Annual report pursuant to Section 13 and 15(d)

Derivatives - Derivatives Designated as Accounting Hedges - Fair Value Hedges (Details)

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Derivatives - Derivatives Designated as Accounting Hedges - Fair Value Hedges (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Effect of Fair Value Hedges on Results of Operations [Abstract]      
Derivative $ (6,206) $ (69) $ (3,186)
Hedged Item 4,448 (718) 2,134
Hedge Ineffectiveness (1,758) (787) (1,052)
Interest Rate Risk On Long Tern Debt [Member] | Interest Expense [Member]
     
Effect of Fair Value Hedges on Results of Operations [Abstract]      
Derivative 4,384 [1] 2,952 [1] (4,858) [1]
Hedged Item (4,969) [1] (3,496) [1] 4,082 [1]
Hedge Ineffectiveness (585) [1] (544) [1] (776) [1]
Interest Rate and Foreign Currency Risk on Long Term Debt [Member] | Interest Expense [Member]
     
Effect of Fair Value Hedges on Results of Operations [Abstract]      
Derivative 780 [1] (463) [1] 932 [1]
Hedged Item (1,057) [1] 130 [1] (858) [1]
Hedge Ineffectiveness (277) [1] (333) [1] 74 [1]
Interest Rate Risk on Available For Sale Securities [Member] | Interest Income [Member]
     
Effect of Fair Value Hedges on Results of Operations [Abstract]      
Derivative (11,386) [2] (2,577) [2] 791 [2]
Hedged Item 10,490 [2] 2,667 [2] (1,141) [2]
Hedge Ineffectiveness (896) [2] 90 [2] (350) [2]
Commodity Contract [Member] | Trading Account Profits (Losses) [Member]
     
Effect of Fair Value Hedges on Results of Operations [Abstract]      
Derivative 16 [3] 19 [3] (51) [3]
Hedged Item $ (16) [3] $ (19) [3] $ 51 [3]
[1] Amounts are recorded in interest expense on long-term debt and in other income.
[2] Amounts are recorded in interest income on AFS securities.
[3] Amounts are recorded in trading account profits.