STOCK-BASED COMPENSATION - Summary of RSU Activity (Details) - USD ($) $ / shares in Units, $ in Thousands		6 Months Ended
	Jul. 29, 2020	Jun. 30, 2020
Weighted-Average Grant Date Fair Value
Award vesting period		4 years
Restricted securities units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option expense		$ 64,036
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized		3 years 5 months 1 day
Shares (in thousands)
Unvested — Beginning balance (in shares)		1,741,000
Granted (in shares)		1,544,000
Vested (in shares)		(416,000)
Forfeited (in shares)		(242,000)
Unvested — Ending balance (in shares)		2,627,000
Weighted-Average Grant Date Fair Value
Unvested — Beginning balance (in usd per share)		$ 18.55
Granted (in usd per share)		38.29
Vested (in usd per share)		18.88
Forfeited (in usd per share)		22.16
Unvested — Ending balance (in usd per share)		$ 29.76
Award vesting period		4 years
Performance Shares [Member]
Shares (in thousands)
Unvested — Ending balance (in shares)		1,252,500
Subsequent Event | Restricted stock units
Shares (in thousands)
Granted (in shares)	91,593
Weighted-Average Grant Date Fair Value
Compensation not yet recognized, awards other than options	$ 6,100
Maximum | Employees and non-employee directors | Restricted stock units
Weighted-Average Grant Date Fair Value
Award vesting period		4 years