Segment And Geographic Information (Geographic Table) (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2016 |
Mar. 31, 2015 |
|
| Segment Reporting Information [Line Items] | ||
| Net revenues | $ 489 | $ 172 |
| Income before income taxes | 337 | (111) |
| United States [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Net revenues | 404 | 72 |
| Income before income taxes | 308 | (164) |
| International [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Net revenues | 85 | 100 |
| Income before income taxes | $ 29 | $ 53 |