| In millions, except per share items | Feb-28-22 | Feb-28-21 | Feb-29-20 | Feb-28-19 | Feb-28-18 | Feb-28-17 | Feb-29-16 | Feb-28-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K/A |
| Sales | 902.7 | 838.9 | 1,061.8 | 927.1 | 810.4 | 863.5 | 889.4 | 819.7 |
| Sales growth | 7.6% | -21.0% | 14.5% | 14.4% | -6.2% | -2.9% | 8.5% | 9.0% |
| Costs and Expenses | | | | | | | | |
| Cost of sales | 677.4 | 650.2 | 824.6 | 728.5 | 650.1 | | | |
| Gross margin | 225.2 | 188.7 | 237.2 | 198.6 | 160.3 | 205.3 | 228.1 | 206.8 |
| Gross margin | 25.0% | 22.5% | 22.3% | 21.4% | 19.8% | 23.8% | 25.6% | 25.2% |
| Selling, general and administrative | 113.7 | 107.1 | 139.3 | 121.7 | 112.1 | 106.4 | 107.8 | 98.9 |
| Operating income from continuing operations | 113.3 | 61.6 | 79.3 | 77.0 | 48.2 | 98.9 | 120.3 | 107.9 |
| Operating margin | 12.6% | 7.3% | 7.5% | 8.3% | 6.0% | 11.5% | 13.5% | 13.2% |
| Interest expense | -6.4 | -9.6 | -13.5 | -15.0 | -13.9 | -14.7 | -15.2 | -16.6 |
| Other (income) expense, net | 0.6 | 1.0 | 1.0 | -1.0 | 3.5 | -1.1 | 3.1 | 2.7 |
| Income from continuing operations before income taxes | 106.3 | 51.0 | 64.9 | | | | | |
| Income tax expense | 22.3 | 11.4 | 16.7 | 11.8 | -14.3 | 24.0 | 26.8 | 25.6 |
| Net income (loss) | 84.0 | 39.6 | 48.2 | 51.2 | 45.2 | 61.3 | 75.5 | 65.6 |
| |
| Basic earnings (loss) per share | | | | | | | | |
| |
| Basic earnings per common share (usd per share) | $3.38 | $1.53 | $1.84 | $1.97 | $1.74 | $2.36 | $2.93 | $2.56 |
| |
| Diluted Earnings (Loss) Per Share [Abstract] | | | | | | | | |
| Diluted earnings per common share (usd per share) | $3.35 | $1.52 | $1.84 | $1.96 | $1.73 | $2.35 | $2.91 | $2.55 |
| |
| Weighted average shares outstanding | | | | | | | | |
| Weighted average number common shares, basic (shares) | 24.9 | 25.9 | 26.2 | 26.0 | 26.0 | 26.0 | 25.8 | 25.7 |
| Weighted average number common shares, diluted (shares) | 25.1 | 26.0 | 26.3 | 26.1 | 26.0 | 26.1 | 25.9 | 25.8 |
| |
| Cash dividends declared per common share (usd per share) | $0.68 | $0.68 | $0.68 | $0.68 | $0.68 | $0.64 | $0.60 | |