Fair Value Measurements - Investment Impairments and Credit Loss Reserves (Details) - USD ($) $ in Millions |
Jul. 27, 2025 |
Jan. 26, 2025 |
|---|---|---|
| Fair Value Disclosures [Abstract] | ||
| Credit loss reserve for held-to-maturity debt securities and available for sale debt securities | $ 4.5 | $ 4.5 |