| Line Item | Jun 30, 2026 | Mar 31, 2026 | Jun 30, 2025 | Mar 31, 2025 |
|---|---|---|---|---|
| Revenues from continuing operations: | ||||
| Total revenues | ||||
| Costs and expenses from continuing operations: | ||||
| Selling, general and administrative expenses | ||||
| Research and development expenses | ||||
| Property, plant and equipment impairment charge | — | |||
| Other expense (income), net | ||||
| Total costs and expenses | ||||
| % of revenue | 230.5% | 99.9% | ||
| Operating income (loss) from continuing operations | ||||
| % of revenue | -130.5% | 0.1% | ||
| Interest income | ||||
| Interest expense | ||||
| Facility fees and debt-related income (expense) | ||||
| Defined benefit pension income (expense) | ||||
| Income (loss) from continuing operations before income taxes and equity in income | ||||
| Income tax benefit (expense) from continuing operations | ||||
| Equity in income (loss) of unconsolidated entities, net | ||||
| Income (loss) from continuing operations | ||||
| Discontinued operations: | ||||
| Income (loss) from discontinued operations | — | |||
| Income tax benefit (expense) from discontinued operations | ||||
| Income (loss) from discontinued operations, net of tax | ||||
| Net income (loss) | ||||
| % of revenue | -210.6% | -1.7% | ||
| Less: Net loss (income) attributable to noncontrolling interests | ||||
| Net income (loss) attributable to Enviri Corporation | ||||
| % of revenue | -211.4% | -1.9% | ||
| Amounts attributable to Enviri Corporation common stockholders: | ||||
| Net income (loss) attributable to Enviri Corporation | ||||
| % of revenue | -211.4% | -1.9% | ||
| Basic earnings (loss) per common share attributable to Enviri Corporation common stockholders: | ||||
| Basic earnings (loss) per share attributable to Enviri Corporation common stockholders (in dollars per share) | ||||
| Diluted earnings (loss) per share attributable to Enviri Corporation common stockholders (in dollars per share) |