Fair Value Measurements - Balance Sheet Items (Details) - USD ($) $ in Thousands	May 02, 2020	Feb. 01, 2020	May 04, 2019
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (Level 1)	$ 2,669,535	$ 1,351,205	$ 1,366,592
Restricted cash and cash equivalents (Level 1)	60,831	60,205	65,925
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments (Level 2)	$ 8	$ 8	$ 8