v2.4.0.8
Fair Value, Assets and Liabilities Measured on Recurring Basis Level 3 Reconciliation (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Trading Securities [Member]
        
Assets:        
Balance, beginning of period $ 718 $ 1,995 $ 987 $ 2,034
Net gains (losses) included in net income 22 21 71 48
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net (54) (354) (195) (424)
Transfers into Level 3 1 0 26 14
Transfers out of Level 3 (20) 0 (222) (10)
Balance, end of period 667 1,662 667 1,662
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end (24) 2 (19) (5)
Trading Securities [Member] | US States and Political Subdivisions [Member]
        
Assets:        
Balance, beginning of period 36 103 46 53
Net gains (losses) included in net income (1) 0 2 0
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net 5 (45) (8) 5
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Balance, end of period 40 58 40 58
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 0 (1)
Trading Securities [Member] | Mortgage Backed Securities [Member]
        
Assets:        
Balance, beginning of period 5 54 6 108
Net gains (losses) included in net income 1 4 1 3
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net 3 35 2 (8)
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 (10)
Balance, end of period 9 93 9 93
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end 0 2 1 (2)
Trading Securities [Member] | Collateralized loan and other debt obligations [Member]
        
Assets:        
Balance, beginning of period 505 1,539 742 1,582
Net gains (losses) included in net income 25 1 64 18
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net (35) (267) (109) (327)
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 (202) 0
Balance, end of period 495 1,273 495 1,273
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end (13) (11) (11) (16)
Trading Securities [Member] | Corporate debt securities [Member]
        
Assets:        
Balance, beginning of period 29 132 52 97
Net gains (losses) included in net income 0 (2) 2 (2)
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net (16) (74) (41) (39)
Transfers into Level 3 1 0 1 0
Transfers out of Level 3 0 0 0 0
Balance, end of period 14 56 14 56
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end (1) (1) 0 (2)
Trading Securities [Member] | Total asset-backed securities [Member]
        
Assets:        
Balance, beginning of period 143 164 138 190
Net gains (losses) included in net income (3) 17 2 28
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net (11) (2) (36) (53)
Transfers into Level 3 0 0 25 14
Transfers out of Level 3 (20) 0 (20) 0
Balance, end of period 109 179 109 179
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end (10) 12 (9) 16
Trading Securities [Member] | Equity Securities [Member]
        
Assets:        
Balance, beginning of period 0 3 3 4
Net gains (losses) included in net income 0 1 0 1
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net 0 (1) (3) (2)
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Balance, end of period 0 3 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 0 0
Trading assets (excluding derivatives) [Member]
        
Assets:        
Balance, beginning of period 788 2,103 1,063 2,149
Net gains (losses) included in net income 15 4 58 24
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net (54) (354) (195) (424)
Transfers into Level 3 1 0 26 14
Transfers out of Level 3 (20) 0 (222) (10)
Balance, end of period 730 1,753 730 1,753
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end (26) (9) (23) (16)
Trading assets (excluding derivatives) [Member] | Trading Account Assets Other [Member]
        
Assets:        
Balance, beginning of period 70 108 76 115
Net gains (losses) included in net income (7) (17) (13) (24)
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net 0 0 0 0
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Balance, end of period 63 91 63 91
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end (2) (11) (4) (11)
Mortgages held for sale [Member]
        
Assets:        
Balance, beginning of period 3,187 3,330 3,250 3,410
Net gains (losses) included in net income 34 1 27 (34)
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net (615) (23) (675) (69)
Transfers into Level 3 81 84 178 171
Transfers out of Level 3 (46) (64) (139) (150)
Balance, end of period 2,641 3,328 2,641 3,328
Net unrealized gains (losses) included in mortgage banking and other noninterest income in the income statement related to assets held at period end (54) 1 (62) (30)
Loans Receivable [Member]
        
