v2.4.0.6
Variable Interest Entities and Securitization Activities (Non-Consolidated VIEs) (Details) (Non-Consolidated VIEs, USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Mortgage and Asset-Backed Securities
    
Carrying value of exposure to loss - Assets $ 210,595 [1] $ 231,110 [2]
Maximum exposure to loss 18,220 16,780
Carrying value of exposure to loss - Liabilities 12 13
Mortgage and Asset-Backed Securities | Carrying Value of Exposure to Loss
    
Carrying value of exposure to loss - Assets 17,906 16,570
Mortgage and Asset-Backed Securities | Debt and Equity Interests
    
Maximum exposure to loss 17,797 [3] 16,469 [4]
Mortgage and Asset-Backed Securities | Debt and Equity Interests | Carrying Value of Exposure to Loss
    
Carrying value of exposure to loss - Assets 17,797 [3] 16,469 [4]
Mortgage and Asset-Backed Securities | Net Derivative and Other Contracts
    
Maximum exposure to loss 108 103
Carrying value of exposure to loss - Liabilities 12 13
Mortgage and Asset-Backed Securities | Net Derivative and Other Contracts | Carrying Value of Exposure to Loss
    
Carrying value of exposure to loss - Assets 109 101
Mortgage and Asset-Backed Securities | Commitments, Guarantees and Other
    
Maximum exposure to loss 315 208
Carrying value of exposure to loss - Liabilities 0 0
Mortgage and Asset-Backed Securities | Residential Mortgage Loans
    
Carrying value of exposure to loss - Assets 600 600
Mortgage and Asset-Backed Securities | Commercial Mortgage Loans
    
Carrying value of exposure to loss - Assets 600 1,100
Mortgage and Asset-Backed Securities | Other Consumer and Commercial Loans
    
Carrying value of exposure to loss - Assets 3,100 1,300
Mortgage and Asset-Backed Securities | U.S. Agency Collateralized Mortgage Obligations [Member]
    
Carrying value of exposure to loss - Assets 13,500 13,500
Mortgage and Asset-Backed Securities | Variable Interest Entity Assets | Residential Mortgage Loans
    
Carrying value of exposure to loss - Assets 10,500 9,100
Mortgage and Asset-Backed Securities | Variable Interest Entity Assets | Commercial Mortgage Loans
    
Carrying value of exposure to loss - Assets 58,600 81,700
Mortgage and Asset-Backed Securities | Variable Interest Entity Assets | Other Consumer and Commercial Loans
    
Carrying value of exposure to loss - Assets 37,800 18,700
Mortgage and Asset-Backed Securities | Variable Interest Entity Assets | U.S. Agency Collateralized Mortgage Obligations [Member]
    
Carrying value of exposure to loss - Assets 103,700 121,600
Collateralized Debt Obligations
    
Carrying value of exposure to loss - Assets 20,491 [1] 7,593 [2]
Maximum exposure to loss 1,165 1,334
Carrying value of exposure to loss - Liabilities 2 159
Collateralized Debt Obligations | Carrying Value of Exposure to Loss
    
Carrying value of exposure to loss - Assets 1,120 1,148
Collateralized Debt Obligations | Debt and Equity Interests
    
Maximum exposure to loss 1,118 [3] 491 [4]
Collateralized Debt Obligations | Debt and Equity Interests | Carrying Value of Exposure to Loss
    
Carrying value of exposure to loss - Assets 1,118 [3] 491 [4]
Collateralized Debt Obligations | Net Derivative and Other Contracts
    
Maximum exposure to loss 47 843
Carrying value of exposure to loss - Liabilities 2 159
Collateralized Debt Obligations | Net Derivative and Other Contracts | Carrying Value of Exposure to Loss
    
Carrying value of exposure to loss - Assets 2 657
Collateralized Debt Obligations | Commitments, Guarantees and Other
    
Maximum exposure to loss 0 0
Carrying value of exposure to loss - Liabilities 0 0
Municipal Tender Option Bonds
    
Carrying value of exposure to loss - Assets 6,386 [1] 6,833 [2]
Maximum exposure to loss 4,064 4,342
Carrying value of exposure to loss - Liabilities 0 0
Municipal Tender Option Bonds | Carrying Value of Exposure to Loss
    
