Net Loss Per Share Attributable to Common Stockholders - Computation of Basic and Diluted Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
Numerator:
Net loss attributable to Class A and Class B CrowdStrike common stockholders	$ (50,455)	$ (24,531)	$ (192,822)	$ (73,627)
Denominator:
Weighted-average shares used in computing net loss per share attributable to Crowdstrike, basic (in shares)	228,293	219,401	226,292	216,432
Weighted-average shares used in computing net loss per share attributable to Crowdstrike, diluted (in shares)	228,293	219,401	226,292	216,432
Net loss per share attributable to Crowdstrike, basic (in dollars per share)	$ (0.22)	$ (0.11)	$ (0.85)	$ (0.34)
Net loss per share attributable to Crowdstrike, diluted (in dollars per share)	$ (0.22)	$ (0.11)	$ (0.85)	$ (0.34)