CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands		Total	Parent [Member]	Common Stock		Treasury Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Noncontrolling Interest
Beginning balance (in shares) at Jan. 31, 2024	[1],[2]			334,453
Beginning balance at Jan. 31, 2024		$ 5,190,594	$ 5,180,308	$ 34	[1],[2]	$ (67,140)	$ 9,331,238	$ (8,220)	$ (4,075,604)	$ 10,286
Beginning balance, treasury stock (in shares) at Jan. 31, 2024						(492)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	[1],[2]			5,196
Issuance of common stock upon exercise of stock options		35,031	35,031				35,031
Issuance of common stock under employee stock purchase plan (in shares)	[1],[2]			660
Issuance of common stock under employee stock purchase plan		77,053	77,053				77,053
Issuance of common stock in connection with a business combination (in shares)	[1],[2]			1
Issuance of common stock in connection with a business combination subject to future vesting (in shares)	[1],[2]			68
Cancellation of common stock issued in connection with business combinations (in shares)	[1],[2]			(71)
Cancellation of common stock issued in connection with business combinations		(67)	(67)				(67)
Vesting of restricted stock units (in shares)	[1],[2]			7,569
Vesting of restricted stock units				$ 1	[1],[2]		(1)
Shares withheld related to net share settlement of equity awards (in shares)	[1],[2]			(2,591)
Issuance of common stock in connection with a business combination subject to future vesting		(356,178)	(356,178)				(356,178)
Repurchases and retirement of common stock, including transaction costs and excise tax, if any (in shares)	[1],[2]			(14,765)
Repurchases and retirement of common stock, including transaction costs and excise tax, if any		(1,936,724)	(1,936,724)	$ (2)	[1],[2]				(1,936,722)
Reissuance of treasury stock upon settlement of equity awards (in shares)						43
Reissuance of treasury stock upon settlement of equity awards		100	100			$ 5,750	(5,650)
Purchases of capped calls related to convertible senior notes		(195,500)	(195,500)				(195,500)
Stock-based compensation		1,078,128	1,078,128				1,078,128
Other comprehensive income (loss)		5,460	5,460					5,460
Net income (loss)		(963,488)	(958,166)						(958,166)	(5,322)
Ending balance (in shares) at Oct. 31, 2024	[2],[3],[4]			330,520
Ending balance at Oct. 31, 2024		2,934,409	2,929,445	$ 33	[1],[2],[4]	$ (61,390)	9,964,054	(2,760)	(6,970,492)	4,964
Ending balance, treasury stock (in shares) at Oct. 31, 2024						(449)
Beginning balance (in shares) at Jul. 31, 2024	[3],[4]			335,620
Beginning balance at Jul. 31, 2024		4,137,588	4,129,001	$ 34	[3],[4]	$ (62,800)	9,822,965	(5,379)	(5,625,819)	8,587
Beginning balance, treasury stock (in shares) at Jul. 31, 2024						(460)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	[3],[4]			2,010
Issuance of common stock upon exercise of stock options		11,551	11,551				11,551
Issuance of common stock under employee stock purchase plan (in shares)	[3],[4]			314
Issuance of common stock under employee stock purchase plan		30,318	30,318				30,318
Issuance of common stock in connection with a business combination subject to future vesting (in shares)	[3],[4]			68
Cancellation of common stock issued in connection with business combinations (in shares)	[3],[4]			(71)
Cancellation of common stock issued in connection with business combinations		(67)	(67)				(67)
Vesting of restricted stock units (in shares)	[3],[4]			2,117
Shares withheld related to net share settlement of equity awards (in shares)	[3],[4]			(712)
Issuance of common stock in connection with a business combination subject to future vesting		(80,213)	(80,213)				(80,213)
Repurchases and retirement of common stock, including transaction costs and excise tax, if any (in shares)	[3],[4]			(8,826)
Repurchases and retirement of common stock, including transaction costs and excise tax, if any		(1,020,395)	(1,020,395)	$ (1)	[3],[4]				(1,020,394)
Reissuance of treasury stock upon settlement of equity awards (in shares)						11
Reissuance of treasury stock upon settlement of equity awards		17	17			$ 1,410	(1,393)
Purchases of capped calls related to convertible senior notes		(195,500)	(195,500)				(195,500)
Stock-based compensation		376,393	376,393				376,393
Other comprehensive income (loss)		2,619	2,619					2,619
Net income (loss)		(327,902)	(324,279)						(324,279)	(3,623)
Ending balance (in shares) at Oct. 31, 2024	[2],[3],[4]			330,520
Ending balance at Oct. 31, 2024		2,934,409	2,929,445	$ 33	[1],[2],[4]	$ (61,390)	9,964,054	(2,760)	(6,970,492)	4,964
Ending balance, treasury stock (in shares) at Oct. 31, 2024						(449)
Beginning balance (in shares) at Jan. 31, 2025	[1]			334,301
Beginning balance at Jan. 31, 2025		$ 3,006,643	2,999,929	$ 34	[1]	$ (59,505)	10,355,211	(2,236)	(7,293,575)	6,714
Beginning balance, treasury stock (in shares) at Jan. 31, 2025		(436)				(436)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	[1]			6,942
Issuance of common stock upon exercise of stock options		$ 63,584	63,584				63,584
Issuance of common stock under employee stock purchase plan (in shares)	[1]			817
Issuance of common stock under employee stock purchase plan		88,123	88,123				88,123
Vesting of restricted stock units (in shares)	[1]			7,130
Shares withheld related to net share settlement of equity awards (in shares)	[1]			(2,460)
Issuance of common stock in connection with a business combination subject to future vesting		(486,261)	(486,261)				(486,261)
Repurchases and retirement of common stock, including transaction costs and excise tax, if any (in shares)	[1]			(4,257)
Repurchases and retirement of common stock, including transaction costs and excise tax, if any		(723,534)	(723,534)						(723,534)
Reissuance of treasury stock upon settlement of equity awards (in shares)						28
Reissuance of treasury stock upon settlement of equity awards		0	0			$ 3,791	(3,791)
Stock-based compensation		1,205,799	1,205,799				1,205,799
Distributions to noncontrolling interest holders and other adjustments		(9,295)					(4,479)		4,479	(9,295)
Other comprehensive income (loss)		7,359	7,359					7,359
Net income (loss)		(1,019,485)	(1,022,066)						(1,022,066)	2,581
Ending balance (in shares) at Oct. 31, 2025	[3]			342,473
Ending balance at Oct. 31, 2025		$ 2,132,933	2,132,933	$ 34	[1]	$ (55,714)	11,218,186	5,123	(9,034,696)	0
Ending balance, treasury stock (in shares) at Oct. 31, 2025		(408)				(408)
Beginning balance (in shares) at Jul. 31, 2025	[3]			339,179
Beginning balance at Jul. 31, 2025		$ 2,379,589	2,372,648	$ 34	[3]	$ (56,968)	10,939,122	2,782	(8,512,322)	6,941
Beginning balance, treasury stock (in shares) at Jul. 31, 2025						(417)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		2,530		2,530	[3]
Issuance of common stock upon exercise of stock options		$ 26,906	26,906				26,906
Issuance of common stock under employee stock purchase plan (in shares)	[3]			263
Issuance of common stock under employee stock purchase plan		34,930	34,930				34,930
Vesting of restricted stock units (in shares)	[3]			2,377
Shares withheld related to net share settlement of equity awards (in shares)	[3]			(833)
Issuance of common stock in connection with a business combination subject to future vesting		(188,791)	(188,791)				(188,791)
Repurchases and retirement of common stock, including transaction costs and excise tax, if any (in shares)	[3]			(1,043)
Repurchases and retirement of common stock, including transaction costs and excise tax, if any		(232,896)	(232,896)						(232,896)
Reissuance of treasury stock upon settlement of equity awards (in shares)						9
Reissuance of treasury stock upon settlement of equity awards		0	0			$ 1,254	(1,254)
Stock-based compensation		411,752	411,752				411,752
Distributions to noncontrolling interest holders and other adjustments		(9,295)					(4,479)		4,479	(9,295)
Other comprehensive income (loss)		2,341	2,341					2,341
Net income (loss)		(291,603)	(293,957)						(293,957)	2,354
Ending balance (in shares) at Oct. 31, 2025	[3]			342,473
Ending balance at Oct. 31, 2025		$ 2,132,933	$ 2,132,933	$ 34	[1]	$ (55,714)	$ 11,218,186	$ 5,123	$ (9,034,696)	$ 0
Ending balance, treasury stock (in shares) at Oct. 31, 2025		(408)				(408)

