Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions |
Jan. 31, 2016 |
Jul. 31, 2015 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Accounts receivable, allowance | $ 6.5 | $ 6.7 |
| Preferred stock, par value | $ 1.00 | $ 1.00 |
| Preferred stock, shares authorized | 1,000,000 | 1,000,000 |
| Preferred stock, shares issued | 0 | 0 |
| Common stock, par value | $ 5.00 | $ 5.00 |
| Common stock, shares authorized | 240,000,000 | 240,000,000 |
| Common stock, shares issued | 151,643,194 | 151,643,194 |
| Treasury stock, shares | 18,712,985 | 17,044,950 |