Customer Deposits (Details 3) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Time Deposits 250000 Or More [Line Items] | ||
| Time Deposits, $100,000 or More | $ 124 | $ 106 |
| United States [Member] | ||
| Time Deposits 250000 Or More [Line Items] | ||
| Time Deposits, $100,000 or More | 117 | 105 |
| Non Us [Member] | ||
| Time Deposits 250000 Or More [Line Items] | ||
| Time Deposits, $100,000 or More | $ 7 | $ 1 |