|
Securities - Other Debt Securities Carried at Fair Value (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2014
|
Dec. 31, 2013
|
Sep. 30, 2014
U.S. Treasury and agency securities
|
Dec. 31, 2013
U.S. Treasury and agency securities
|
Sep. 30, 2014
Agency
|
Dec. 31, 2013
Agency
|
Sep. 30, 2014
Agency-collateralized mortgage obligations
|
Dec. 31, 2013
Agency-collateralized mortgage obligations
|
Sep. 30, 2014
Non-agency residential
|
Dec. 31, 2013
Non-agency residential
|
Sep. 30, 2014
Commercial
|
Dec. 31, 2013
Commercial
|
Sep. 30, 2014
Non-U.S. securities
|
Dec. 31, 2013
Non-U.S. securities
|
Sep. 30, 2014
Other taxable securities, substantially all asset-backed securities
|
Dec. 31, 2013
Other taxable securities, substantially all asset-backed securities
|
Sep. 30, 2014
Other income (loss)
|
Sep. 30, 2013
Other income (loss)
|
Sep. 30, 2014
Other income (loss)
|
Sep. 30, 2013
Other income (loss)
|
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| Other Debt Securities Carried at Fair Value [Line Items] | ||||||||||||||||||||||||
| Unrealized mark-to-market net losses | $ (53) | $ 459 | $ 807 | $ (925) | ||||||||||||||||||||
| Realized net gains (losses) | 73 | (515) | 156 | (720) | ||||||||||||||||||||
| Other debt securities carried at fair value | $ 41,109 | $ 32,844 | $ 3,180 | $ 4,062 | $ 15,711 | $ 16,500 | $ 0 | $ 218 | $ 3,717 | $ 0 | $ 787 | $ 749 | $ 17,405 | [1] | $ 11,315 | [1] | $ 309 | $ 0 | ||||||
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