Fair Value Measurements - Balance Sheet Items (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Feb. 01, 2020	Nov. 02, 2019
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (Level 1)	$ 4,416,124	$ 1,351,205	$ 1,142,709
Restricted cash and cash equivalents (Level 1)	135,718	60,205	60,818
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments (Level 2)	$ 8	$ 8	$ 8