Earnings (Loss) Per Share - Summary of Weighted-average Potentially Dilutive Securities Excluded from Diluted Net Loss Per Share (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive impact (in shares)	19,095,916	37,887,053	31,027,427	1,226,215
Conversion of Class B and Class C common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive impact (in shares)	10,624,863	27,535,479	23,029,148	0
Stock options of Clearwater Analytics Holdings, Inc.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive impact (in shares)	5,072,204	9,010,390	5,341,159	867,859
RSUs of Clearwater Analytics Holdings, Inc.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive impact (in shares)	3,381,518	1,185,552	2,622,395	358,356
Employee stock purchase plans
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive impact (in shares)	17,331	155,632	34,725	0