Geographic Information - Schedule of Long-lived Assets by Geographic Areas (Details) - USD ($) $ in Millions |
Apr. 30, 2026 |
Jan. 31, 2026 |
|---|---|---|
| Long-Lived Assets [Line Items] | ||
| Total long-lived assets | $ 1,827 | $ 1,812 |
| U.S. | ||
| Long-Lived Assets [Line Items] | ||
| Total long-lived assets | 1,046 | 1,080 |
| Ireland | ||
| Long-Lived Assets [Line Items] | ||
| Total long-lived assets | 566 | 531 |
| Other countries | ||
| Long-Lived Assets [Line Items] | ||
| Total long-lived assets | $ 215 | $ 201 |