|
Securitizations and Variable Interest Entities, Significant Continuing Involvement - Unconsolidated VIEs (Details) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2013
|
Dec. 31, 2012
|
|---|---|---|
| Variable Interest Entity [Line Items] | ||
| Total VIE assets | $ 1,564,376 | $ 1,553,824 |
|
Conforming Residential Mortgage Backed Securities [Member]
|
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| Variable Interest Entity [Line Items] | ||
| Total VIE assets | 1,274,961 | 1,268,494 |
|
Other/Nonconforming Residential Mortgage Backed Securities [Member]
|
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| Variable Interest Entity [Line Items] | ||
| Total VIE assets | 46,968 | 49,794 |
|
Commercial mortgage securitizations [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Total VIE assets | 174,917 | 168,126 |
|
Collateralized Debt Obligations Debt Securities [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Total VIE assets | 6,737 | 6,940 |
|
Collateralized Debt Obligations Loans [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Total VIE assets | 8,102 | 8,155 |
|
Asset-based finance structures [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Total VIE assets | 11,623 | 10,404 |
|
Tax Credit Structures [Member]
|
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| Variable Interest Entity [Line Items] | ||
| Total VIE assets | 21,047 | 20,098 |
|
Collateralized loan obligations [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Total VIE assets | 5,618 | 6,641 |
|
Investment funds [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Total VIE assets | 4,409 | 4,771 |
|
Other securitizations and transactions [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Total VIE assets | 9,994 | 10,401 |
|
Debt and equity interests [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 36,531 | 35,664 |
| Maximum exposure to loss | 36,531 | 35,664 |
|
Debt and equity interests [Member] | Conforming Residential Mortgage Backed Securities [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 3,712 | 3,620 |
| Maximum exposure to loss | 3,712 | 3,620 |
|
Debt and equity interests [Member] | Other/Nonconforming Residential Mortgage Backed Securities [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 2,119 | 2,188 |
| Maximum exposure to loss | 2,119 | 2,188 |
|
Debt and equity interests [Member] | Commercial mortgage securitizations [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 7,809 | 7,081 |
| Maximum exposure to loss | 7,809 | 7,081 |
|
Debt and equity interests [Member] | Collateralized Debt Obligations Debt Securities [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 12 | 13 |
| Maximum exposure to loss | 12 | 13 |
|
Debt and equity interests [Member] | Collateralized Debt Obligations Loans [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 7,920 | 7,962 |
| Maximum exposure to loss | 7,920 | 7,962 |
|
Debt and equity interests [Member] | Asset-based finance structures [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 7,437 | 7,155 |
| Maximum exposure to loss | 7,437 | 7,155 |
|
Debt and equity interests [Member] | Tax Credit Structures [Member]
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| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 5,256 | 5,180 |
| Maximum exposure to loss | 5,256 | 5,180 |
|
Debt and equity interests [Member] | Collateralized loan obligations [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 1,233 | 1,439 |
| Maximum exposure to loss | 1,233 | 1,439 |
|
Debt and equity interests [Member] | Investment funds [Member]
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||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 53 | 49 |
| Maximum exposure to loss | 53 | 49 |
|
Debt and equity interests [Member] | Other securitizations and transactions [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 980 | 977 |
| Maximum exposure to loss | 980 | 977 |
|
Servicing assets [Member]
|
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| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 11,688 | 11,114 |
| Maximum exposure to loss | 11,688 | 11,114 |
|
Servicing assets [Member] | Conforming Residential Mortgage Backed Securities [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 10,970 | 10,336 |
| Maximum exposure to loss | 10,970 | 10,336 |
|
Servicing assets [Member] | Other/Nonconforming Residential Mortgage Backed Securities [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 258 | 284 |
| Maximum exposure to loss | 258 | 284 |
|
Servicing assets [Member] | Commercial mortgage securitizations [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 433 | 466 |
| Maximum exposure to loss | 433 | 466 |
|
Servicing assets [Member] | Collateralized Debt Obligations Debt Securities [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 0 | 0 |
| Maximum exposure to loss | 0 | 0 |
|
Servicing assets [Member] | Collateralized Debt Obligations Loans [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 0 | 0 |
| Maximum exposure to loss | 0 | 0 |
|
Servicing assets [Member] | Asset-based finance structures [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 0 | 0 |
| Maximum exposure to loss | 0 | 0 |
|
Servicing assets [Member] | Tax Credit Structures [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 0 | 0 |
| Maximum exposure to loss | 0 | 0 |
|
Servicing assets [Member] | Collateralized loan obligations [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 0 | 0 |
| Maximum exposure to loss | 0 | 0 |
|
Servicing assets [Member] | Investment funds [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 0 | 0 |
| Maximum exposure to loss | 0 | 0 |
|
Servicing assets [Member] | Other securitizations and transactions [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 27 | 28 |
| Maximum exposure to loss | 27 | 28 |
|
Variable Interest Entity Derivatives [Member]
|
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| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 660 | 786 |