Carrying value of exposure to loss - Assets 365 225
Municipal Tender Option Bonds | Debt and Equity Interests
    
Maximum exposure to loss 359 [3] 201 [4]
Municipal Tender Option Bonds | Debt and Equity Interests | Carrying Value of Exposure to Loss
    
Carrying value of exposure to loss - Assets 359 [3] 201 [4]
Municipal Tender Option Bonds | Net Derivative and Other Contracts
    
Maximum exposure to loss 3,705 4,141
Carrying value of exposure to loss - Liabilities 0 0
Municipal Tender Option Bonds | Net Derivative and Other Contracts | Carrying Value of Exposure to Loss
    
Carrying value of exposure to loss - Assets 6 24
Municipal Tender Option Bonds | Commitments, Guarantees and Other
    
Maximum exposure to loss 0 0
Carrying value of exposure to loss - Liabilities 0 0
Other Structured Financings
    
Carrying value of exposure to loss - Assets 1,865 [1] 1,944 [2]
Maximum exposure to loss 1,673 1,782
Carrying value of exposure to loss - Liabilities 12 14
Other Structured Financings | Carrying Value of Exposure to Loss
    
Carrying value of exposure to loss - Assets 538 640
Other Structured Financings | Debt and Equity Interests
    
Maximum exposure to loss 896 [3] 978 [4]
Other Structured Financings | Debt and Equity Interests | Carrying Value of Exposure to Loss
    
Carrying value of exposure to loss - Assets 538 [3] 640 [4]
Other Structured Financings | Net Derivative and Other Contracts
    
Maximum exposure to loss 0 0
Carrying value of exposure to loss - Liabilities 0 0
Other Structured Financings | Net Derivative and Other Contracts | Carrying Value of Exposure to Loss
    
Carrying value of exposure to loss - Assets 0 0
Other Structured Financings | Commitments, Guarantees and Other
    
Maximum exposure to loss 777 804
Carrying value of exposure to loss - Liabilities 12 14
Other
    
Carrying value of exposure to loss - Assets 17,287 [1] 20,997 [2]
Maximum exposure to loss 4,382 4,183
Carrying value of exposure to loss - Liabilities 281 290
Other | Carrying Value of Exposure to Loss
    
Carrying value of exposure to loss - Assets 2,815 2,751
Other | Debt and Equity Interests
    
Maximum exposure to loss 2,512 [3] 2,413 [4]
Other | Debt and Equity Interests | Carrying Value of Exposure to Loss
    
Carrying value of exposure to loss - Assets 2,507 [3] 2,413 [4]
Other | Net Derivative and Other Contracts
    
Maximum exposure to loss 863 1,209
Carrying value of exposure to loss - Liabilities 122 114
Other | Net Derivative and Other Contracts | Carrying Value of Exposure to Loss
    
Carrying value of exposure to loss - Assets 308 338
Other | Commitments, Guarantees and Other
    
Maximum exposure to loss 1,007 561
Carrying value of exposure to loss - Liabilities $ 159 $ 176
[1] Mortgage and asset-backed securitizations include VIE assets as follows: $10.5 billion of residential mortgages; $58.6 billion of commercial mortgages; $103.7 billion of U.S. agency collateralized mortgage obligations; and $37.8 billion of other consumer or commercial loans.
[2] Mortgage and asset-backed securitizations include VIE assets as follows: $9.1 billion of residential mortgages; $81.7 billion of commercial mortgages; $121.6 billion of U.S. agency collateralized mortgage obligations; and $18.7 billion of other consumer or commercial loans. Prior period amounts were adjusted to conform to the current period’s presentation.
[3] Mortgage and asset-backed securitizations include VIE debt and equity interests as follows: $0.6 billion of residential mortgages; $0.6 billion of commercial mortgages; $13.5 billion of U.S. agency collateralized mortgage obligations; and $3.1 billion of other consumer or commercial loans.
[4] Mortgage and asset-backed securitizations include VIE debt and equity interests as follows: $0.6 billion of residential mortgages; $1.1 billion of commercial mortgages; $13.5 billion of U.S. agency collateralized mortgage obligations; and $1.3 billion of other consumer or commercial loans. Prior period amounts were adjusted to conform to the current period’s presentation.