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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