CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Additional paid-in capital Cumulative Effect, Period of Adoption, Adjustment	Treasury stock	Accumulated other comprehensive loss	Accumulated deficit	Accumulated deficit Cumulative Effect, Period of Adoption, Adjustment
Balance, beginning of period at Jan. 31, 2021		$ 163	$ 4,063,885	$ 0	$ 0	$ (592)	$ (2,469,451)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted and performance stock units		3
Issuance of common stock upon ESPP purchase		0
Stock-based compensation			590,957
Capitalized software development costs			2,116
Issuance of common stock upon exercise of options			1,866
Fair value of replacement equity awards attributable to pre-acquisition service			939
Vesting of early exercised options	$ 87		87
Taxes paid related to net share settlement of equity awards			(149,563)
Issuance of common stock upon ESPP purchase			48,246
Equity component of convertible senior notes, net			287,671
Repurchases of common stock					(1,000,000)
Unrealized loss from investments (net of tax)						(345)
Net loss	(1,198,274)						(1,198,274)
Balance, end of period at Oct. 31, 2021	177,708	166	4,846,204		(1,000,000)	(937)	(3,667,725)
Balance, beginning of period at Jan. 31, 2021		163	4,063,885	0	0	(592)	(2,469,451)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of common stock	(1,000,000)
Balance, end of period at Jan. 31, 2022	222,771	167	5,032,351	(1,026,611)	(1,000,000)	(1,199)	(3,808,548)	299,675
Balance, beginning of period at Jul. 31, 2021		165	4,689,282	0	(229,515)	(864)	(3,324,403)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted and performance stock units		1
Issuance of common stock upon ESPP purchase		0
Stock-based compensation			203,760
Capitalized software development costs			226
Issuance of common stock upon exercise of options			692
Fair value of replacement equity awards attributable to pre-acquisition service			0
Vesting of early exercised options			24
Taxes paid related to net share settlement of equity awards			(47,780)
Issuance of common stock upon ESPP purchase			0
Equity component of convertible senior notes, net			0
Repurchases of common stock					(770,485)
Unrealized loss from investments (net of tax)						(73)
Net loss	(343,322)						(343,322)
Balance, end of period at Oct. 31, 2021	177,708	166	4,846,204		(1,000,000)	(937)	(3,667,725)
Balance, beginning of period at Jan. 31, 2022	222,771	167	5,032,351	(1,026,611)	(1,000,000)	(1,199)	(3,808,548)	299,675
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted and performance stock units		2
Issuance of common stock upon ESPP purchase		1
Stock-based compensation			601,743
Capitalized software development costs			2,958
Issuance of common stock upon exercise of options			1,398
Fair value of replacement equity awards attributable to pre-acquisition service			0
Vesting of early exercised options	1		1
Taxes paid related to net share settlement of equity awards			(163,500)
Issuance of common stock upon ESPP purchase			48,595
Equity component of convertible senior notes, net			0
Repurchases of common stock					0
Unrealized loss from investments (net of tax)						(10,027)
Net loss	(546,654)						(546,654)
Balance, end of period at Oct. 31, 2022	(569,648)	170	4,496,935		(1,000,000)	(11,226)	(4,055,527)
Balance, beginning of period at Jul. 31, 2022		170	4,346,503	$ 0	(1,000,000)	(7,740)	(4,022,907)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted and performance stock units		0
Issuance of common stock upon ESPP purchase		0
Stock-based compensation			188,602
Capitalized software development costs			448
Issuance of common stock upon exercise of options			266
Fair value of replacement equity awards attributable to pre-acquisition service			0
Vesting of early exercised options			0
Taxes paid related to net share settlement of equity awards			(38,884)
Issuance of common stock upon ESPP purchase			0
Equity component of convertible senior notes, net			0
Repurchases of common stock					0
Unrealized loss from investments (net of tax)						(3,486)
Net loss	(32,620)						(32,620)
Balance, end of period at Oct. 31, 2022	$ (569,648)	$ 170	$ 4,496,935		$ (1,000,000)	$ (11,226)	$ (4,055,527)