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Goodwill and Acquired Intangible Assets, Net - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Aug. 02, 2025 | Aug. 03, 2024 | Aug. 02, 2025 | Aug. 03, 2024 | Feb. 01, 2025
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Goodwill | $ 11,062.2 |  | $ 11,062.2 |  | $ 11,586.9
Weighted average remaining amortization period (years) |  |  | 3 years |  | 3 years 3 months 18 days
Amortization of acquired intangible assets | 243.7 | $ 275.7 | $ 489.4 | $ 540.6 |
Disposal Group, Held-for-Sale, Not Discontinued Operations | Marvell Technology's Automotive Ethernet Business |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Goodwill | $ 524.7 |  | $ 524.7 |  |
Developed technologies |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Impairment of intangible assets, finite-lived |  |  |  |  | $ 240.1
Weighted average remaining amortization period (years) |  |  | 3 years 4 months 24 days |  | 3 years 7 months 6 days
In-process research and development | Minimum |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Weighted average remaining amortization period (years) |  |  | 8 years |  |
In-process research and development | Maximum |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Weighted average remaining amortization period (years) |  |  | 9 years |  |

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