Fair Value Measurements (Tables)

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Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value Assets and liabilities measured on Recurring basis	Assets and liabilities carried at fair value on a recurring basis at March 31, 2013 and December 31, 2012, including financial instruments which the Corporation accounts for under the fair value option, are summarized in the following tables.   March 31, 2013   Fair Value Measurements         (Dollars in millions) Level 1 (1)   Level 2 (1)   Level 3   Netting Adjustments (2)   Assets/Liabilities at Fair Value Assets                   Federal funds sold and securities borrowed or purchased under agreements to resell $ —   $ 94,673   $ —   $ —   $ 94,673 Trading account assets:                   U.S. government and agency securities 47,957   24,921   —   —   72,878 Corporate securities, trading loans and other 1,702   33,874   3,607   —   39,183 Equity securities 31,398   13,968   497   —   45,863 Non-U.S. sovereign debt 33,681   14,536   417   —   48,634 Mortgage trading loans and ABS —   11,990   4,480   —   16,470 Total trading account assets 114,738   99,289   9,001   —   223,028 Derivative assets (3) 5,078   1,201,709   8,011   (1,162,551 )   52,247 AFS debt securities:                   U.S. Treasury securities and agency securities 14,639   2,800   —   —   17,439 Mortgage-backed securities:                   Agency —   174,268   —   —   174,268 Agency-collateralized mortgage obligations —   34,761   —   —   34,761 Non-agency residential —   8,877   —   —   8,877 Non-agency commercial —   3,824   10   —   3,834 Non-U.S. securities 2,699   2,950   1   —   5,650 Corporate/Agency bonds —   1,289   96   —   1,385 Other taxable securities 20   6,989   4,045   —   11,054 Tax-exempt securities —   3,541   1,041   —   4,582 Total AFS debt securities 17,358   239,299   5,193   —   261,850 Other debt securities carried at fair value:                   U.S. Treasury securities and agency securities 3,861   —   —   —   3,861 Mortgage-backed securities:                   Agency —   29,178   —   —   29,178 Agency-collateralized mortgage obligations —   958   —   —   958 Non-agency commercial —   103   —   —   103 Non-U.S. securities 8,872   310   —   —   9,182 Total other debt securities carried at fair value 12,733   30,549   —   —   43,282 Loans and leases —   6,457   2,363   —   8,820 Mortgage servicing rights —   —   5,776   —   5,776 Loans held-for-sale —   11,482   2,405   —   13,887 Other assets 15,578   5,036   2,629   —   23,243 Total assets $ 165,485   $ 1,688,494   $ 35,378   $ (1,162,551 )   $ 726,806 Liabilities                   Interest-bearing deposits in U.S. offices $ —   $ 2,130   $ —   $ —   $ 2,130 Federal funds purchased and securities loaned or sold under agreements to repurchase —   47,842   —   —   47,842 Trading account liabilities:                   U.S. government and agency securities 25,292   472   —   —   25,764 Equity securities 21,786   2,963   —   —   24,749 Non-U.S. sovereign debt 27,945   1,432   —   —   29,377 Corporate securities and other 574   10,025   58   —   10,657 Total trading account liabilities 75,597   14,892   58   —   90,547 Derivative liabilities (3) 3,888   1,184,636   6,948   (1,147,647 )   47,825 Short-term borrowings —   3,168   —   —   3,168 Accrued expenses and other liabilities 12,016   1,814   455   —   14,285 Long-term debt —   50,006   2,355   —   52,361 Total liabilities $ 91,501   $ 1,304,488   $ 9,816   $ (1,147,647 )   $ 258,158 (1)  During the three months ended March 31, 2013, $500 million of assets were transferred from Level 1 to Level 2 primarily due to a restriction that became effective for a private equity investment. (2)  Amounts represent the impact of legally enforceable master netting agreements and also cash collateral held or placed with the same counterparties. (3)  For further disaggregation of derivative assets and liabilities, see Note 3 – Derivatives.   