Income Taxes - Components of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions |
Feb. 28, 2026 |
Feb. 28, 2025 |
|---|---|---|
| Assets | ||
| Property, plant, equipment and intangibles assets | $ 267.2 | $ 263.3 |
| Non-deductible reserves | 19.5 | 21.3 |
| Minimum Taxes | 206.7 | 206.7 |
| Research and development | 386.4 | 410.5 |
| Tax loss carryforwards | 499.6 | 474.7 |
| Other tax carryforwards | 133.4 | 141.3 |
| Deferred Tax Assets, Gross | 1,512.8 | 1,517.8 |
| Valuation allowance | 1,512.8 | 1,517.2 |
| Deferred income tax assets | 0.0 | 0.6 |
| Liabilities | ||
| Property, plant and equipment | 0.0 | 0.6 |
| Deferred income tax liabilities | 0.0 | 0.6 |
| Net deferred income tax asset (liability) | $ 0.0 | $ 0.0 |
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- Definition Deferred Tax Assets, Research and Development No definition available.
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- Definition Minimum Taxes No definition available.
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- Definition Amount of deferred tax liability attributable to taxable temporary differences. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible tax carryforwards, classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from reserves and accruals. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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| X | ||||||||||
- Definition Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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