Financial Instruments - Cash Equivalents, Marketable Securities and Restricted Cash (Details) - USD ($) $ in Thousands	Nov. 01, 2020	Feb. 02, 2020
Debt Securities, Available-for-sale [Line Items]
Total	$ 926,848
Fair Value	937,718
Cash Equivalents	31,883	$ 14,069
Marketable securities	937,718	936,518
Restricted Cash	11,349	15,287
Amortized Cost	926,848	932,260
Total gross unrealized gains	10,915	7,263
Total gross unrealized losses	(45)	(4)
Total fair value	980,950	965,874
Level 1 \| Money market accounts
Debt Securities, Available-for-sale [Line Items]
Fair Value	43,232	26,355
Cash Equivalents	31,883	11,068
Marketable securities	0	0
Restricted Cash	11,349	15,287
Level 2 \| U.S. government treasury notes
Debt Securities, Available-for-sale [Line Items]
Total	346,860	323,751
Gross Unrealized Gains	3,819	2,146
Gross Unrealized Losses	(5)	0
Fair Value	350,674	325,897
Cash Equivalents	0	0
Marketable securities	350,674	325,897
Restricted Cash	0	0
Level 2 \| U.S. government agencies
Debt Securities, Available-for-sale [Line Items]
Total	56,723	53,930
Gross Unrealized Gains	543	317
Gross Unrealized Losses	(1)	(3)
Fair Value	57,265	54,244
Cash Equivalents	0	0
Marketable securities	57,265	54,244
Restricted Cash	0	0
Level 2 \| Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Total	414,234	452,318
Gross Unrealized Gains	4,986	3,954
Gross Unrealized Losses	(37)	(1)
Fair Value	419,183	456,271
Cash Equivalents	0	3,001
Marketable securities	419,183	453,270
Restricted Cash	0	0
Level 2 \| Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Total	20,497	14,994
Gross Unrealized Gains	348	147
Gross Unrealized Losses	(1)	0
Fair Value	20,844	15,141
Cash Equivalents	0	0
Marketable securities	20,844	15,141
Restricted Cash	0	0
Level 2 \| Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Total	88,534	87,267
Gross Unrealized Gains	1,219	699
Gross Unrealized Losses	(1)	0
Fair Value	89,752	87,966
Cash Equivalents	0	0
Marketable securities	89,752	87,966
Restricted Cash	$ 0	$ 0

Debt Securities, Available-for-sale, Cash Equivalents And Restricted Cash

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Debt Securities, Available-for-sale, Cash Equivalents And Restricted Cash, Accumulated Gross Unrealized Gain, Before Tax

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Debt Securities, Available-for-sale, Cash Equivalents And Restricted Cash, Accumulated Gross Unrealized Loss, Before Tax

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Debt Securities, Available-for-sale, Cash Equivalents And Restricted Cash, Amortized Cost

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

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Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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