December 31, 2012   Fair Value Measurements         (Dollars in millions) Level 1 (1)   Level 2 (1)   Level 3   Netting Adjustments (2)   Assets/Liabilities at Fair Value Assets                   Federal funds sold and securities borrowed or purchased under agreements to resell $ —   $ 98,670   $ —   $ —   $ 98,670 Trading account assets:                   U.S. government and agency securities 57,655   29,319   —   —   86,974 Corporate securities, trading loans and other 1,292   32,882   3,726   —   37,900 Equity securities 28,144   14,626   545   —   43,315 Non-U.S. sovereign debt 29,254   13,139   353   —   42,746 Mortgage trading loans and ABS —   11,905   4,935   —   16,840 Total trading account assets 116,345   101,871   9,559   —   227,775 Derivative assets (3) 2,997   1,372,398   8,073   (1,329,971 )   53,497 AFS debt securities:                   U.S. Treasury securities and agency securities 21,514   2,958   —   —   24,472 Mortgage-backed securities:                   Agency —   188,149   —   —   188,149 Agency-collateralized mortgage obligations —   37,538   —   —   37,538 Non-agency residential —   9,494   —   —   9,494 Non-agency commercial —   3,914   10   —   3,924 Non-U.S. securities 2,637   2,981   —   —   5,618 Corporate/Agency bonds —   1,358   92   —   1,450 Other taxable securities 20   8,180   3,928   —   12,128 Tax-exempt securities —   3,072   1,061   —   4,133 Total AFS debt securities 24,171   257,644   5,091   —   286,906 Other debt securities carried at fair value:                   U.S. Treasury securities and agency securities 491   —   —   —   491 Mortgage-backed securities:                   Agency —   13,073   —   —   13,073 Agency-collateralized mortgage obligations —   929   —   —   929 Non-U.S. securities 9,151   300   —   —   9,451 Total other debt securities carried at fair value 9,642   14,302   —   —   23,944 Loans and leases —   6,715   2,287   —   9,002 Mortgage servicing rights —   —   5,716   —   5,716 Loans held-for-sale —   8,926   2,733   —   11,659 Other assets 18,535   4,826   3,129   —   26,490 Total assets $ 171,690   $ 1,865,352   $ 36,588   $ (1,329,971 )   $ 743,659 Liabilities                   Interest-bearing deposits in U.S. offices $ —   $ 2,262   $ —   $ —   $ 2,262 Federal funds purchased and securities loaned or sold under agreements to repurchase —   42,639   —   —   42,639 Trading account liabilities:                   U.S. government and agency securities 22,351   1,079   —   —   23,430 Equity securities 19,852   2,640   —   —   22,492 Non-U.S. sovereign debt 18,875   1,369   —   —   20,244 Corporate securities and other 487   6,870   64   —   7,421 Total trading account liabilities 61,565   11,958   64   —   73,587 Derivative liabilities (3) 2,859   1,355,309   6,605   (1,318,757 )   46,016 Short-term borrowings —   4,074   —   —   4,074 Accrued expenses and other liabilities 15,457   1,122   15   —   16,594 Long-term debt —   46,860   2,301   —   49,161 Total liabilities $ 79,881   $ 1,464,224   $ 8,985   $ (1,318,757 )   $ 234,333 (1)  During 2012, $2.0 billion and $350 million of assets and liabilities were transferred from Level 1 to Level 2, and $785 million and $40 million of assets and liabilities were transferred from Level 2 to Level 1. Of the asset transfers from Level 1 to Level 2, $940 million was due to a restriction that became effective for a private equity investment during 2012, while $535 million of the transfers from Level 2 to Level 1 was due to the lapse of this restriction during 2012. The remaining transfers were the result of additional information associated with certain equities, derivative contracts and private equity investments. (2)  Amounts represent the impact of legally enforceable master netting agreements and also cash collateral held or placed with the same counterparties. (3)  For further disaggregation of derivative assets and liabilities, see Note 3 – Derivatives.
