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Fair Values (Details) - USD ($) $ in Millions | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Investment securities: |  |
Equity securities | $ 1 | $ 1
Debt securities and other | 3,891 | 3,758
Derivatives | 1,143 | 544
Total assets | 5,035 | 4,303
Level 1 [Member] |  |
Investment securities: |  |
Equity securities | 1 | 1
Debt securities and other | 368 | 409
Derivatives | 0 | 0
Total assets | 369 | 410
Level 2 [Member] |  |
Investment securities: |  |
Equity securities | 0 | 0
Debt securities and other | 3,523 | 3,349
Derivatives | 1,143 | 544
Total assets | 4,666 | 3,893
Level 3 [Member] |  |
Investment securities: |  |
Equity securities | 0 | 0
Debt securities and other | 0 | 0
Derivatives | 0 | 0
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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