v2.4.0.6
Fair Value, Assets and Liabilities Measured on Recurring Basis Level 3 Reconciliation Breakout (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Trading Securities [Member]
   
Assets:    
Purchases $ 405 $ 1,070
Sales (463) (1,035)
Issuances 0 0
Settlements (12) (31)
Purchases, sales, issuances and settlements, net (70) 4
Trading Securities [Member] | US States and Political Subdivisions [Member]
   
Assets:    
Purchases 59 97
Sales (9) (12)
Issuances 0 0
Settlements 0 0
Purchases, sales, issuances and settlements, net 50 85
Trading Securities [Member] | Mortgage Backed Securities [Member]
   
Assets:    
Purchases 3 345
Sales (46) (327)
Issuances 0 0
Settlements 0 0
Purchases, sales, issuances and settlements, net (43) 18
Trading Securities [Member] | Collateralized debt obligations [Member]
   
Assets:    
Purchases 190 365
Sales (250) (366)
Issuances 0 0
Settlements 0 (16)
Purchases, sales, issuances and settlements, net (60) (17)
Trading Securities [Member] | Corporate debt securities [Member]
   
Assets:    
Purchases 81 13
Sales (46) (80)
Issuances 0 0
Settlements 0 0
Purchases, sales, issuances and settlements, net 35 (67)
Trading Securities [Member] | Total asset-backed securities [Member]
   
Assets:    
Purchases 72 245
Sales (111) (243)
Issuances 0 0
Settlements (12) (15)
Purchases, sales, issuances and settlements, net (51) (13)
Trading Securities [Member] | Equity Securities [Member]
   
Assets:    
Purchases 0 5
Sales (1) (7)
Issuances 0 0
Settlements 0 0
Purchases, sales, issuances and settlements, net (1) (2)
Trading assets (excluding derivatives) [Member]
   
Assets:    
Purchases 405 1,072
Sales (463) (1,035)
Issuances 0 0
Settlements (12) (31)
Purchases, sales, issuances and settlements, net (70) 6
Trading assets (excluding derivatives) [Member] | Other Trading Assets [Member]
   
Assets:    
Purchases 0 2
Sales 0 0
Issuances 0 0
Settlements 0 0
Purchases, sales, issuances and settlements, net 0 2
Mortgages held for sale [Member]
   
Assets:    
Purchases 111 219
Sales 0 0
Issuances 0 0
Settlements (157) (177)
Purchases, sales, issuances and settlements, net (46) 42
Loans [Member]
   
Assets:    
Purchases 2 0
Sales 0 (210)
Issuances 0 0
Settlements 0 (11)
Purchases, sales, issuances and settlements, net 2 (221)
Mortgage servicing rights [Member]
   
Assets:    
Purchases 0 0
Sales 0 0
Issuances 1,776 1,262
Settlements 0 0
Purchases, sales, issuances and settlements, net 1,776 1,262
Derivatives [Member]
   
Assets and Liabilities:    
Purchases 121 52
Sales (174) (126)
Issuances 0 0
Settlements (1,314) (159)
Purchases, sales, issuances and settlements, net (1,367) (233)
Derivatives [Member] | Interest Rate Contract [Member]
   
Assets and Liabilities:    
Purchases 0 0
Sales (1) 1
Issuances 0 0
Settlements (1,431) (186)
Purchases, sales, issuances and settlements, net (1,432) (185)
Derivatives [Member] | Commodity Contract [Member]
   
Assets and Liabilities:    
Purchases 5 0
Sales (7) 0
Issuances 0 0
Settlements (5) 1
Purchases, sales, issuances and settlements, net (7) 1
Derivatives [Member] | Equity Contract [Member]
   
Assets and Liabilities:    
Purchases 115 49
Sales (165) (124)
Issuances 0 0
Settlements 53 81
Purchases, sales, issuances and settlements, net 3 6
Derivatives [Member] | Foreign Exchange Contract [Member]
   
Assets and Liabilities:    
Purchases 0 2
Sales 0 (2)
Issuances 0 0
Settlements (5) (7)
Purchases, sales, issuances and settlements, net (5) (7)
Derivatives [Member] | Credit Contract [Member]
   
Assets and Liabilities:    
Purchases 1 1
Sales (1) (1)
Issuances 0 0
Settlements 74 (48)
Purchases, sales, issuances and settlements, net 74 (48)
Derivatives [Member] | Other Contract [Member]
   
Assets and Liabilities:    
Purchases 0 0
Sales 0 0
Issuances 0 0
Settlements 0 0
Purchases, sales, issuances and settlements, net 0 0
Other Assets [Member]
   
