CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions |
Apr. 30, 2019 |
Jul. 31, 2018 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Accounts receivable, allowance | $ 5.7 | $ 8.3 |
| Preferred stock, par value (in usd per share) | $ 1 | $ 1 |
| Preferred stock, shares authorized (in shares) | 1,000,000 | 1,000,000 |
| Preferred stock, shares issued (in shares) | 0 | 0 |
| Common stock, par value (in usd per share) | $ 5 | $ 5 |
| Common stock, shares authorized (in shares) | 240,000,000 | 240,000,000 |
| Common stock, shares issued (in shares) | 151,643,194 | 151,643,194 |
| Treasury stock, shares (in shares) | 23,866,959 | 22,871,145 |