Acquistions Pro forma Information (Details) - USD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 6 Months Ended |
|---|---|---|
Feb. 01, 2015 |
Feb. 01, 2015 |
|
| Business Acquisition, Pro Forma Information [Abstract] | ||
| Business Acquisition, Pro Forma Revenue | $ 2,257 | $ 4,537 |
| Business Acquisition, Pro Forma Net Income (Loss) | $ 222 | $ 471 |
| Business Acquisition, Pro Forma Earnings Per Share, Diluted | $ 0.71 | $ 1.50 |