Level 3 Total Realized and Unrealized Gains (Losses) Included in Earnings	Level 3 – Fair Value Measurements (1)   Three Months Ended March 31, 2012         Gross       (Dollars in millions) Balance January 1 2012 Gains (Losses) in Earnings Gains (Losses) in OCI Purchases Sales Issuances Settlements Gross Transfers into Level 3 Gross Transfers out of Level 3 Balance March 31 2012 Trading account assets:                     Corporate securities, trading loans and other $ 6,880 $ 93 $ — $ 675 $ (1,065 ) $ — $ (189 ) $ 59 $ (452 ) $ 6,001 Equity securities 544 15 — 79 (109 ) — (10 ) 8 (2 ) 525 Non-U.S. sovereign debt 342 24 — 273 (81 ) — — — (12 ) 546 Mortgage trading loans and ABS 3,689 99 — 184 (455 ) — (89 ) 742 (158 ) 4,012 Total trading account assets 11,455 231 — 1,211 (1,710 ) — (288 ) 809 (624 ) 11,084 Net derivative assets (2) 5,866 (837 ) — 359 (321 ) — (634 ) 106 (352 ) 4,187 AFS debt securities:                     Mortgage-backed securities:                     Agency 37 — — — — — (4 ) — — 33 Non-agency residential 860 (69 ) 19 — (293 ) — — — (488 ) 29 Non-agency commercial 40 — — — — — (2 ) — — 38 Corporate/Agency bonds 162 (2 ) — (2 ) — — — — (27 ) 131 Other taxable securities 4,265 7 17 362 — — (418 ) — (58 ) 4,175 Tax-exempt securities 2,648 26 18 — (35 ) — (762 ) — — 1,895 Total AFS debt securities 8,012 (38 ) 54 360 (328 ) — (1,186 ) — (573 ) 6,301 Loans and leases (3, 4) 2,744 164 — — — — (117 ) — (9 ) 2,782 Mortgage servicing rights (4) 7,378 655 — — — 77 (521 ) — — 7,589 Loans held-for-sale (3) 3,387 169 — 4 — — (97 ) 31 (632 ) 2,862 Other assets (5) 4,235 (32 ) — 43 (581 ) — (167 ) — (11 ) 3,487 Trading account liabilities – Corporate securities and other (114 ) — — 48 (27 ) — — (65 ) 34 (124 ) Accrued expenses and other liabilities (3) (14 ) 3 — 5 — — — — 3 (3 ) Long-term debt (3) (2,943 ) (241 ) — 76 (33 ) (65 ) 433 (532 ) 805 (2,500 ) (1)  Assets (liabilities). For assets, increase / (decrease) to Level 3 and for liabilities, (increase) / decrease to Level 3. (2)  Net derivatives include derivative assets of $11.3 billion and derivative liabilities of $7.1 billion. (3)  Amounts represent instruments that are accounted for under the fair value option. (4)  Issuances represent loan originations and mortgage servicing rights retained following securitizations or whole loan sales. (5)  Other assets is primarily comprised of net monoline exposure to a single counterparty and private equity investments. The following tables present a reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the three months ended March 31, 2013 and 2012, including net realized and unrealized gains (losses) included in earnings and accumulated OCI. Level 3 – Fair Value Measurements (1)   Three Months Ended March 31, 2013         Gross       (Dollars in millions) Balance January 1 2013 Gains (Losses) in Earnings Gains (Losses) in OCI Purchases Sales Issuances Settlements Gross Transfers into Level 3 Gross Transfers out of Level 3 Balance March 31 2013 Trading account assets:                     Corporate securities, trading loans and other $ 3,726 $ 88 $ — $ 805 $ (966 ) $ — $ (140 ) $ 218 $ (124 ) $ 3,607 Equity securities 545 42 — 29 (109 ) — — 8 (18 ) 497 Non-U.S. sovereign debt 353 51 — 15 (1 ) — — — (1 ) 417 Mortgage trading loans and ABS 4,935 162 — 653 (643 ) — (631 ) 5 (1 ) 4,480 Total trading account assets 9,559 343 — 1,502 (1,719 ) — (771 ) 231 (144 ) 9,001 Net derivative assets (2) 1,468 293 — 179 (466 ) — (660 ) 52 197 1,063 AFS debt securities:                     Non-agency commercial MBS 10 — — — — — — — — 10 Non-U.S. securities — — — 1 — — — — — 1 Corporate/Agency bonds 92 — 4 — — — — — — 96 Other taxable securities 3,928 — 2 243 — — (128 ) — — 4,045 Tax-exempt securities 1,061 1 3 — — — (24 ) — — 1,041 Total AFS debt securities 5,091 1 9 244 — — (152 ) — — 5,193 Loans and leases (3, 4) 2,287 51 — 71 — 5 (41 ) — (10 ) 2,363 Mortgage servicing rights (4) 5,716 434 — — (183 ) 123 (314 ) — — 5,776 Loans held-for-sale (3) 2,733 (39 ) — — (210 ) — (101 ) 22 — 2,405 Other assets (5) 3,129 (448 ) — 17 (27 ) — (42 ) — — 2,629 Trading account liabilities – Corporate securities and other (64 ) — — 7 (14 ) — — (8 ) 21 (58 ) Accrued expenses and other liabilities (3) (15 ) 29 — — — (586 ) 116 — 1 (455 ) Long-term debt (3) (2,301 ) 11 — 89 (4 ) (36 ) 60 (381 ) 207 (2,355 ) (1)  Assets (liabilities). For assets, increase / (decrease) to Level 3 and for liabilities, (increase) / decrease to Level 3. (2)  Net derivatives include derivative assets of $8.0 billion and derivative liabilities of $6.9 billion. (3)  Amounts represent instruments that are accounted for under the fair value option. (4)  Issuances represent loan originations and mortgage servicing rights retained following securitizations or whole loan sales. (5)  Other assets is primarily comprised of net monoline exposure to a single counterparty and private equity investments.
