v2.4.0.6
Fair Value, Assets and Liabilities Measured on Recurring Basis Level 3 Reconciliation (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Trading Securities [Member]
    
Assets:    
Balance, beginning of period $ 987 $ 2,034
Net gains (losses) included in net income 49 27
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net (141) (70)
Transfers into Level 3 25 14
Transfers out of Level 3 (202) (10)
Balance, end of period 718 1,995
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end 7 (13)
Trading Securities [Member] | US States and Political Subdivisions [Member]
    
Assets:    
Balance, beginning of period 46 53
Net gains (losses) included in net income 3 0
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net (13) 50
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, end of period 36 103
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end 1 0
Trading Securities [Member] | Mortgage Backed Securities [Member]
    
Assets:    
Balance, beginning of period 6 108
Net gains (losses) included in net income 0 (1)
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net (1) (43)
Transfers into Level 3 0 0
Transfers out of Level 3 0 (10)
Balance, end of period 5 54
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end 0 (3)
Trading Securities [Member] | Collateralized loan and other debt obligations [Member]
    
Assets:    
Balance, beginning of period 742 1,582
Net gains (losses) included in net income 39 17
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net (74) (60)
Transfers into Level 3 0 0
Transfers out of Level 3 (202) 0
Balance, end of period 505 1,539
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end 4 (12)
Trading Securities [Member] | Corporate debt securities [Member]
    
Assets:    
Balance, beginning of period 52 97
Net gains (losses) included in net income 2 0
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net (25) 35
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, end of period 29 132
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end 2 (2)
Trading Securities [Member] | Total asset-backed securities [Member]
    
Assets:    
Balance, beginning of period 138 190
Net gains (losses) included in net income 5 11
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net (25) (51)
Transfers into Level 3 25 14
Transfers out of Level 3 0 0
Balance, end of period 143 164
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end 0 4
Trading Securities [Member] | Equity Securities [Member]
    
Assets:    
Balance, beginning of period 3 4
Net gains (losses) included in net income 0 0
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net (3) (1)
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, end of period 0 3
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end 0 0
Trading assets (excluding derivatives) [Member]
    
Assets:    
Balance, beginning of period 1,063 2,149
Net gains (losses) included in net income 43 20
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net (141) (70)
Transfers into Level 3 25 14
Transfers out of Level 3 (202) (10)
Balance, end of period 788 2,103
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end 5 (13)
Trading assets (excluding derivatives) [Member] | Trading Account Assets Other [Member]
    
Assets:    
Balance, beginning of period 76 115
Net gains (losses) included in net income (6) (7)
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net 0 0
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, end of period 70 108
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end (2) 0
Mortgages held for sale [Member]
    
Assets:    
Balance, beginning of period 3,250 3,410
Net gains (losses) included in net income (7) (35)
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net (60) (46)
Transfers into Level 3 97 87
Transfers out of Level 3 (93) (86)
Balance, end of period 3,187 3,330
Net unrealized gains (losses) included in mortgage banking and other noninterest income in the income statement related to assets held at period end (7) (36)
Loans Receivable [Member]
    
Assets:    
Balance, beginning of period 6,021 23
Net gains (losses) included in net income (47) 0
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net 49 2
Transfers into Level 3 0 0
Transfers out of Level 3 (48) 0
Balance, end of period 5,975 25
Net unrealized gains (losses) included in mortgage banking and other noninterest income in the income statement related to assets held at period end (39) 0
Mortgage servicing rights [Member]
    
Assets:    
Balance, beginning of period 11,538 12,603
Net gains (losses) included in net income 11 (801)
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net 512 1,776
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, end of period 12,061 13,578
Net unrealized gains (losses) included in mortgage banking and other noninterest income in the income statement related to assets held at period end 761 (158)
Derivatives [Member]
    
Assets and Liabilities:    
Balance, beginning of period (649) (1,588)
Net gains (losses) included in net income 199 1,313
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net (256) (1,367)
Transfers into Level 3 0 (8)
Transfers out of Level 3 21 (12)
Balance, end of period (685) (1,662)
Net unrealized gains (losses) included in mortgage banking, trading activities and other noninterest income in the income statement related to assets and liabilities held at period end 326 361
Derivatives [Member] | Interest Rate Contract [Member]
    
Assets and Liabilities:    
Balance, beginning of period 659 609
Net gains (losses) included in net income 268 1,158
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net (369) (1,432)
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, end of period 558 335
Net unrealized gains (losses) included in mortgage banking, trading activities and other noninterest income in the income statement related to assets and liabilities held at period end 357 199
Derivatives [Member] | Commodity Contract [Member]
    
