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Summary of Significant Accounting Policies (Narrative) (Details) $ in Millions | 12 Months Ended
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Mar. 31, 2022 USD ($) Reporting_Unit | Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($)
Revenue Recognition |  |  |
Sales contract with customer term | 1 year |  |
Advertising Costs |  |  |
Advertising costs | $ 628.9 | $ 450.0 | $ 298.6
Inventories |  |  |
Inventory liability | $ 46.4 | $ 11.8 |
Leases |  |  |
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | Other assets | Other assets |
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] | Accrued and other current liabilities | Accrued and other current liabilities |
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | Other Liabilities, Noncurrent | Other Liabilities, Noncurrent |
Impairment of Goodwill |  |  |
Number of reporting units | Reporting_Unit | 1 |  |
Minimum |  |  |
Revenue Recognition |  |  |
Post-contract customer support revenue recognition period | 1 year |  |
Required customer payment period | 30 days |  |
Intangible Assets |  |  |
Estimated useful life | 1 year |  |
Product Warranties |  |  |
Product warranty period | 1 year |  |
Maximum |  |  |
Revenue Recognition |  |  |
Post-contract customer support revenue recognition period | 2 years |  |
Required customer payment period | 60 days |  |
Intangible Assets |  |  |
Estimated useful life | 10 years |  |
Product Warranties |  |  |
Product warranty period | 3 years |  |
Plant and buildings |  |  |
Property, Plant and Equipment |  |  |
Estimated useful life | 25 years |  |
Equipment | Minimum |  |  |
Property, Plant and Equipment |  |  |
Estimated useful life | 3 years |  |
Equipment | Maximum |  |  |
Property, Plant and Equipment |  |  |
Estimated useful life | 5 years |  |
Internal-use software | Minimum |  |  |
Property, Plant and Equipment |  |  |
Estimated useful life | 3 years |  |
Internal-use software | Maximum |  |  |
Property, Plant and Equipment |  |  |
Estimated useful life | 10 years |  |
Tooling | Minimum |  |  |
Property, Plant and Equipment |  |  |
Estimated useful life | 6 months |  |
Tooling | Maximum |  |  |
Property, Plant and Equipment |  |  |
Estimated useful life | 1 year |  |
Leasehold Improvements | Maximum |  |  |
Property, Plant and Equipment |  |  |
Estimated useful life | 10 years |  |
Performance-based RSU |  |  |
Share-based Compensation Expense |  |  |
Share based compensation expense recognition period | 3 years |  |
Market Based RSUs | 2006 Plan |  |  |
Share-based Compensation Expense |  |  |
Vesting period | 3 years |  |
Operating Expense |  |  |
Advertising Costs |  |  |
Advertising costs | $ 267.8 | $ 168.2 | $ 64.5

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