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at Reporting Date	The following tables summarize changes in unrealized gains (losses) recorded in earnings during the three months ended March 31, 2013 and 2012 for Level 3 assets and liabilities that were still held at March 31, 2013 and 2012. These amounts include changes in fair value on loans, LHFS, loan commitments and structured liabilities that are accounted for under the fair value option. Level 3 – Changes in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at Reporting Date   Three Months Ended March 31, 2013 (Dollars in millions) Equity Investment Income (Loss)   Trading Account Profits (Losses)   Mortgage Banking Income (Loss) (1)   Other Income (Loss)   Total Trading account assets:                   Corporate securities, trading loans and other $ —   $ 48   $ —   $ —   $ 48 Equity securities —   33   —   —   33 Non-U.S. sovereign debt —   51   —   —   51 Mortgage trading loans and ABS —   89   —   —   89 Total trading account assets —   221   —   —   221 Net derivative assets —   (169 )   246   —   77 Loans and leases (2) —   —   —   43   43 Mortgage servicing rights —   —   336   —   336 Loans held-for-sale (2) —   —   10   (52 )   (42 ) Other assets (15 )   —   12   (447 )   (450 ) Accrued expenses and other liabilities (2) —   —   25   —   25 Long-term debt (2) —   21   —   (11 )   10 Total $ (15 )   $ 73   $ 629   $ (467 )   $ 220                       Three Months Ended March 31, 2012 Trading account assets:                   Corporate securities, trading loans and other $ —   $ 56   $ —   $ —   $ 56 Equity securities —   11   —   —   11 Non-U.S. sovereign debt —   13   —   —   13 Mortgage trading loans and ABS —   53   —   —   53 Total trading account assets —   133   —   —   133 Net derivative assets —   (1,314 )   300   —   (1,014 ) Loans and leases (2) —   —   —   163   163 Mortgage servicing rights —   —   470   —   470 Loans held-for-sale (2) —   —   51   23   74 Other assets (19 )   —   6   (34 )   (47 ) Accrued expenses and other liabilities (2) —   —   —   3   3 Long-term debt (2) —   (129 )   —   (102 )   (231 ) Total $ (19 )   $ (1,310 )   $ 827   $ 53   $ (449 ) (1)  Mortgage banking income does not reflect the impact of Level 1 and Level 2 hedges on MSRs. (2)  Amounts represent instruments that are accounted for under the fair value option.
