Balance Sheet Components (Details) - USD ($) $ in Millions		12 Months Ended
		Jan. 28, 2018		Jan. 29, 2017	Jan. 31, 2016
Inventories
Raw Materials		$ 227		$ 252
Work in-process		192		176
Finished goods		377		366
Total inventories		796		794
Property, Plant and Equipment [Line Items]
One time transition tax payable, noncurrent		369
Purchase cost for Santa Clara campus building		335
Total property and equipment, gross		1,737		1,191
Accumulated depreciation and amortization		(740)		(670)
Total property and equipment, net		997		521
Depreciation Expense		144		118	$ 124
Accumulated amortization of LHI and capital lease		178		164
Accrued Liabilities
Customer related liabilities	[1]	181		197
Accrued payroll and related expenses		172		137
Deferred revenue, current	[2]	53		85
Taxes payable, current		33		4
Coupon interest on debt obligations		20		21
Accrued royalties		17		7
Professional service fees		15		13
Warranty accrual		15	[3]	8	11
Accrued restructuring and other charges		7		13
Leases payable		5		4
Contributions payable, current		4		4
Other		20		14
Total accrued and other current liabilities		542		507
Other Long-term Liabilities
Income taxes payable		559	[4]	96
Deferred income tax liability		18	[4]	141
Deferred revenue, noncurrent		15		4
Employee benefits liability		12		10
Contributions payable, noncurrent		9		9
Deferred rent		9		6
Licenses payable, noncurrent		8		1
Other		2		10
Total other long-term liabilities		632		277
unrecognized tax benefit (non current)		175
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued		15		13	$ 11
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		$ 348	[6]	13
Property, Plant and Equipment, Estimated Useful Lives		25-30 (B)
Test equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, gross		$ 462		427
Property, Plant and Equipment, Estimated Useful Lives		3-5
Computer equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, gross		$ 285		188
Property, Plant and Equipment, Estimated Useful Lives		3-5
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	[7]	$ 198		176
Software and licenses
Property, Plant and Equipment [Line Items]
Total property and equipment, gross		$ 88		63
Property, Plant and Equipment, Estimated Useful Lives		3-5
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, gross		$ 79		49
Property, Plant and Equipment, Estimated Useful Lives		5
Capital leases
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	[7]	$ 28		28
Construction in process
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	[8]	$ 31		$ 29

[1] Customer related liabilities include accrued customer programs, such as rebates and marketing development funds.

[2] Deferred revenue primarily includes customer advances and deferrals related to license and service arrangements.

[3] Refer to Note 10 of these Notes to the Consolidated Financial Statements for a discussion regarding warranties.

[4] .

[5] Land is a non-depreciable asset.

[6] In January 2018, we terminated the off-balance sheet, build-to-suit operating lease financing arrangement related to our new Santa Clara campus building and exercised our option to purchase the property for $335 million, which has been recorded as Property and Equipment, net in our Consolidated Balance Sheet.

[7] 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.

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