Assets:    
Purchases 3 0
Sales 0 (1)
Issuances 0 0
Settlements (16) (4)
Purchases, sales, issuances and settlements, net (13) (5)
Short sale liabilities [Member] | Corporate debt securities [Member]
   
Liabilities:    
Purchases   (114)
Sales   7
Issuances   0
Settlements   0
Purchases, sales, issuances and settlements, net   (107)
Other Liabilities Excluding Derivatives And Short Sale Liabilities [Member]
   
Liabilities:    
Purchases (1) 0
Sales 2 0
Issuances 0 0
Settlements 0 217
Purchases, sales, issuances and settlements, net 1 217
Available for sale Securities [Member]
   
Assets:    
Purchases 3,366 2,692
Sales (30) (116)
Issuances 1,086 0
Settlements (3,292) (3,787)
Purchases, sales, issuances and settlements, net 1,130 (1,211)
Available for sale Securities [Member] | Debt Securities [Member]
   
Assets:    
Purchases 3,366 2,688
Sales (26) (116)
Issuances 1,086 0
Settlements (3,081) (3,267)
Purchases, sales, issuances and settlements, net 1,345 (695)
Available for sale Securities [Member] | US States and Political Subdivisions [Member]
   
Assets:    
Purchases 582 557
Sales 0 6
Issuances 588 0
Settlements (332) (168)
Purchases, sales, issuances and settlements, net 838 395
Available for sale Securities [Member] | Mortgage Backed Securities [Member]
   
Assets:    
Purchases 0 8
Sales 0 0
Issuances 0 0
Settlements (8) (4)
Purchases, sales, issuances and settlements, net (8) 4
Available for sale Securities [Member] | Residential [Member]
   
Assets:    
Purchases 0 4
Sales 0 0
Issuances 0 0
Settlements (1) (2)
Purchases, sales, issuances and settlements, net (1) 2
Available for sale Securities [Member] | Commercial [Member]
   
Assets:    
Purchases 0 4
Sales 0 0
Issuances 0 0
Settlements (7) (2)
Purchases, sales, issuances and settlements, net (7) 2
Available for sale Securities [Member] | Collateralized debt obligations [Member]
   
Assets:    
Purchases 550 865
Sales 0 (20)
Issuances 0 0
Settlements (226) (213)
Purchases, sales, issuances and settlements, net 324 632
Available for sale Securities [Member] | Corporate debt securities [Member]
   
Assets:    
Purchases 0 95
Sales 0 0
Issuances 0 0
Settlements (4) (46)
Purchases, sales, issuances and settlements, net (4) 49
Available for sale Securities [Member] | Total asset-backed securities [Member]
   
Assets:    
Purchases 2,234 1,163
Sales (26) (17)
Issuances 498 0
Settlements (2,511) (2,836)
Purchases, sales, issuances and settlements, net 195 (1,690)
Available for sale Securities [Member] | Auto loans and leases [Member]
   
Assets:    
Purchases 1,835 366
Sales 0 0
Issuances 163 0
Settlements (1,747) (2,217)
Purchases, sales, issuances and settlements, net 251 (1,851)
Available for sale Securities [Member] | Home Equity Loans [Member]
   
Assets:    
Purchases 0 0
Sales 0 0
Issuances 0 0
Settlements (1) (1)
Purchases, sales, issuances and settlements, net (1) (1)
Available for sale Securities [Member] | Other asset-backed securities [Member]
   
Assets:    
Purchases 399 797
Sales (26) (17)
Issuances 335 0
Settlements (763) (618)
Purchases, sales, issuances and settlements, net (55) 162
Available for sale Securities [Member] | Other Debt Securities, Excluding Asset Backed Securities [Member]
   
Assets:    
Purchases 0 0
Sales 0 (85)
Issuances 0 0
Settlements 0 0
Purchases, sales, issuances and settlements, net 0 (85)
Available for sale Securities [Member] | Equity Securities [Member]
   
Assets:    
Purchases 0 4
Sales (4) 0
Issuances 0 0
Settlements (211) (520)
Purchases, sales, issuances and settlements, net (215) (516)
Available for sale Securities [Member] | Perpetual preferred securities [Member]
   
Assets:    
Purchases 0 1
Sales 0 0
Issuances 0 0
Settlements (210) (520)
Purchases, sales, issuances and settlements, net (210) (519)
Available for sale Securities [Member] | Other equity securities [Member]
   
Assets:    
Purchases 0 3
Sales (4) 0
Issuances 0 0
Settlements (1) 0
Purchases, sales, issuances and settlements, net $ (5) $ 3