Fair Value Inputs, Assets and Liabilities, Quantitative Information	The following tables present information about significant unobservable inputs related to the Corporation's material categories of Level 3 financial assets and liabilities at March 31, 2013 and December 31, 2012. Quantitative Information about Level 3 Fair Value Measurements at March 31, 2013   (Dollars in millions)     Inputs Financial Instrument Fair Value Valuation Technique Significant Unobservable Inputs Ranges of Inputs Weighted Average Loans and Securities (1)           Instruments backed by residential real estate assets $ 3,676 Discounted cash flow, Market comparables Yield 0% to 25% 6 % Trading account assets – Mortgage trading loans and ABS 365 Prepayment speed 1% to 35% CPR 10 % Loans and leases 906 Default rate 0% to 35% CDR 5 % Loans held-for-sale 2,405 Loss severity 4% to 85% 41 % Instruments backed by commercial real estate assets $ 1,454 Discounted cash flow Yield 5% n/a Other assets 1,454 Loss severity 51% to 100% 80 % Commercial loans, debt securities and other $ 11,257 Discounted cash flow, Market comparables Yield 0% to 33% 4 % Trading account assets – Corporate securities, trading loans and other 2,471 Enterprise value/EBITDA multiple 1x to 17x 6 x Trading account assets – Mortgage trading loans and ABS 4,115 Prepayment speed 5% to 40% 19 % AFS debt securities – Other taxable securities 3,214 Default rate 1% to 5% 4 % Loans and leases 1,457 Loss severity 25% to 40% 36 % Auction rate securities $ 3,008 Discounted cash flow, Market comparables Discount rate 4% to 5% 5 % Trading account assets – Corporate securities, trading loans and other 1,136 Projected tender price/Re-financing level 50% to 100% 93 % AFS debt securities – Other taxable securities 831     AFS debt securities – Tax-exempt securities 1,041       Structured liabilities           Long-term debt $ (2,355 ) Industry standard derivative pricing (2) Equity correlation 30% to 97% 73 %     Long-dated volatilities 15% to 115% 26 %           Net derivatives assets           Credit derivatives $ 1,839 Discounted cash flow, Stochastic recovery correlation model Yield 3% to 30% 16 %     Credit spreads 37 bps to 346 bps 200 bps     Upfront points 12 points to 100 points 71 points     Spread to index -1,657 bps to 1,988 bps 400 bps     Credit correlation 21% to 75% 39 %     Prepayment speed 4% to 30% CPR 9 %     Default rate 1% to 5% CDR 3 %     Loss severity 27% to 50% 37 % Equity derivatives $ (1,215 ) Industry standard derivative pricing (2) Equity correlation 30% to 97% 73 %     Long-dated volatilities 15% to 115% 26 %           Commodity derivatives $ (4 ) Discounted cash flow Natural gas forward price $3/MMBtu to $12/MMBtu $7/MMBtu Interest rate derivatives $ 443 Industry standard derivative pricing (3) Correlation (IR/IR) 19% to 99% 69 %     Correlation (FX/IR) -65% to 50% 7 %     Long-dated inflation rates 2% to 3% 2 %     Long-dated inflation volatilities 0% to 2% 1 % Total net derivative assets $ 1,063         (1)  The categories are aggregated based upon product type which differs from financial statement classification. The following is a reconciliation to the line items in the table on page 214: Trading account assets – Corporate securities, trading loans and other of $3.6 billion, Trading account assets – Mortgage trading loans and ABS of $4.5 billion, AFS debt securities – Other taxable securities of $4.0 billion, AFS debt securities – Tax-exempt securities of $1.0 billion, Loans and leases of $2.4 billion, LHFS of $2.4 billion and Other assets of $1.5 billion. (2)  Includes models such as Monte Carlo simulation and Black-Scholes. (3)  Includes models such as Monte Carlo simulation, Black-Scholes and other methods that model the joint dynamics of interest, inflation and foreign exchange rates. n/a = not applicable CPR = Constant Prepayment Rate CDR = Constant Default Rate EBITDA = Earnings before interest, taxes, depreciation and amortization MMBtu = Million British thermal units IR = Interest Rate FX = Foreign Exchange Quantitative Information about Level 3 Fair Value Measurements for Loans, Securities and Structured Liabilities at December 31, 2012   (Dollars in millions)     Inputs Financial Instrument Fair Value Valuation Technique Significant Unobservable Inputs Ranges of Inputs Weighted Average Loans and Securities (1)           Instruments backed by residential real estate assets $ 4,478 Discounted cash flow, Market comparables Yield 2% to 25% 6 % Trading account assets – Mortgage trading loans and ABS 459 Prepayment speed 1% to 30% CPR 10 % Loans and leases 1,286 Default rate 0% to 44% CDR 6 % Loans