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Fair Values (Details) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Investment securities: |  |
Equity securities | $ 1 | $ 1
Debt securities and other | 3,758 | 4,430
Derivative assets | 544 | 991
Total assets | 4,303 | 5,422
Level 1 [Member] |  |
Investment securities: |  |
Equity securities | 1 | 1
Debt securities and other | 409 | 350
Derivative assets | 0 | 0
Total assets | 410 | 351
Level 2 [Member] |  |
Investment securities: |  |
Equity securities | 0 | 0
Debt securities and other | 3,349 | 4,080
Derivative assets | 545 | 991
Total assets | 3,894 | 5,071
Level 3 [Member] |  |
Investment securities: |  |
Total assets | $ 0 | $ 0

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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Includes assets not subject to a master netting arrangement. + References No definition available. + Details
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