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Long-term Debt - Interest Rates (Details)
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12 Months Ended |
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Dec. 31, 2012
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Bank of America Corporation [Member] | Fixed Rate [Member] | Senior Notes [Member]
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| Debt Instrument [Line Items] |
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| Weighted Average Rate of Debt |
5.26%
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| Weighted Average Rate of Debt Minimum |
1.50%
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| Weighted Average Rate of Debt Maximum |
7.63%
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Bank of America Corporation [Member] | Fixed Rate [Member] | Subordinated Debt [Member]
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| Debt Instrument [Line Items] |
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| Weighted Average Rate of Debt |
5.39%
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| Weighted Average Rate of Debt Minimum |
2.40%
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| Weighted Average Rate of Debt Maximum |
10.20%
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Bank of America Corporation [Member] | Fixed Rate [Member] | Junior Subordinated Debt [Member]
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| Debt Instrument [Line Items] |
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| Weighted Average Rate of Debt |
6.79%
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| Weighted Average Rate of Debt Minimum |
5.25%
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| Weighted Average Rate of Debt Maximum |
11.45%
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Bank of America Corporation [Member] | Floating Rate [Member] | Senior Notes [Member]
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| Debt Instrument [Line Items] |
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| Weighted Average Rate of Debt |
1.15%
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| Weighted Average Rate of Debt Minimum |
0.16%
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| Weighted Average Rate of Debt Maximum |
5.21%
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Bank of America Corporation [Member] | Floating Rate [Member] | Subordinated Debt [Member]
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| Debt Instrument [Line Items] |
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| Weighted Average Rate of Debt |
1.38%
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| Weighted Average Rate of Debt Minimum |
0.11%
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| Weighted Average Rate of Debt Maximum |
3.66%
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Bank of America Corporation [Member] | Floating Rate [Member] | Junior Subordinated Debt [Member]
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| Debt Instrument [Line Items] |
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| Weighted Average Rate of Debt |
1.03%
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| Weighted Average Rate of Debt Minimum |
0.89%
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| Weighted Average Rate of Debt Maximum |
3.69%
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Merrill Lynch and Co., Inc. and Subsidiaries [Member] | Fixed Rate [Member] | Senior Notes [Member]
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| Debt Instrument [Line Items] |
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| Weighted Average Rate of Debt |
5.79%
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| Weighted Average Rate of Debt Minimum |
1.63%
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| Weighted Average Rate of Debt Maximum |
15.00%
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Merrill Lynch and Co., Inc. and Subsidiaries [Member] | Fixed Rate [Member] | Subordinated Debt [Member]
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| Debt Instrument [Line Items] |
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| Weighted Average Rate of Debt |
5.98%
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| Weighted Average Rate of Debt Minimum |
2.61%
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| Weighted Average Rate of Debt Maximum |
8.13%
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Merrill Lynch and Co., Inc. and Subsidiaries [Member] | Fixed Rate [Member] | Junior Subordinated Debt [Member]
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| Debt Instrument [Line Items] |
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| Weighted Average Rate of Debt |
6.91%
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| Weighted Average Rate of Debt Minimum |
6.45%
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| Weighted Average Rate of Debt Maximum |
7.38%
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Merrill Lynch and Co., Inc. and Subsidiaries [Member] | Floating Rate [Member] | Senior Notes [Member]
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| Debt Instrument [Line Items] |
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| Weighted Average Rate of Debt |
0.67%
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| Weighted Average Rate of Debt Minimum |
0.12%
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| Weighted Average Rate of Debt Maximum |
5.06%
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Merrill Lynch and Co., Inc. and Subsidiaries [Member] | Floating Rate [Member] | Subordinated Debt [Member]
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| Debt Instrument [Line Items] |
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| Weighted Average Rate of Debt |
0.89%
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| Weighted Average Rate of Debt Minimum |
0.73%
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| Weighted Average Rate of Debt Maximum |
2.88%
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Bank of America, N.A. and Other Subsidiaries [Member] | Fixed Rate [Member] | Senior Notes [Member]
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| Debt Instrument [Line Items] |
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| Weighted Average Rate of Debt |
7.00%
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| Weighted Average Rate of Debt Minimum |
7.00%
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| Weighted Average Rate of Debt Maximum |
7.00%
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Bank of America, N.A. and Other Subsidiaries [Member] | Fixed Rate [Member] | Subordinated Debt [Member]
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| Debt Instrument [Line Items] |
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| Weighted Average Rate of Debt |
5.68%
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| Weighted Average Rate of Debt Minimum |
5.30%
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| Weighted Average Rate of Debt Maximum |
6.10%
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Bank of America, N.A. and Other Subsidiaries [Member] | Floating Rate [Member] | Senior Notes [Member]
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| Debt Instrument [Line Items] |
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| Weighted Average Rate of Debt |
0.53%
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| Weighted Average Rate of Debt Minimum |
0.39%
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| Weighted Average Rate of Debt Maximum |
0.75%
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Bank of America, N.A. and Other Subsidiaries [Member] | Floating Rate [Member] | Subordinated Debt [Member]
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| Debt Instrument [Line Items] |
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| Weighted Average Rate of Debt |
0.60%
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| Weighted Average Rate of Debt Minimum |
0.36%
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| Weighted Average Rate of Debt Maximum |
0.61%
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Subsidiaries [Member] | Fixed Rate [Member] | Junior Subordinated Debt [Member]
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| Debt Instrument [Line Items] |
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| Weighted Average Rate of Debt |
0.00%
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| Weighted Average Rate of Debt Minimum |
0.00%
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| Weighted Average Rate of Debt Maximum |
0.00%
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Subsidiaries [Member] | Floating Rate [Member] | Junior Subordinated Debt [Member]
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| Debt Instrument [Line Items] |
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| Weighted Average Rate of Debt |
4.87%
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| Weighted Average Rate of Debt Minimum |
0.01%
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| Weighted Average Rate of Debt Maximum |
7.72%
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