815bac_FairValueOptionContractualPrincipalOutstandingLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_LongTermDebtMember 		46,669bac_FairValueOptionContractualPrincipalOutstandingLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_LongTermDebtMember 		 
Fair Value Carrying Amount Less Unpaid Principal Liabilities 589bac_FairValueOptionAggregateDifferencesLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_LongTermDebtMember 		366bac_FairValueOptionAggregateDifferencesLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_LongTermDebtMember 		 
Structured liabilities      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Fair Value Carrying Amount Liabilities 35,300bac_FairValueOptionFairValueCarryingAmountLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_StructuredFinanceMember 		40,700bac_FairValueOptionFairValueCarryingAmountLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_StructuredFinanceMember 		 
Contractual Principal Outstanding Liabilities $ 34,600bac_FairValueOptionContractualPrincipalOutstandingLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_StructuredFinanceMember 		$ 39,700bac_FairValueOptionContractualPrincipalOutstandingLiabilities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_StructuredFinanceMember