Assets and Liabilities:    
Balance, beginning of period 21 0
Net gains (losses) included in net income 10 1
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net (23) (7)
Transfers into Level 3 0 (8)
Transfers out of Level 3 (11) 0
Balance, end of period (3) (14)
Net unrealized gains (losses) included in mortgage banking, trading activities and other noninterest income in the income statement related to assets and liabilities held at period end 0 (7)
Derivatives [Member] | Equity Contract [Member]
    
Assets and Liabilities:    
Balance, beginning of period (122) (75)
Net gains (losses) included in net income (39) (95)
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net 0 3
Transfers into Level 3 0 0
Transfers out of Level 3 32 (13)
Balance, end of period (129) (180)
Net unrealized gains (losses) included in mortgage banking, trading activities and other noninterest income in the income statement related to assets and liabilities held at period end 8 (88)
Derivatives [Member] | Foreign Exchange Contract [Member]
    
Assets and Liabilities:    
Balance, beginning of period 21 (7)
Net gains (losses) included in net income (53) 27
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net (2) (5)
Transfers into Level 3 0 0
Transfers out of Level 3 0 1
Balance, end of period (34) 16
Net unrealized gains (losses) included in mortgage banking, trading activities and other noninterest income in the income statement related to assets and liabilities held at period end (56) 24
Derivatives [Member] | Credit Contract [Member]
    
Assets and Liabilities:    
Balance, beginning of period (1,150) (1,998)
Net gains (losses) included in net income (13) 171
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net 138 74
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, end of period (1,025) (1,753)
Net unrealized gains (losses) included in mortgage banking, trading activities and other noninterest income in the income statement related to assets and liabilities held at period end 17 233
Derivatives [Member] | Other Contract [Member]
    
Assets and Liabilities:    
Balance, beginning of period (78) (117)
Net gains (losses) included in net income 26 51
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net 0 0
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, end of period (52) (66)
Net unrealized gains (losses) included in mortgage banking, trading activities and other noninterest income in the income statement related to assets and liabilities held at period end 0 0
Other Assets [Member]
    
Assets:    
Balance, beginning of period 162 244
Net gains (losses) included in net income (2) (3)
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net 188 (13)
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, end of period 348 228
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end (1) (11)
Short sale liabilities [Member]
    
Liabilities:    
Balance, beginning of period 0 0
Net gains (losses) included in net income 0 0
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net (8) 0
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, end of period (8) 0
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to liabilities held at period end 0 0
Other Liabilities Excluding Derivatives And Short Sale Liabilities [Member]
    
Liabilities:    
Balance, beginning of period (49) (44)
Net gains (losses) included in net income 1 1
Net gains (losses) included in other comprehensive income 0 0
Purchases, sales, issuances and settlements, net 0 1
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, end of period (48) (42)
Net unrealized gains (losses) included in mortgage banking and other noninterest income in the income statement related to liabilities held at period end 0 0
Available for sale Securities [Member]
    
Assets:    
Balance, beginning of period 27,439 31,856
Net gains (losses) included in net income 28 85
Net gains (losses) included in other comprehensive income 106 469
Purchases, sales, issuances and settlements, net 85 1,130
Transfers into Level 3 0 43
Transfers out of Level 3 (10,676) (93)
Balance, end of period 16,982 33,490
Net unrealized gains (losses) included in debt securities available for sale and equity investments in the income statement related to assets held at period end (1) (6)
Available for sale Securities [Member] | Debt Securities [Member]
    
Assets:    
Balance, beginning of period 26,645 30,489
Net gains (losses) included in net income 27 54
Net gains (losses) included in other comprehensive income 85 476
Purchases, sales, issuances and settlements, net 94 1,345
Transfers into Level 3 0 43
Transfers out of Level 3 (10,676) (93)
Balance, end of period 16,175 32,314
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end (1) (6)
Available for sale Securities [Member] | US States and Political Subdivisions [Member]
    
Assets:    
Balance, beginning of period 3,631 11,516
Net gains (losses) included in net income 2 (4)
Net gains (losses) included in other comprehensive income (9) 164
Purchases, sales, issuances and settlements, net (95) 838
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, end of period 3,529 12,514
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end 0 (6)
Available for sale Securities [Member] | Mortgage Backed Securities [Member]
    
Assets:    
Balance, beginning of period 297 293
Net gains (losses) included in net income (7) (15)
Net gains (losses) included in other comprehensive income 14 23
Purchases, sales, issuances and settlements, net (5) (8)
Transfers into Level 3 0 27
Transfers out of Level 3 (12) (30)
Balance, end of period 287 290
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end (1) 0
Available for sale Securities [Member] | Residential [Member]
    
