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v3.25.1

Income Taxes (Tables) | 12 Months Ended
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Mar. 31, 2025
Income Tax Disclosure [Abstract] |
Components of Income Tax Expense (Benefit) | The income tax provision (benefit) consists of the following (amounts in millions):
| Fiscal Year Ended March 31,
| 2025 |  | 2024 |  | 2023
Income before income taxes: |  |  |  |  |
U.S. | $ | (131.5) |  |  | $ | 555.5 |  |  | $ | 674.7 |
Foreign | 170.4 |  |  | 1,810.4 |  |  | 2,235.0 |
Total income before income taxes | $ | 38.9 |  |  | $ | 2,365.9 |  |  | $ | 2,909.7 |
Current provision: |  |  |  |  |
U.S. Federal | $ | 127.5 |  |  | $ | 347.5 |  |  | $ | 389.5 |
State | — |  |  | 20.0 |  |  | 5.0 |
Foreign | 55.2 |  |  | 118.7 |  |  | 72.0 |
Total current provision | $ | 182.7 |  |  | $ | 486.2 |  |  | $ | 466.5 |
Deferred provision (benefit): |  |  |  |  |
U.S. Federal | $ | (101.0) |  |  | $ | (106.4) |  |  | $ | 53.7 |
State | (5.5) |  |  | (12.3) |  |  | 4.6 |
Foreign | (36.8) |  |  | 91.5 |  |  | 147.2 |
Total deferred provision (benefit) | (143.3) |  |  | (27.2) |  |  | 205.5 |
Income tax provision | $ | 39.4 |  |  | $ | 459.0 |  |  | $ | 672.0 |
Reconciliation of Expected Federal Income Tax Expense to Actual | The provision (benefit) for income taxes differs from the amount computed by applying the statutory federal tax rate to income before income taxes. The sources and tax effects of the differences in the total income tax provision are as follows (amounts in millions):
| Fiscal Year Ended March 31,
| 2025 |  | 2024 |  | 2023
Computed expected income tax provision | $ | 8.2 |  |  | $ | 496.8 |  |  | $ | 611.0 |
State income taxes, net of federal benefit | (2.1) |  |  | 15.7 |  |  | 8.6 |
Effects of foreign operations - rate differential | (19.2) |  |  | (149.3) |  |  | (184.0) |
Effects of foreign operations - other, net of foreign tax credits | 55.0 |  |  | 212.2 |  |  | 258.9 |
Foreign-derived intangible income (FDII) | (3.1) |  |  | (3.6) |  |  | — |
Business realignment of intellectual property rights | 5.7 |  |  | 0.4 |  |  | — |
Change in uncertain tax positions | 45.1 |  |  | 5.8 |  |  | 50.6 |
Share-based compensation | (14.1) |  |  | (8.4) |  |  | (11.4) |
R&D tax credits | (60.1) |  |  | (69.8) |  |  | (63.8) |
Income tax holidays | (12.0) |  |  | (22.5) |  |  | (26.7) |
Nondeductible Expenses | 6.0 |  |  | 7.7 |  |  | 9.4 |
Other | 13.4 |  |  | 2.6 |  |  | 10.3 |
Change in valuation allowance | 16.6 |  |  | (28.6) |  |  | 9.1 |
Income tax provision | $ | 39.4 |  |  | $ | 459.0 |  |  | $ | 672.0 |
Schedule of Deferred Tax Assets and Liabilities | The tax effects of temporary differences that give rise to significant portions of the Company's deferred tax assets and deferred tax liabilities are as follows (amounts in millions):
| March 31,
| 2025 |  | 2024
Deferred tax assets: |  |  |
Accrued expenses | $ | 51.8 |  |  | $ | 50.2 |
Capital loss carryforward | 9.8 |  |  | 10.5 |
Disallowed expense carryforwards | 242.8 |  |  | 97.8 |
Income tax credits | 266.8 |  |  | 267.8 |
Intangible assets | 1,192.1 |  |  | 1,277.0 |
Inventory valuation | 130.4 |  |  | 72.0 |
Lease liabilities | 33.2 |  |  | 36.2 |
Net operating loss carryforward | 59.3 |  |  | 64.8 |
Share-based compensation | 53.5 |  |  | 40.6 |
Other | 25.6 |  |  | 15.5 |
Gross deferred tax assets | 2,065.3 |  |  | 1,932.4 |
Valuation allowances | (287.4) |  |  | (270.8) |
Deferred tax assets, net of valuation allowances | 1,777.9 |  |  | 1,661.6 |
Deferred tax liabilities: |  |  |
Intangible assets | (50.3) |  |  | (59.0) |
ROU assets | (31.7) |  |  | (34.5) |
Property, plant and equipment | (1.6) |  |  | (0.4) |
Deferred tax liabilities | (83.6) |  |  | (93.9) |
Net deferred tax asset | $ | 1,694.3 |  |  | $ | 1,567.7 |
Reported as: |  |  |
Non-current deferred tax assets | $ | 1,728.1 |  |  | $ | 1,596.5 |
Non-current deferred tax liability | (33.8) |  |  | (28.8) |
Net deferred tax asset | $ | 1,694.3 |  |  | $ | 1,567.7 |
Summary of Valuation Allowance | Additions and deductions related to the valuation allowance for deferred tax assets for the three fiscal years were as follows (amounts in millions):
| Balance at Beginning of Year |  | Additions Charged to Costs and Expenses |  |  |  | Deductions |  | Balance at End of Year
Fiscal 2025 | $ | 270.8 |  |  | $ | 22.2 |  |  |  |  | $ | (5.6) |  |  | $ | 287.4 |
Fiscal 2024 | $ | 299.4 |  |  | $ | 6.5 |  |  |  |  | $ | (35.1) |  |  | $ | 270.8 |
Fiscal 2023 | $ | 290.3 |  |  | $ | 19.3 |  |  |  |  | $ | (10.2) |  |  | $ | 299.4 |
Rollforward of Unrecognized Tax Benefits | The following table summarizes the activity related to the Company's gross unrecognized tax benefits for the three fiscal years (amounts in millions):
| Fiscal Year Ended March 31,
| 2025 |  | 2024 |  | 2023
Beginning gross unrecognized tax benefit | $ | 792.4 |  |  | $ | 848.0 |  |  | $ | 804.1 |
Decreases related to settlements with tax authorities | (0.7) |  |  | (5.8) |  |  | (0.4) |
Decreases related to statute of limitation expirations | (6.9) |  |  | (3.3) |  |  | (11.7) |
Increases related to current year tax positions | 27.1 |  |  | 37.4 |  |  | 65.9 |
Increases (decreases) related to prior year tax positions | 9.3 |  |  | (83.9) |  |  | (9.9) |
Ending gross unrecognized tax benefits | $ | 821.2 |  |  | $ | 792.4 |  |  | $ | 848.0 |

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