Employee Benefit Plans (Components Of Net Periodic Pension Costs) (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jan. 31, 2016 |
Jan. 31, 2015 |
Jan. 31, 2016 |
Jan. 31, 2015 |
|
| General Discussion of Pension and Other Postretirement Benefits [Abstract] | ||||
| Service cost | $ 4,500 | $ 5,100 | $ 9,100 | $ 10,300 |
| Interest cost | 4,800 | 4,900 | 9,500 | 9,700 |
| Expected return on assets | (7,200) | (7,500) | (14,500) | (14,900) |
| Prior service cost and transition amortization | 100 | 100 | 300 | 300 |
| Settlement cost | 0 | 3,900 | 0 | 3,900 |
| Actuarial loss amortization | 2,100 | 1,900 | 4,300 | 3,700 |
| Net periodic benefit cost | $ 4,300 | $ 8,400 | $ 8,700 | $ 13,000 |