Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions |
Mar. 31, 2021 |
Mar. 31, 2020 |
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| Deferred tax assets: | ||
| Inventory valuation | $ 46.0 | $ 48.5 |
| Net operating loss carryforward | 68.0 | 74.8 |
| Capital loss carryforward | 6.3 | 9.4 |
| Share-based compensation | 46.5 | 39.8 |
| Income tax credits | 331.1 | 351.1 |
| Property, plant and equipment | 32.7 | 31.7 |
| Accrued expenses | 83.6 | 80.4 |
| Intangible assets | 1,581.5 | 1,694.8 |
| Lease liabilities | 37.1 | 20.2 |
| Other | 17.4 | 14.0 |
| Gross deferred tax assets | 2,250.2 | 2,364.7 |
| Valuation allowances | (290.3) | (303.5) |
| Deferred tax assets, net of valuation allowances | 1,959.9 | 2,061.2 |
| Deferred tax liabilities: | ||
| Convertible debt | (53.9) | (228.7) |
| Intangible assets | (158.1) | (365.1) |
| ROU assets | (34.5) | (24.3) |
| Other | (8.1) | (13.1) |
| Deferred tax liabilities | (254.6) | (631.2) |
| Net deferred tax asset | 1,705.3 | 1,430.0 |
| Reported as: | ||
| Non-current deferred tax assets | 1,749.2 | 1,748.5 |
| Non-current deferred tax liability | (43.9) | (318.5) |
| Net deferred tax asset | $ 1,705.3 | $ 1,430.0 |
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- Definition Deferred Tax Assets, Lease Liabilities No definition available.
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- Definition Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Intangible Assets No definition available.
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- Definition Deferred Tax Liabilities, Right-Of-Use Assets No definition available.
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- Definition Deferred Tax Liability, Senior and Junior Convertible Debentures No definition available.
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- References No definition available.
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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting. 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 capital loss carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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 before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, 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. No definition available.
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. 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 accrued liabilities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from reserves and accruals, classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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 of deferred tax liability attributable to taxable temporary differences classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from long-lived assets other than property, plant, and equipment. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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