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, 2013
Mar. 31, 2012
Trading Securities [Member]
   
Assets:    
Purchases $ 390 $ 405
Sales (520) (463)
Issuances 0 0
Settlements (11) (12)
Purchases, sales, issuances and settlements, net (141) (70)
Trading Securities [Member] | US States and Political Subdivisions [Member]
   
Assets:    
Purchases 77 59
Sales (90) (9)
Issuances 0 0
Settlements 0 0
Purchases, sales, issuances and settlements, net (13) 50
Trading Securities [Member] | Mortgage Backed Securities [Member]
   
Assets:    
Purchases 0 3
Sales (1) (46)
Issuances 0 0
Settlements 0 0
Purchases, sales, issuances and settlements, net (1) (43)
Trading Securities [Member] | Collateralized loan and other debt obligations [Member]
   
Assets:    
Purchases 249 190
Sales (323) (250)
Issuances 0 0
Settlements 0 0
Purchases, sales, issuances and settlements, net (74) (60)
Trading Securities [Member] | Corporate debt securities [Member]
   
Assets:    
Purchases 58 81
Sales (83) (46)
Issuances 0 0
Settlements 0 0
Purchases, sales, issuances and settlements, net (25) 35
Trading Securities [Member] | Total asset-backed securities [Member]
   
Assets:    
Purchases 6 72
Sales (20) (111)
Issuances 0 0
Settlements (11) (12)
Purchases, sales, issuances and settlements, net (25) (51)
Trading Securities [Member] | Equity Securities [Member]
   
Assets:    
Purchases 0 0
Sales (3) (1)
Issuances 0 0
Settlements 0 0
Purchases, sales, issuances and settlements, net (3) (1)
Trading assets (excluding derivatives) [Member]
   
Assets:    
Purchases 390 405
Sales (520) (463)
Issuances 0 0
Settlements (11) (12)
Purchases, sales, issuances and settlements, net (141) (70)
Trading assets (excluding derivatives) [Member] | Trading Account Assets Other [Member]
   
Assets:    
Purchases 0 0
Sales 0 0
Issuances 0 0
Settlements 0 0
Purchases, sales, issuances and settlements, net 0 0
Mortgages held for sale [Member]
   
Assets:    
Purchases 102 111
Sales 0 0
Issuances 0 0
Settlements (162) (157)
Purchases, sales, issuances and settlements, net (60) (46)
Loans Receivable [Member]
   
Assets:    
Purchases 1 2
Sales 0 0
Issuances 117 0
Settlements (69) 0
Purchases, sales, issuances and settlements, net 49 2
Mortgage servicing rights [Member]
   
Assets:    
Purchases 0 0
Sales (423) 0
Issuances 935 1,776
Settlements 0 0
Purchases, sales, issuances and settlements, net 512 1,776
Derivatives [Member]
   
Assets and Liabilities:    
Purchases 97 121
Sales (66) (174)
Issuances 0 0
Settlements (287) (1,314)
Purchases, sales, issuances and settlements, net (256) (1,367)
Derivatives [Member] | Interest Rate Contract [Member]
   
Assets and Liabilities:    
Purchases 0 0
Sales 1 (1)
Issuances 0 0
Settlements (370) (1,431)
Purchases, sales, issuances and settlements, net (369) (1,432)
Derivatives [Member] | Commodity Contract [Member]
   
Assets and Liabilities:    
Purchases 1 5
Sales (1) (7)
Issuances 0 0
Settlements (23) (5)
Purchases, sales, issuances and settlements, net (23) (7)
Derivatives [Member] | Equity Contract [Member]
   
Assets and Liabilities:    
Purchases 99 115
Sales (67) (165)
Issuances 0 0
Settlements (32) 53
Purchases, sales, issuances and settlements, net 0 3
Derivatives [Member] | Foreign Exchange Contract [Member]
   
Assets and Liabilities:    
Purchases 0 0
Sales 0 0
Issuances 0 0
Settlements (2) (5)
Purchases, sales, issuances and settlements, net (2) (5)
Derivatives [Member] | Credit Contract [Member]
   
Assets and Liabilities:    
Purchases (3) 1
Sales 1 (1)
Issuances 0 0
Settlements 140 74
Purchases, sales, issuances and settlements, net 138 74
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 197 3
Sales 0 0
Issuances 0 0
Settlements (9) (16)
Purchases, sales, issuances and settlements, net 188 (13)
Short sale liabilities [Member]
   