Assets:        
Balance, beginning of period 5,975 25 6,021 23
Net gains (losses) included in net income (107) 0 (154) 0
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net 50 (1) 99 1
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 (58) 0 (106) 0
Balance, end of period 5,860 24 5,860 24
Net unrealized gains (losses) included in mortgage banking and other noninterest income in the income statement related to assets held at period end (99) 0 (137) 0
Mortgage servicing rights [Member]
        
Assets:        
Balance, beginning of period 12,061 13,578 11,538 12,603
Net gains (losses) included in net income 1,225 (2,343) 1,236 (3,144)
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net 899 846 1,411 2,622
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Balance, end of period 14,185 12,081 14,185 12,081
Net unrealized gains (losses) included in mortgage banking and other noninterest income in the income statement related to assets held at period end 1,867 (1,631) 2,628 (1,789)
Derivatives [Member]
        
Assets and Liabilities:        
Balance, beginning of period (685) (1,662) (649) (1,588)
Net gains (losses) included in net income (1,230) 2,476 (1,031) 3,789
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net 575 (1,934) 319 (3,301)
Transfers into Level 3 0 0 0 (8)
Transfers out of Level 3 (70) (1) (49) (13)
Balance, end of period (1,410) (1,121) (1,410) (1,121)
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 (651) 260 (724) 224
Derivatives [Member] | Interest Rate Contract [Member]
        
Assets and Liabilities:        
Balance, beginning of period 558 335 659 609
Net gains (losses) included in net income (1,251) 2,528 (983) 3,686
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net 132 (1,957) (237) (3,389)
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Balance, end of period (561) 906 (561) 906
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 (707) 778 (710) 776
Derivatives [Member] | Commodity Contract [Member]
        
Assets and Liabilities:        
Balance, beginning of period (3) (14) 21 0
Net gains (losses) included in net income (3) 22 7 23
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net (8) (4) (31) (11)
Transfers into Level 3 0 0 0 (8)
Transfers out of Level 3 2 0 (9) 0
Balance, end of period (12) 4 (12) 4
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 20 9 26 13
Derivatives [Member] | Equity Contract [Member]
        
Assets and Liabilities:        
Balance, beginning of period (129) (180) (122) (75)
Net gains (losses) included in net income 10 51 (29) (44)
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net 218 (140) 218 (137)
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 (72) 0 (40) (13)
Balance, end of period 27 (269) 27 (269)
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 (3) (505) (31) (629)
Derivatives [Member] | Foreign Exchange Contract [Member]
        
Assets and Liabilities:        
Balance, beginning of period (34) 16 21 (7)
Net gains (losses) included in net income (1) (25) (54) 2
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net 6 11 4 6
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 (1) 0 0
Balance, end of period (29) 1 (29) 1
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 9 (15) (46) 8
Derivatives [Member] | Credit Contract [Member]
        
Assets and Liabilities:        
Balance, beginning of period (1,025) (1,753) (1,150) (1,998)
Net gains (losses) included in net income 0 (60) (13) 111
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net 226 156 364 230
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Balance, end of period (799) (1,657) (799) (1,657)
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 30 (7) 37 56
Derivatives [Member] | Other Contract [Member]
        
Assets and Liabilities:        
Balance, beginning of period (52) (66) (78) (117)
Net gains (losses) included in net income 15 (40) 41 11
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net 1 0 1 0
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Balance, end of period (36) (106) (36) (106)
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 0 0
Other Assets [Member]
        
Assets:        
Balance, beginning of period 348 228 162 244
Net gains (losses) included in net income 38 7 36 4
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net 345 (10) 533 (23)
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Balance, end of period 731 225 731 225
Net unrealized gains (losses) included in trading activities and other noninterest income in the income statement related to assets held at period end 16 5 39 (2)
Short sale liabilities [Member]
        
Liabilities:        
Balance, beginning of period (8) 0 0 0
Net gains (losses) included in net income 0 0 0 0
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net 8 (9) 0 (9)
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Balance, end of period 0 (9) 0 (9)
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 0 0
Other Liabilities Excluding Derivatives And Short Sale Liabilities [Member]
        
