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Segment And Geographic Information (Geographic Table) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | $ 345 | $ 359 | $ 1,203 | $ 918
Income before income taxes | 183 | 202 | 733 | 331
United States [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | 265 | 261 | 947 | 640
Income before income taxes | 156 | 155 | 641 | 198
International [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | 80 | 98 | 256 | 278
Income before income taxes | $ 27 | $ 47 | $ 92 | $ 133

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