Balance Sheet Components (Details) - USD ($) $ in Millions	9 Months Ended
	Oct. 27, 2019	Oct. 28, 2018	Jan. 27, 2019
Inventories:
Raw materials	$ 255		$ 613
Work in-process	265		238
Finished goods	527		724
Total inventories	1,047		1,575
Accrued and Other Current Liabilities:
Customer program accruals	353		302
Accrued payroll and related expenses	155		186
Deferred revenue	119		92
Operating lease liabilities	89		0
Taxes payable	52		91
Licenses payable	18		12
Professional service fee	18		14
Other	80		121
Total accrued and other current liabilities	884		818
Other Long-Term Liabilities:
Income taxes payable	511		513
Deferred revenue	57		46
Deferred income tax liability	25		19
Licenses payable	22		1
Employee benefits liability	22		20
Deferred rent	0		21
Other	25		13
Total other long-term liabilities	662		$ 633
One time transition tax payable, noncurrent	317
Unrecognized tax benefits	168
Interest and penalties related to unrecognized tax benefits	26
Movement in Deferred Revenue [Roll Forward]
Balance, January 27, 2019	138	$ 63
Deferred revenue added during the period	237	271
Revenue recognized during the period	(199)	(214)
Balance, October 27, 2019	$ 176	$ 120