Quarterly report pursuant to Section 13 or 15(d)

Borrowings and Deposits - Debt (Details)

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Borrowings and Deposits - Debt (Details) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Borrowings, Fair Value [Abstract]    
Senior Notes $ 47,206,000,000 $ 47,702,000,000
Senior Structured Notes 28,736,000,000 27,010,000,000
Subordinated Debt 7,001,000,000 10,740,000,000
Junior subordinated notes (related to trust preferred securities) 3,814,000,000 3,809,000,000
Other Subsidiary Financing 1,267,000,000 941,000,000
Debt Issued by consolidated VIEs 8,405,000,000 9,232,000,000
Debt, Long-term and Short-term, Combined Amount 96,429,000,000 99,434,000,000
Short-term borrowings [abstract]    
Other unsecured short-term borrowings 737,000,000 436,000,000
Short-term debt issued by consolidated VIEs 1,772,000,000 [1] 2,940,000,000 [1]
Short-term borrowings 2,509,000,000 3,376,000,000
Long-term borrowings [Abstract]    
Fixed-rate obligations 48,199,000,000 [2],[3] 52,224,000,000 [2],[3]
Variable-rate obligations 35,274,000,000 [2],[4],[5] 33,733,000,000 [2],[4],[5]
Long-term debt issued by consolidated VIEs 6,633,000,000 [1],[2] 6,292,000,000 [1],[2]
Long-term borrowings 90,106,000,000 92,249,000,000
Deposits, Non-U.S. 11,802,000,000 12,873,000,000
Weighted Average Interest Rates [Abstract]    
Short-term borrowings 0.30% 0.20%
Long-term borrowings 3.90% 3.90%
Junior subordinated notes (related to trust preferred securities) 6.90% 6.90%
Aggregated standby letters of credit 1,600,000,000 1,600,000,000
Maturities of Long-term Borrowings [Abstract]    
Less than 1 year 22,762,000,000  
1-2 years 16,830,000,000  
2-3 years 4,697,000,000  
3-4 years 5,819,000,000  
4-5 years 7,197,000,000  
Greater than 5 years $ 32,801,000,000  
Less than 1 year, percentage 25.00%  
1-2 years, percentage 19.00%  
2-3 years, percentage 5.00%  
3-4 years, percentage 6.00%  
4-5 years, percentage 8.00%  
Greater than 5 years, percentage 37.00%  
Total, percentage 100.00%  
[1] See Note 9 for additional information on debt issued by consolidated VIEs.
[2] Excludes junior subordinated notes (related to trust preferred securities).
[3] Fixed-rate obligations are generally swapped to variable rates.
[4] Includes structured notes.
[5] Variable interest rates are generally based on rates such as LIBOR, the U.S. Treasury Bill rate, or the Federal Funds rate.