[1] (1) On July 3, 2025, all authorized shares of the Company’s Class B common stock were eliminated and the Company’s Class A common stock was renamed to “common stock”, pursuant to the terms of the Company’s amended and restated certificate of incorporation. Unless otherwise noted, all references herein to the Company’s common stock refer to the Class A common stock prior to the effectiveness of the certificate. See Note 12, “Equity,” for further details.

[2] (2) In connection with a business combination completed during the three months ended January 31, 2024, the Company issued approximately 0.2 million shares of its common stock to one of its wholly-owned subsidiaries, in exchange for a noncontrolling equity interest in the acquired company that was held by the subsidiary prior to this business combination. These shares were treated as treasury stock for accounting purposes as of January 31, 2024, April 30, 2024, and July 31, 2024, and were subsequently transferred to the Company and retired during the three months ended October 31, 2024. These shares are not reflected in the table above.

[3] (1) On July 3, 2025, all authorized shares of the Company’s Class B common stock were eliminated and the Company’s Class A common stock was renamed to “common stock”, pursuant to the terms of the Company’s amended and restated certificate of incorporation. Unless otherwise noted, all references herein to the Company’s common stock refer to the Class A common stock prior to the effectiveness of the certificate. See Note 12, “Equity,” for further details.

[4] (2) In connection with a business combination completed during the three months ended January 31, 2024, the Company issued approximately 0.2 million shares of its common stock to one of its wholly-owned subsidiaries, in exchange for a noncontrolling equity interest in the acquired company that was held by the subsidiary prior to this business combination. These shares were treated as treasury stock for accounting purposes as of January 31, 2024, April 30, 2024, and July 31, 2024, and were subsequently transferred to the Company and retired during the three months ended October 31, 2024. These shares are not reflected in the table above.