Liabilities:        
Balance, beginning of period (48) (42) (49) (44)
Net gains (losses) included in net income 5 (3) 6 (2)
Net gains (losses) included in other comprehensive income 0 0 0 0
Purchases, sales, issuances and settlements, net 0 (200) 0 (199)
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Balance, end of period (43) (245) (43) (245)
Net unrealized gains (losses) included in mortgage banking and other noninterest income in the income statement related to liabilities held at period end 4 0 4 0
Available for sale Securities [Member]
        
Assets:        
Balance, beginning of period 16,982 33,490 27,439 31,856
Net gains (losses) included in net income (4) 58 24 143
Net gains (losses) included in other comprehensive income (66) (27) 40 442
Purchases, sales, issuances and settlements, net (618) 16 (533) 1,146
Transfers into Level 3 0 14 0 57
Transfers out of Level 3 (165) (3,943) (10,841) (4,036)
Balance, end of period 16,129 29,608 16,129 29,608
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 (10) (24) (10) (53)
Available for sale Securities [Member] | Debt Securities [Member]
        
Assets:        
Balance, beginning of period 16,175 32,314 26,645 30,489
Net gains (losses) included in net income (6) 17 21 71
Net gains (losses) included in other comprehensive income (68) 5 17 481
Purchases, sales, issuances and settlements, net (595) 272 (501) 1,617
Transfers into Level 3 0 14 0 57
Transfers out of Level 3 (165) (3,943) (10,841) (4,036)
Balance, end of period 15,341 28,679 15,341 28,679
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end (10) (24) (10) (53)
Available for sale Securities [Member] | US States and Political Subdivisions [Member]
        
Assets:        
Balance, beginning of period 3,529 12,514 3,631 11,516
Net gains (losses) included in net income 2 (1) 4 (5)
Net gains (losses) included in other comprehensive income (58) 30 (67) 194
Purchases, sales, issuances and settlements, net 451 863 356 1,701
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 (165) (3,901) (165) (3,901)
Balance, end of period 3,759 9,505 3,759 9,505
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end 0 (3) 0 (10)
Available for sale Securities [Member] | Mortgage Backed Securities [Member]
        
Assets:        
Balance, beginning of period 287 290 297 293
Net gains (losses) included in net income (3) 12 (10) (3)
Net gains (losses) included in other comprehensive income 14 9 28 32
Purchases, sales, issuances and settlements, net (6) (77) (11) (85)
Transfers into Level 3 0 1 0 28
Transfers out of Level 3 0 (31) (12) (61)
Balance, end of period 292 204 292 204
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end (3) (1) (3) (18)
Available for sale Securities [Member] | Residential [Member]
        
Assets:        
Balance, beginning of period 95 58 94 61
Net gains (losses) included in net income 1 11 (3) 11
Net gains (losses) included in other comprehensive income 5 10 11 11
Purchases, sales, issuances and settlements, net (3) (34) (3) (35)
Transfers into Level 3 0 1 0 28
Transfers out of Level 3 0 (31) (1) (61)
Balance, end of period 98 15 98 15
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end 0 0 0 (1)
Available for sale Securities [Member] | Commercial [Member]
        
Assets:        
Balance, beginning of period 192 232 203 232
Net gains (losses) included in net income (4) 1 (7) (14)
Net gains (losses) included in other comprehensive income 9 (1) 17 21
Purchases, sales, issuances and settlements, net (3) (43) (8) (50)
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 (11) 0
Balance, end of period 194 189 194 189
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end (3) (1) (3) (17)
Available for sale Securities [Member] | Collateralized loan and other debt obligations [Member]
        
Assets:        
Balance, beginning of period 2,938 9,163 13,188 8,599
Net gains (losses) included in net income (3) 28 (4) 85
Net gains (losses) included in other comprehensive income 22 (6) 91 177
Purchases, sales, issuances and settlements, net 270 (38) 565 286
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 (10,613) 0
Balance, end of period 3,227 9,147 3,227 9,147
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end 0 0 0 0
Available for sale Securities [Member] | Corporate debt securities [Member]
        
