Goodwill and Acquired Intangible Assets, Net - Net Carrying Amounts and Weighted Average Amortization Period (Details) - USD ($) $ in Thousands	3 Months Ended
	May 02, 2020	May 04, 2019	Feb. 01, 2020
Acquired Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets (excluding goodwill)	$ 139,000		$ 139,000
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amounts	3,177,000		3,177,000
Accumulated Amortization	(664,322)		(551,400)
Net Carrying Amounts	2,512,678		2,625,600
Gross Carrying Amounts, Total acquired intangible assets	3,316,000		3,316,000
Net Carrying Amounts, Total acquired intangible assets	$ 2,651,678		2,764,600
Weighted-Average Remaining Amortization Period (Years)	6 years 2 months 12 days	6 years 5 months 4 days
Developed technologies
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amounts	$ 2,511,000		2,511,000
Accumulated Amortization	(500,301)		(413,735)
Net Carrying Amounts	$ 2,010,699		2,097,265
Weighted-Average Remaining Amortization Period (Years)	6 years 2 months 4 days	6 years 4 months 28 days
Customer contracts and related relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amounts	$ 643,000		643,000
Accumulated Amortization	(153,916)		(128,939)
Net Carrying Amounts	$ 489,084		514,061
Weighted-Average Remaining Amortization Period (Years)	6 years 4 months 9 days	6 years 7 months 9 days
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amounts	$ 23,000		23,000
Accumulated Amortization	(10,105)		(8,726)
Net Carrying Amounts	$ 12,895		$ 14,274
Weighted-Average Remaining Amortization Period (Years)	2 years 9 months	2 years 11 months 15 days