Income Taxes - Income From Continuing Operations Before Income Taxes (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Income Tax Examination [Line Items] | |||
| Income (loss) before income tax expense (benefit) | $ 1,047.3 | $ 796.2 | $ 702.8 |
| UNITED STATES | |||
| Income Tax Examination [Line Items] | |||
| Foreign operations | 725.3 | 559.5 | 491.9 |
| IRELAND | |||
| Income Tax Examination [Line Items] | |||
| Domestic operations | 56.7 | 62.5 | 51.5 |
| Other locations operations | |||
| Income Tax Examination [Line Items] | |||
| Foreign operations | $ 265.3 | $ 174.2 | $ 159.4 |
| X | ||||||||||
- Definition The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|