Acquisitions (Proforma Information) (Details) - USD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 9 Months Ended |
|---|---|---|
Sep. 30, 2015 |
Sep. 30, 2015 |
|
| Business Acquisition [Line Items] | ||
| Business Acquisition, Pro Forma Revenue | $ 1,073 | $ 3,226 |
| Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax | 497 | 1,493 |
| Business Acquisition, Pro Forma Net Income (Loss) | $ 344 | $ 976 |
| Business Acquisition, Pro Forma Earnings Per Share, Basic | $ 2.88 | $ 8.13 |
| Business Acquisition, Pro Forma Earnings Per Share, Diluted | $ 2.87 | $ 8.09 |