Stock-Based Compensation - Allocation of Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 27, 2019	Oct. 28, 2018	Oct. 27, 2019	Oct. 28, 2018
Share-based Compensation
Total	$ 223	$ 140	$ 624	$ 400
Cost of revenue
Share-based Compensation
Total	15	5	27	21
Research and development
Share-based Compensation
Total	141	88	400	237
Sales, general and administrative
Share-based Compensation
Total	$ 67	$ 47	$ 197	$ 142