Assets:    
Balance, beginning of period 94 61
Net gains (losses) included in net income (4) 0
Net gains (losses) included in other comprehensive income 6 1
Purchases, sales, issuances and settlements, net 0 (1)
Transfers into Level 3 0 27
Transfers out of Level 3 (1) (30)
Balance, end of period 95 58
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end 0 0
Available for sale Securities [Member] | Commercial [Member]
    
Assets:    
Balance, beginning of period 203 232
Net gains (losses) included in net income (3) (15)
Net gains (losses) included in other comprehensive income 8 22
Purchases, sales, issuances and settlements, net (5) (7)
Transfers into Level 3 0 0
Transfers out of Level 3 (11) 0
Balance, end of period 192 232
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end (1) 0
Available for sale Securities [Member] | Collateralized loan and other debt obligations [Member]
    
Assets:    
Balance, beginning of period 13,188 8,599
Net gains (losses) included in net income (1) 57
Net gains (losses) included in other comprehensive income 69 183
Purchases, sales, issuances and settlements, net 295 324
Transfers into Level 3 0 0
Transfers out of Level 3 (10,613) 0
Balance, end of period 2,938 9,163
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end 0 0
Available for sale Securities [Member] | Corporate debt securities [Member]
    
Assets:    
Balance, beginning of period 274 295
Net gains (losses) included in net income 2 5
Net gains (losses) included in other comprehensive income 8 11
Purchases, sales, issuances and settlements, net 0 (4)
Transfers into Level 3 0 1
Transfers out of Level 3 (3) 0
Balance, end of period 281 308
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end 0 0
Available for sale Securities [Member] | Total asset-backed securities [Member]
    
Assets:    
Balance, beginning of period 9,255 9,786
Net gains (losses) included in net income 31 11
Net gains (losses) included in other comprehensive income 3 95
Purchases, sales, issuances and settlements, net (101) 195
Transfers into Level 3 0 15
Transfers out of Level 3 (48) (63)
Balance, end of period 9,140 10,039
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end 0 0
Available for sale Securities [Member] | Auto loans and leases [Member]
    
Assets:    
Balance, beginning of period 5,921 6,641
Net gains (losses) included in net income 0 1
Net gains (losses) included in other comprehensive income 9 20
Purchases, sales, issuances and settlements, net (226) 251
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, end of period 5,704 6,913
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end 0 0
Available for sale Securities [Member] | Home Equity Loans [Member]
    
Assets:    
Balance, beginning of period 51 282
Net gains (losses) included in net income 3 7
Net gains (losses) included in other comprehensive income (1) 18
Purchases, sales, issuances and settlements, net (5) (1)
Transfers into Level 3 0 14
Transfers out of Level 3 (48) (63)
Balance, end of period 0 257
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end 0 0
Available for sale Securities [Member] | Other asset-backed securities [Member]
    
Assets:    
Balance, beginning of period 3,283 2,863
Net gains (losses) included in net income 28 3
Net gains (losses) included in other comprehensive income (5) 57
Purchases, sales, issuances and settlements, net 130 (55)
Transfers into Level 3 0 1
Transfers out of Level 3 0 0
Balance, end of period 3,436 2,869
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end 0 0
Available for sale Securities [Member] | Equity Securities [Member]
    
Assets:    
Balance, beginning of period 794 1,367
Net gains (losses) included in net income 1 31
Net gains (losses) included in other comprehensive income 21 (7)
Purchases, sales, issuances and settlements, net (9) (215)
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, end of period 807 1,176
Net unrealized gains (losses) included in equity investments in the income statement related to assets held at period end 0 0
Available for sale Securities [Member] | Perpetual preferred securities [Member]
    
Assets:    
Balance, beginning of period 794 1,344
Net gains (losses) included in net income 1 31
Net gains (losses) included in other comprehensive income 21 8
Purchases, sales, issuances and settlements, net (9) (210)
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, end of period 807 1,173
Net unrealized gains (losses) included in equity investments in the income statement related to assets held at period end 0 0
Available for sale Securities [Member] | Other equity securities [Member]
    
Assets:    
Balance, beginning of period 0 23
Net gains (losses) included in net income 0 0
Net gains (losses) included in other comprehensive income 0 (15)
Purchases, sales, issuances and settlements, net 0 (5)
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, end of period 0 3
Net unrealized gains (losses) included in equity investments in the income statement related to assets held at period end $ 0 $ 0