Liabilities:    
Purchases 0 0
Sales (8) 0
Issuances 0 0
Settlements 0 0
Purchases, sales, issuances and settlements, net (8) 0
Other Liabilities Excluding Derivatives And Short Sale Liabilities [Member]
   
Liabilities:    
Purchases 0 (1)
Sales 0 2
Issuances (3) 0
Settlements 3 0
Purchases, sales, issuances and settlements, net 0 1
Available for sale Securities [Member]
   
Assets:    
Purchases 1,264 3,366
Sales (121) (30)
Issuances 525 1,086
Settlements (1,583) (3,292)
Purchases, sales, issuances and settlements, net 85 1,130
Available for sale Securities [Member] | Debt Securities [Member]
   
Assets:    
Purchases 1,264 3,366
Sales (121) (26)
Issuances 525 1,086
Settlements (1,574) (3,081)
Purchases, sales, issuances and settlements, net 94 1,345
Available for sale Securities [Member] | US States and Political Subdivisions [Member]
   
Assets:    
Purchases 0 582
Sales (67) 0
Issuances 75 588
Settlements (103) (332)
Purchases, sales, issuances and settlements, net (95) 838
Available for sale Securities [Member] | Mortgage Backed Securities [Member]
   
Assets:    
Purchases 0 0
Sales (1) 0
Issuances 0 0
Settlements (4) (8)
Purchases, sales, issuances and settlements, net (5) (8)
Available for sale Securities [Member] | Residential [Member]
   
Assets:    
Purchases 0 0
Sales 0 0
Issuances 0 0
Settlements 0 (1)
Purchases, sales, issuances and settlements, net 0 (1)
Available for sale Securities [Member] | Commercial [Member]
   
Assets:    
Purchases 0 0
Sales (1) 0
Issuances 0 0
Settlements (4) (7)
Purchases, sales, issuances and settlements, net (5) (7)
Available for sale Securities [Member] | Collateralized loan and other debt obligations [Member]
   
Assets:    
Purchases 402 550
Sales (14) 0
Issuances 0 0
Settlements (93) (226)
Purchases, sales, issuances and settlements, net 295 324
Available for sale Securities [Member] | Corporate debt securities [Member]
   
Assets:    
Purchases 0 0
Sales 0 0
Issuances 0 0
Settlements 0 (4)
Purchases, sales, issuances and settlements, net 0 (4)
Available for sale Securities [Member] | Total asset-backed securities [Member]
   
Assets:    
Purchases 862 2,234
Sales (39) (26)
Issuances 450 498
Settlements (1,374) (2,511)
Purchases, sales, issuances and settlements, net (101) 195
Available for sale Securities [Member] | Auto loans and leases [Member]
   
Assets:    
Purchases 351 1,835
Sales 0 0
Issuances 148 163
Settlements (725) (1,747)
Purchases, sales, issuances and settlements, net (226) 251
Available for sale Securities [Member] | Home Equity Loans [Member]
   
Assets:    
Purchases 0 0
Sales (5) 0
Issuances 0 0
Settlements 0 (1)
Purchases, sales, issuances and settlements, net (5) (1)
Available for sale Securities [Member] | Other asset-backed securities [Member]
   
Assets:    
Purchases 511 399
Sales (34) (26)
Issuances 302 335
Settlements (649) (763)
Purchases, sales, issuances and settlements, net 130 (55)
Available for sale Securities [Member] | Equity Securities [Member]
   
Assets:    
Purchases 0 0
Sales 0 (4)
Issuances 0 0
Settlements (9) (211)
Purchases, sales, issuances and settlements, net (9) (215)
Available for sale Securities [Member] | Perpetual preferred securities [Member]
   
Assets:    
Purchases 0 0
Sales 0 0
Issuances 0 0
Settlements (9) (210)
Purchases, sales, issuances and settlements, net (9) (210)
Available for sale Securities [Member] | Other equity securities [Member]
   
Assets:    
Purchases 0 0
Sales 0 (4)
Issuances 0 0
Settlements 0 (1)
Purchases, sales, issuances and settlements, net $ 0 $ (5)