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Fair Values (Details) - USD ($) $ in Millions | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Investment securities: |  |
Equity securities | $ 75 | $ 48
Debt securities | 8,370 | 4,599
Derivative assets | 622 | 514
Total Assets | 9,067 | 5,161
Liabilities |  |
Derivative liabilities | 193 | 214
Total Liabilities | 193 | 214
Fair Value, Inputs, Level 1 [Member] |  |
Investment securities: |  |
Equity securities | 73 | 1
Debt securities | 0 | 0
Derivative assets | 0 | 0
Total Assets | 73 | 1
Liabilities |  |
Derivative liabilities | 0 | 0
Total Liabilities | 0 | 0
Fair Value, Inputs, Level 2 [Member] |  |
Investment securities: |  |
Equity securities | 2 | 47
Debt securities | 8,370 | 4,599
Derivative assets | 622 | 514
Total Assets | 8,994 | 5,160
Liabilities |  |
Derivative liabilities | 193 | 214
Total Liabilities | 193 | 214
Fair Value, Inputs, Level 3 [Member] |  |
Investment securities: |  |
Equity securities | 0 | 0
Debt securities | 0 | 0
Derivative assets | 0 | 0
Total Assets | 0 | 0
Liabilities |  |
Derivative liabilities | 0 | 0
Total Liabilities | $ 0 | $ 0

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