Segment Information (Details) - USD ($) $ in Millions	3 Months Ended							6 Months Ended	12 Months Ended
	Jan. 28, 2018	Oct. 29, 2017	Apr. 30, 2017	Jan. 29, 2017	Oct. 30, 2016	Jul. 31, 2016	May 01, 2016	Jul. 30, 2017	Jan. 28, 2018	Jan. 29, 2017	Jan. 31, 2016
Segment Reporting
Depreciation and amortization expense									$ 199	$ 187	$ 197
Revenue	$ 2,911	$ 2,636	$ 1,937	$ 2,173	$ 2,004	$ 1,428	$ 1,305	$ 2,230	9,714	6,910	5,010
Operating income (loss)									3,210	1,934	747
Reconciliation from Segment Totals to Consolidated
Stock-based compensation									(391)	(247)	(204)
Unallocated cost of revenue and operating expenses									(237)	(215)	(244)
Acquisition-related costs									(13)	(16)	(22)
Contributions									(2)	(4)	0
Legal settlement costs									0	(16)	0
Restructuring and other charges									0	(3)	(131)
Product warranty charges									0	0	(21)
Reconciliation total in All other									(600)	(237)	(358)
GPU
Segment Reporting
Depreciation and amortization expense									123	116	110
Revenue									8,137	5,822	4,187
Operating income (loss)									3,507	2,180	1,344
Tegra processor
Segment Reporting
Depreciation and amortization expense									37	29	43
Revenue									1,534	824	559
Operating income (loss)									303	(9)	(239)
All Other
Segment Reporting
Depreciation and amortization expense									39	42	44
Revenue									43	264	264
Operating income (loss)									$ (600)	$ (237)	$ (358)