Balance Sheet Components (Details) - USD ($) $ in Millions		12 Months Ended
		Jan. 27, 2019		Jan. 28, 2018	Jan. 29, 2017
Inventories:
Raw materials		$ 613		$ 227
Work in-process		238		192
Finished goods		724		377
Total inventories		1,575		796
Property, Plant and Equipment [Line Items]
Total property and equipment, gross		2,171		1,737
Accumulated depreciation and amortization		(767)		(740)
Total property and equipment, net		1,404		997
Accrued and Other Current Liabilities:
Customer program accruals		302		181
Accrued payroll and related expenses		186		172
Deferred revenue	[1]	92		53
Taxes payable		91		33
Accrued legal settlement costs		24		0
Coupon interest on debt obligations		20		20
Warranty accrual	[2]	18		15
Professional service fees		14		15
Accrued royalties		10		17
Other		61		36
Total accrued and other current liabilities		818		542
Other Long-Term Liabilities:
Income tax payable		513	[3]	559
Deferred revenue	[4]	46		15
Deferred rent		21		9
Employee benefits liability		20		12
Deferred income tax liability		19		18
Other		14		19
Total other long-term liabilities		633		632
One time transition tax payable, noncurrent		350
Unrecognized tax benefits		142
Interest and penalties		$ 21		15	$ 13
Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life		3 years
Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life		5 years
Land
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	[5]	$ 218		218
Building
Property, Plant and Equipment [Line Items]
Total property and equipment, gross		$ 339		348
Estimated Useful Life		30 years
Building | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life		25 years
Building | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life		30 years
Test equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, gross		$ 516		462
Test equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life		3 years
Test equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life		5 years
Computer equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, gross		$ 522		285
Computer equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life		3 years
Computer equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life		5 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	[6]	$ 263		198
Software and licenses
Property, Plant and Equipment [Line Items]
Total property and equipment, gross		$ 109		88
Software and licenses | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life		3 years
Software and licenses | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life		5 years
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, gross		$ 69		79
Estimated Useful Life		5 years
Capital leases
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	[6]	$ 28		28
Construction in process
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	[7]	$ 107		$ 31

[1] Deferred revenue primarily includes customer advances and deferrals related to license and development arrangements and PCS.

[2] Refer to Note 12 of these Notes to the Consolidated Financial Statements for a discussion regarding warranties.

[3] As of January 27, 2019, represents the long-term portion of the one-time transition tax payable of $350 million, as well as unrecognized tax benefits of $142 million and related interest and penalties of $21 million.

[4] Deferred revenue primarily includes deferrals related to license and development arrangements and PCS.

[5] Land is a non-depreciable asset.

[6] Leasehold improvements and capital leases are amortized based on the lesser of either the asset’s estimated useful life or the remaining expected lease term.

[7] Construction in process represents assets that are not available for their intended use as of the balance sheet date.