Quarterly report pursuant to Section 13 or 15(d)

Derivatives (Details)

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Derivatives (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Interest rate risk on USD denominated long-term borrowings | Interest expense
        
Derivative Instruments, Gain (Loss) [Line Items]        
Hedge Ineffectiveness $ (174) $ (116) [1] $ (311) [1] $ (211) [1]
Interest rate risk on USD denominated long-term borrowings | Interest expense | Fair Value Hedging [Member]
        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative 471 [1] 487 [1] 60 [1] 145 [1]
Hedged Item (645) [1],[2] (603) [1],[2] (371) [1],[2] (356) [1],[2]
Interest rate risk on foreign currency denominated long-term borrowings | Interest expense
        
Derivative Instruments, Gain (Loss) [Line Items]        
Hedge Ineffectiveness (67) (57) [1] (94) [1] (106) [1]
Interest rate risk on foreign currency denominated long-term borrowings | Interest expense | Fair Value Hedging [Member]
        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative (412) [1] 407 [1] (324) [1] 680 [1]
Hedged Item 345 [1],[2] (464) [1],[2] 230 [1],[2] (786) [1],[2]
Commodity price risk on commodity inventory | Principal Transactions
        
Derivative Instruments, Gain (Loss) [Line Items]        
Hedge Ineffectiveness 0      
Commodity price risk on commodity inventory | Principal Transactions | Fair Value Hedging [Member]
        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative (9) [1] 20 [1] 14 [1] 16 [1]
Hedged Item 9 [1],[2] (20) [1],[2] (14) [1],[2] (16) [1],[2]
Long-term Borrowings [Member] | Fair Value Hedging [Member] | Designated as hedging instrument
        
Derivative Instruments, Gain (Loss) [Line Items]        
Fair Value Hedge Assets 6,088 6,940 6,088 6,940
Fair Value Hedge Liabilities 992 841 992 841
Long-term Borrowings [Member] | Fair Value Hedging [Member] | Designated as hedging instrument | Trading Account Assets [Member]
        
Derivative Instruments, Gain (Loss) [Line Items]        
Notional Amount of Fair Value Hedge Instruments 38,696 44,180 38,696 44,180
Long-term Borrowings [Member] | Fair Value Hedging [Member] | Designated as hedging instrument | Trading Liabilities [Member]
        
Derivative Instruments, Gain (Loss) [Line Items]        
Notional Amount of Fair Value Hedge Instruments 10,215 11,092 10,215 11,092
Commodity risk | Fair Value Hedging [Member] | Designated as hedging instrument
        
Derivative Instruments, Gain (Loss) [Line Items]        
Fair Value Hedge Assets 57 70 57 70
Fair Value Hedge Liabilities 3 5 3 5
Commodity risk | Fair Value Hedging [Member] | Designated as hedging instrument | Trading Account Assets [Member]
        
Derivative Instruments, Gain (Loss) [Line Items]        
Notional Amount of Fair Value Hedge Instruments 129 152 129 152
Commodity risk | Fair Value Hedging [Member] | Designated as hedging instrument | Trading Liabilities [Member]
        
Derivative Instruments, Gain (Loss) [Line Items]        
Notional Amount of Fair Value Hedge Instruments $ 6 $ 6 $ 6 $ 6
[1] Amounts are recorded in interest expense and other revenues for long-term borrowings and principal transactions for commodity inventory.
[2] Excludes the impact of the accretion of purchase accounting adjustments made to certain long-term borrowings in connection with the acquisition of Merrill Lynch by Bank of America.