Net Income (Loss) Per Share - Schedule of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Denominator:
Weighted-average shares outstanding, basic (in shares)	169,569	163,634	158,023
Net income (loss) per share, basic (in dollars per share)	$ 0.16	$ (2.17)	$ (5.16)
Denominator:
Weighted-average shares outstanding, basic (in shares)	169,569	163,634	158,023
Weighted-average effect of diluted securities related to:
Number of shares used in diluted calculation	175,086	163,634	158,023
Net income (loss) per share, diluted (in dollars per share)	$ 0.06	$ (2.17)	$ (5.16)
Class A Common Stock
Numerator:
Net income (loss), basic	$ 27	$ (339)	$ (778)
Denominator:
Weighted-average shares outstanding, basic (in shares)	162,082	156,335	150,891
Net income (loss) per share, basic (in dollars per share)	$ 0.16	$ (2.17)	$ (5.16)
Numerator:
Net income (loss), basic	$ 27	$ (339)	$ (778)
Gain on extinguishment of debt, net of interest expense	(17)	0	0
Net income (loss), diluted	$ 10	$ (339)	$ (778)
Denominator:
Weighted-average shares outstanding, basic (in shares)	162,082	156,335	150,891
Weighted-average effect of diluted securities related to:
Employee share-based awards (in shares)	1,832	0	0
Convertible senior notes (in shares)	743	0	0
Assumed conversion of Class B to Class A common shares (in shares)	10,429	0	0
Number of shares used in diluted calculation	175,086	156,335	150,891
Net income (loss) per share, diluted (in dollars per share)	$ 0.06	$ (2.17)	$ (5.16)
Class B Common Stock
Numerator:
Net income (loss), basic	$ 1	$ (16)	$ (37)
Denominator:
Weighted-average shares outstanding, basic (in shares)	7,487	7,299	7,132
Net income (loss) per share, basic (in dollars per share)	$ 0.16	$ (2.17)	$ (5.16)
Numerator:
Net income (loss), basic	$ 1	$ (16)	$ (37)
Gain on extinguishment of debt, net of interest expense	(1)	0	0
Net income (loss), diluted	$ 0	$ (16)	$ (37)
Denominator:
Weighted-average shares outstanding, basic (in shares)	7,487	7,299	7,132
Weighted-average effect of diluted securities related to:
Employee share-based awards (in shares)	2,942	0	0
Convertible senior notes (in shares)	0	0	0
Assumed conversion of Class B to Class A common shares (in shares)	0	0	0
Number of shares used in diluted calculation	10,429	7,299	7,132
Net income (loss) per share, diluted (in dollars per share)	$ 0.06	$ (2.17)	$ (5.16)