held-for-sale 2,733 Loss severity 6% to 85% 43 % Instruments backed by commercial real estate assets $ 1,910 Discounted cash flow Yield 5% n/a Other assets 1,910 Loss severity 51% to 100% 88 % Commercial loans, debt securities and other $ 10,778 Discounted cash flow, Market comparables Yield 0% to 25% 4 % Trading account assets – Corporate securities, trading loans and other 2,289 Enterprise value/EBITDA multiple 2x to 11x 5x Trading account assets – Mortgage trading loans and ABS 4,476 Prepayment speed 5% to 30% 20 % AFS debt securities – Other taxable securities 3,012 Default rate 1% to 5% 4 % Loans and leases 1,001 Loss severity 25% to 40% 35 % Auction rate securities $ 3,414 Discounted cash flow, Market comparables Discount rate 4% to 5% 4 % Trading account assets – Corporate securities, trading loans and other 1,437 Projected tender price/Re-financing level 50% to 100% 92 % AFS debt securities – Other taxable securities 916     AFS debt securities – Tax-exempt securities 1,061       Structured liabilities           Long-term debt (2) $ (2,301 ) Industry standard derivative pricing (3) Equity correlation 30% to 97% n/m     Long-dated volatilities 20% to 70% n/m           Quantitative Information about Level 3 Fair Value Measurements for Net Derivative Assets at December 31, 2012 (Dollars in millions)     Inputs Financial Instrument Fair Value Valuation Technique Significant Unobservable Inputs Ranges of Inputs Net derivatives assets         Credit derivatives $ 2,327 Discounted cash flow, Stochastic recovery correlation model Yield 2% to 25%     Credit spreads 58 bps to 615 bps     Upfront points 25 points to 99 points     Spread to index -2,080 bps to 1,972 bps     Credit correlation 19% to 75%     Prepayment speed 3% to 30% CPR     Default rate 0% to 8% CDR     Loss severity 25% to 42% Equity derivatives $ (1,295 ) Industry standard derivative pricing (3) Equity correlation 30% to 97%     Long-dated volatilities 20% to 70%         Commodity derivatives $ (5 ) Discounted cash flow Natural gas forward price $3/MMBtu to $12/MMBtu Interest rate derivatives $ 441 Industry standard derivative pricing (4) Correlation (IR/IR) 15% to 99%     Correlation (FX/IR) -65% to 50%     Long-dated inflation rates 2% to 3%     Long-dated inflation volatilities 0% to 1%     Long-dated volatilities (FX) 5% to 36%     Long-dated swap rates 8% to 10% Total net derivative assets $ 1,468       (1)  The categories are aggregated based upon product type which differs from financial statement classification. The following is a reconciliation to the line items in the table on page 215: Trading account assets – Corporate securities, trading loans and other of $3.7 billion, Trading account assets – Mortgage trading loans and ABS of $4.9 billion, AFS debt securities – Other taxable securities of $3.9 billion, AFS debt securities – Tax-exempt securities of $1.1 billion, Loans and leases of $2.3 billion, LHFS of $2.7 billion and Other assets of $1.9 billion. (2)  For additional information on the ranges of inputs for equity correlation and long-dated volatilities, see the qualitative equity derivatives discussion on page 220. (3)  Includes models such as Monte Carlo simulation and Black-Scholes. (4)  Includes models such as Monte Carlo simulation, Black-Scholes and other methods that model the joint dynamics of interest, inflation and foreign exchange rates. n/a = not applicable n/m = not meaningful CPR = Constant Prepayment Rate CDR = Constant Default Rate EBITDA = Earnings before interest, taxes, depreciation and amortization MMBtu = Million British thermal units IR = Interest Rate FX = Foreign Exchange
Assets and Liabilities Measured at Fair Value on Nonrecurring Basis	Assets Measured at Fair Value on a Nonrecurring Basis   March 31, 2013   Three Months Ended March 31, 2013 (Dollars in millions) Level 2   Level 3   Gains (Losses) Assets           Loans held-for-sale $ 3,902   $ 795   $ (96 ) Loans and leases (1) 20   3,619   (640 ) Foreclosed properties (2) 48   1,981   (19 ) Other assets 65   12   (6 )               March 31, 2012   Three Months Ended March 31, 2012 (Dollars in millions) Level 2   Level 3   Gains (Losses) Assets           Loans held-for-sale $ 3,465   $ 857   $ 60 Loans and leases (1) 21   5,813   (1,497 ) Foreclosed properties (2) —   2,149   (67 ) Other assets —   14   — (1)  Losses represent charge-offs on real estate-secured loans. (2)  Amounts are included in other assets on the Consolidated Balance Sheet and represent fair value and related losses on foreclosed properties that were written down subsequent to their initial classification as foreclosed properties.
