Stock-based compensation - Assumptions to Estimate Fair Value of Stock Options (Details) - Employee Stock Option [Member] |
12 Months Ended | ||
|---|---|---|---|
Jan. 31, 2026 |
Feb. 01, 2025 |
Feb. 03, 2024 |
|
| Weighted-average assumptions to estimate fair value | |||
| Volatility rate | 34.00% | 33.00% | 45.00% |
| Average risk-free interest rate | 3.90% | 4.40% | 3.80% |
| Average expected life (in years) | 3 years 4 months 24 days | 3 years 6 months | 3 years 4 months 24 days |