Name:	bac_FairValueInputsAssetsAndLiabilitiesQuantitativeInformationLineItems
Namespace Prefix:	bac_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Selling costs as a percentage of fair value of the asset sold, used as an input to measure fair value.

+ References

No definition available.

+ Details

Name:	bac_FairValueInputsCostToSell
Namespace Prefix:	bac_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

No definition available.

+ Details

Name:	bac_FairValueInputsDiscountRateWeightedAverage
Namespace Prefix:	bac_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average loss, including interest and principal, incurred on a defaulted security, expressed as a percentage of the original principal balance, used as an input to measure fair value.

+ References

No definition available.

+ Details

Name:	bac_FairValueInputsLossSeverityWeightedAverage
Namespace Prefix:	bac_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average rate at which loans or a loan portfolio are expected to prepay principal balances, used as an input to measure fair value.

+ References

No definition available.

+ Details

Name:	bac_FairValueInputsPrepaymentRateWeightedAverage
Namespace Prefix:	bac_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average percentage of likelihood a loan will not be repaid and instead default, used as an input to measure fair value.

+ References

No definition available.

+ Details

Name:	bac_FairValueInputsProbabilityOfDefaultWeightedAverage
Namespace Prefix:	bac_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Yield on loans or leases or portolios of loans and leases used as an input to measure fair value.

+ References

No definition available.

+ Details

Name:	bac_FairValueInputsYield
Namespace Prefix:	bac_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average of yield on loans or leases or portolios of loans and leases used as an input to measure fair value.

+ References

No definition available.

+ Details

Name:	bac_FairValueInputsYieldWeightedAverage
Namespace Prefix:	bac_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This represents the balance of Loans and Leases measured at fair value on a nonrecurring basis categorized as Level 2 and 3 based on observability of inputs.

+ References

No definition available.

+ Details

Name:	bac_LoansAndLeasesFairValueDisclosure
Namespace Prefix:	bac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the fair value of loans and securities.

+ References

No definition available.

+ Details

Name:	bac_LoansAndSecuritiesFairValueDisclosure
Namespace Prefix:	bac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueInputsDiscountRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Loss, including interest and principal, incurred on a defaulted security, expressed as a percentage of the original principal balance, used as an input to measure fair value.

+ References

+ Details

Name:	us-gaap_FairValueInputsLossSeverity
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Rate at which loans or a loan portfolio are expected to prepay principal balances, used as an input to measure fair value.

+ References

+ Details

Name:	us-gaap_FairValueInputsPrepaymentRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of likelihood a loan will not be repaid and instead default, used as an input to measure fair value.

+ References

+ Details

Name:	us-gaap_FairValueInputsProbabilityOfDefault
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents loans held-for-sale as presented on the statement of financial position which may include mortgage loans held-for-sale, finance receivables held-for-sale, or any other loans classified as held-for-sale which are due the Company as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_LoansHeldForSaleFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Fair Value Measurements Fair Value Measurements Nonrecurring Fair Value Inputs (Details) (USD $) In Millions, unless otherwise specified					12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2011 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2012 Fair Value, Measurements, Nonrecurring [Member] Instruments Backed by Commercial Real Estate Assets [Member] Loans and Securities [Member] Fair Value, Inputs, Level 3 [Member] Discounted Cash Flow [Member]	Dec. 31, 2012 Fair Value, Measurements, Nonrecurring [Member] Instruments Backed by Residential Real Estate Assets [Member] Loans and Securities [Member] Fair Value, Inputs, Level 3 [Member] Discounted Cash Flow Market Comparables [Member]	Dec. 31, 2012 Maximum [Member] Fair Value, Measurements, Nonrecurring [Member] Instruments Backed by Commercial Real Estate Assets [Member] Loans and Securities [Member] Fair Value, Inputs, Level 3 [Member] Discounted Cash Flow [Member]	Dec. 31, 2012 Maximum [Member] Fair Value, Measurements, Nonrecurring [Member] Instruments Backed by Residential Real Estate Assets [Member] Loans and Securities [Member] Fair Value, Inputs, Level 3 [Member] Discounted Cash Flow Market Comparables [Member]	Dec. 31, 2012 Minimum [Member] Fair Value, Measurements, Nonrecurring [Member] Instruments Backed by Commercial Real Estate Assets [Member] Loans and Securities [Member] Fair Value, Inputs, Level 3 [Member] Discounted Cash Flow [Member]	Dec. 31, 2012 Minimum [Member] Fair Value, Measurements, Nonrecurring [Member] Instruments Backed by Residential Real Estate Assets [Member] Loans and Securities [Member] Fair Value, Inputs, Level 3 [Member] Discounted Cash Flow Market Comparables [Member]
Fair Value Inputs, Assets And Liabilities, Quantitative Information [Line Items]
Loans and Securities Fair Value Disclosure					$ 388	$ 9,932
Loans held-for-sale	11,659	7,630	1,136	1,008	388	748
Loans And Leases Fair Value Disclosure			$ 9,184	$ 10,629		$ 9,184
Fair Value Inputs Yield							13.00%	5.00%	4.00%	3.00%
Fair Value Inputs, Prepayment Rate								30.00%		3.00%
Fair Value Inputs, Probability of Default								55.00%		0.00%
Fair Value Inputs, Loss Severity							88.00%	66.00%	24.00%	6.00%
Fair Value Inputs, Discount Rate								28.00%		0.00%
Fair Value Inputs, Cost to Sell						8.00%
Fair Value Inputs Yield, Weighted Average					6.00%	3.00%
Fair Value Inputs, Prepayment Rate, Weighted Average						15.00%
Fair Value Inputs, Probability of Default, Weighted Average						7.00%
Fair Value Inputs, Loss Severity, Weighted Average					53.00%	48.00%
Fair Value Inputs, Discount Rate, Weighted Average						15.00%