Fair Value Inputs, Assets, Quantitative Information	The table below presents information about significant unobservable inputs related to the Corporation's nonrecurring Level 3 financial assets and liabilities at March 31, 2013 and December 31, 2012. Quantitative Information about Nonrecurring Level 3 Fair Value Measurements at March 31, 2013   (Dollars in millions)     Inputs Financial Instrument Fair Value Valuation Technique Significant Unobservable Inputs Ranges of Inputs Weighted Average Instruments backed by residential real estate assets $ 4,312 Discounted cash flow, Market comparables Yield 4% to 5% 4 % Loans held-for-sale 693 Prepayment speed 3% to 26% 14 % Loans and leases 3,619 Default rate 0% to 51% 7 %     Loss severity 5% to 63% 44 %     OREO discount 0% to 28% 15 %     Cost to sell 8% n/a Instruments backed by commercial real estate assets $ 102 Discounted cash flow Yield 5% to 11% 9 % Loans held-for-sale 102 Loss severity 31% to 93% 81 % Quantitative Information about Nonrecurring Level 3 Fair Value Measurements at December 31, 2012   Instruments backed by residential real estate assets $ 9,932 Discounted cash flow, Market comparables Yield 3% to 5% 3 % Loans held-for-sale 748 Prepayment speed 3% to 30% 15 % Loans and leases 9,184 Default rate 0% to 55% 7 %     Loss severity 6% to 66% 48 %     OREO discount 0% to 28% 15 %     Cost to sell 8% n/a Instruments backed by commercial real estate assets $ 388 Discounted cash flow Yield 4% to 13% 6 % Loans held-for-sale 388 Loss severity 24% to 88% 53 % n/a = not applicable
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Level 3 Total Realized and Unrealized Gains (Losses) Included in Earnings	Level 3 – Total Realized and Unrealized Gains (Losses) Included in Earnings   Three Months Ended March 31, 2013 (Dollars in millions) Equity Investment Income (Loss)   Trading Account Profits (Losses)   Mortgage Banking Income (Loss) (1)   Other Income (Loss)   Total Trading account assets:                   Corporate securities, trading loans and other $ —   $ 88   $ —   $ —   $ 88 Equity securities —   42   —   —   42 Non-U.S. sovereign debt —   51   —   —   51 Mortgage trading loans and ABS —   162   —   —   162 Total trading account assets —   343   —   —   343 Net derivative assets —   (114 )   407   —   293 AFS debt securities – Tax-exempt securities —   —   —   1   1 Loans and leases (2) —   —   —   51   51 Mortgage servicing rights —   —   434   —   434 Loans held-for-sale (2) —   —   4   (43 )   (39 ) Other assets 2   —   (3 )   (447 )   (448 ) Accrued expenses and other liabilities (2) —   —   29   —   29 Long-term debt (2) —   22   —   (11 )   11 Total $ 2   $ 251   $ 871   $ (449 )   $ 675                       Three Months Ended March 31, 2012 Trading account assets:                   Corporate securities, trading loans and other $ —   $ 93   $ —   $ —   $ 93 Equity securities —   15   —   —   15 Non-U.S. sovereign debt —   24   —   —   24 Mortgage trading loans and ABS —   99   —   —   99 Total trading account assets —   231   —   —   231 Net derivative assets —   (1,373 )   536   —   (837 ) AFS debt securities:                   Non-agency residential MBS —   —   —   (69 )   (69 ) Corporate/Agency bonds —   —   —   (2 )   (2 ) Other taxable securities —   —   —   7   7 Tax-exempt securities —   —   —   26   26 Total AFS debt securities —   —   —   (38 )   (38 ) Loans and leases (2) —   —   —   164   164 Mortgage servicing rights —   —   655   —   655 Loans held-for-sale (2) —   —   90   79   169 Other assets 10   —   (8 )   (34 )   (32 ) Accrued expenses and other liabilities (2) —   —   —   3   3 Long-term debt (2) —   (139 )   —   (102 )   (241 ) Total $ 10   $ (1,281 )   $ 1,273   $ 72   $ 74 (1)  Mortgage banking income does not reflect the impact of Level 1 and Level 2 hedges on MSRs. (2)  Amounts represent instruments that are accounted for under the fair value option.