Assets:        
Balance, beginning of period 281 308 274 295
Net gains (losses) included in net income 2 (2) 4 3
Net gains (losses) included in other comprehensive income (17) (16) (9) (5)
Purchases, sales, issuances and settlements, net (23) (4) (23) (8)
Transfers into Level 3 0 0 0 1
Transfers out of Level 3 0 0 (3) 0
Balance, end of period 243 286 243 286
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end 0 0 0 0
Available for sale Securities [Member] | Total asset-backed securities [Member]
        
Assets:        
Balance, beginning of period 9,140 10,039 9,255 9,786
Net gains (losses) included in net income (4) (20) 27 (9)
Net gains (losses) included in other comprehensive income (29) (12) (26) 83
Purchases, sales, issuances and settlements, net (1,287) (472) (1,388) (277)
Transfers into Level 3 0 13 0 28
Transfers out of Level 3 0 (11) (48) (74)
Balance, end of period 7,820 9,537 7,820 9,537
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end (7) (20) (7) (25)
Available for sale Securities [Member] | Auto loans and leases [Member]
        
Assets:        
Balance, beginning of period 5,704 6,913 5,921 6,641
Net gains (losses) included in net income 0 2 0 3
Net gains (losses) included in other comprehensive income (34) (13) (25) 7
Purchases, sales, issuances and settlements, net (798) (696) (1,024) (445)
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Balance, end of period 4,872 6,206 4,872 6,206
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end 0 0 0 0
Available for sale Securities [Member] | Home Equity Loans [Member]
        
Assets:        
Balance, beginning of period 0 257 51 282
Net gains (losses) included in net income 0 4 3 11
Net gains (losses) included in other comprehensive income 0 (4) (1) 14
Purchases, sales, issuances and settlements, net 0 (2) (5) (3)
Transfers into Level 3 0 13 0 27
Transfers out of Level 3 0 (11) (48) (74)
Balance, end of period 0 257 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 (4) 0 (4)
Available for sale Securities [Member] | Other asset-backed securities [Member]
        
Assets:        
Balance, beginning of period 3,436 2,869 3,283 2,863
Net gains (losses) included in net income (4) (26) 24 (23)
Net gains (losses) included in other comprehensive income 5 5 0 62
Purchases, sales, issuances and settlements, net (489) 226 (359) 171
Transfers into Level 3 0 0 0 1
Transfers out of Level 3 0 0 0 0
Balance, end of period 2,948 3,074 2,948 3,074
Net unrealized gains (losses) included in debt securities available for sale in the income statement related to assets held at period end (7) (16) (7) (21)
Available for sale Securities [Member] | Equity Securities [Member]
        
Assets:        
Balance, beginning of period 807 1,176 794 1,367
Net gains (losses) included in net income 2 41 3 72
Net gains (losses) included in other comprehensive income 2 (32) 23 (39)
Purchases, sales, issuances and settlements, net (23) (256) (32) (471)
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Balance, end of period 788 929 788 929
Net unrealized gains (losses) included in equity investments in the income statement related to assets held at period end 0 0 0 0
Available for sale Securities [Member] | Perpetual preferred securities [Member]
        
Assets:        
Balance, beginning of period 807 1,173 794 1,344
Net gains (losses) included in net income 2 40 3 71
Net gains (losses) included in other comprehensive income 2 (32) 23 (24)
Purchases, sales, issuances and settlements, net (23) (254) (32) (464)
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Balance, end of period 788 927 788 927
Net unrealized gains (losses) included in equity investments in the income statement related to assets held at period end 0 0 0 0
Available for sale Securities [Member] | Other equity securities [Member]
        
Assets:        
Balance, beginning of period 0 3 0 23
Net gains (losses) included in net income 0 1 0 1
Net gains (losses) included in other comprehensive income 0 0 0 (15)
Purchases, sales, issuances and settlements, net 0 (2) 0 (7)
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Balance, end of period 0 2 0 2
Net unrealized gains (losses) included in equity investments in the income statement related to assets held at period end $ 0 $ 0 $ 0 $ 0