| Maximum exposure to loss | 1,156 | 1,340 |
|
Variable Interest Entity Derivatives [Member] | Conforming Residential Mortgage Backed Securities [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 0 | 0 |
| Maximum exposure to loss | 0 | 0 |
|
Variable Interest Entity Derivatives [Member] | Other/Nonconforming Residential Mortgage Backed Securities [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 0 | 0 |
| Maximum exposure to loss | 0 | 0 |
|
Variable Interest Entity Derivatives [Member] | Commercial mortgage securitizations [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 373 | 404 |
| Maximum exposure to loss | 426 | 446 |
|
Variable Interest Entity Derivatives [Member] | Collateralized Debt Obligations Debt Securities [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 422 | 471 |
| Maximum exposure to loss | 422 | 471 |
|
Variable Interest Entity Derivatives [Member] | Collateralized Debt Obligations Loans [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 0 | 0 |
| Maximum exposure to loss | 0 | 0 |
|
Variable Interest Entity Derivatives [Member] | Asset-based finance structures [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | (94) | (104) |
| Maximum exposure to loss | 94 | 104 |
|
Variable Interest Entity Derivatives [Member] | Tax Credit Structures [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 0 | 0 |
| Maximum exposure to loss | 0 | 0 |
|
Variable Interest Entity Derivatives [Member] | Collateralized loan obligations [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 0 | 1 |
| Maximum exposure to loss | 0 | 1 |
|
Variable Interest Entity Derivatives [Member] | Investment funds [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 0 | 0 |
| Maximum exposure to loss | 0 | 0 |
|
Variable Interest Entity Derivatives [Member] | Other securitizations and transactions [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | (41) | 14 |
| Maximum exposure to loss | 214 | 318 |
|
Other commitments and guarantees [Member]
|
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| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | (3,765) | (3,255) |
| Maximum exposure to loss | 8,714 | 8,179 |
|
Other commitments and guarantees [Member] | Conforming Residential Mortgage Backed Securities [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | (1,931) | (1,690) |
| Maximum exposure to loss | 5,458 | 5,061 |
|
Other commitments and guarantees [Member] | Other/Nonconforming Residential Mortgage Backed Securities [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | (33) | (53) |
| Maximum exposure to loss | 353 | 353 |
|
Other commitments and guarantees [Member] | Commercial mortgage securitizations [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 0 | 0 |
| Maximum exposure to loss | 0 | 0 |
|
Other commitments and guarantees [Member] | Collateralized Debt Obligations Debt Securities [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | (138) | 144 |
| Maximum exposure to loss | 138 | 144 |
|
Other commitments and guarantees [Member] | Collateralized Debt Obligations Loans [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 0 | 0 |
| Maximum exposure to loss | 0 | 0 |
|
Other commitments and guarantees [Member] | Asset-based finance structures [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 0 | 0 |
| Maximum exposure to loss | 1,974 | 1,967 |
|
Other commitments and guarantees [Member] | Tax Credit Structures [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | (1,624) | (1,657) |
| Maximum exposure to loss | 387 | 247 |
|
Other commitments and guarantees [Member] | Collateralized loan obligations [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 0 | 0 |
| Maximum exposure to loss | 261 | 261 |
|
Other commitments and guarantees [Member] | Investment funds [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 0 | 0 |
| Maximum exposure to loss | 24 | 27 |
|
Other commitments and guarantees [Member] | Other securitizations and transactions [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | (39) | 1 |
| Maximum exposure to loss | 119 | 119 |
|
Net assets [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 45,114 | 44,309 |
| Maximum exposure to loss | 58,089 | 56,297 |
|
Net assets [Member] | Conforming Residential Mortgage Backed Securities [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 12,751 | 12,266 |
| Maximum exposure to loss | 20,140 | 19,017 |
|
Net assets [Member] | Other/Nonconforming Residential Mortgage Backed Securities [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 2,344 | 2,419 |
| Maximum exposure to loss | 2,730 | 2,825 |
|
Net assets [Member] | Commercial mortgage securitizations [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 8,615 | 7,951 |
| Maximum exposure to loss | 8,668 | 7,993 |
|
Net assets [Member] | Collateralized Debt Obligations Debt Securities [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 296 | 628 |
| Maximum exposure to loss | 572 | 628 |
|
Net assets [Member] | Collateralized Debt Obligations Loans [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 7,920 | 7,962 |
| Maximum exposure to loss | 7,920 | 7,962 |
|
Net assets [Member] | Asset-based finance structures [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 7,343 | 7,051 |
| Maximum exposure to loss | 9,505 | 9,226 |
|
Net assets [Member] | Tax Credit Structures [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 3,632 | 3,523 |
| Maximum exposure to loss | 5,643 | 5,427 |
|
Net assets [Member] | Collateralized loan obligations [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 1,233 | 1,440 |
| Maximum exposure to loss | 1,494 | 1,701 |
|
Net assets [Member] | Investment funds [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 53 | 49 |
| Maximum exposure to loss | 77 | 76 |
|
Net assets [Member] | Other securitizations and transactions [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| Carrying value asset (liability) | 927 | 1,020 |
| Maximum exposure to loss | $ 1,340 | $ 1,442 |