Leases - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jul. 31, 2026 |
Jul. 31, 2025 |
Jul. 31, 2026 |
Jul. 31, 2025 |
|
| Leases [Line Items] | ||||
| Operating lease expense | $ 6 | $ 4 | $ 11 | $ 8 |
| Maximum | ||||
| Leases [Line Items] | ||||
| Operating leases, options to extend leases term | 5 years | 5 years | ||