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Cover - USD ($) $ in Millions	12 Months Ended
Cover - USD ($) $ in Millions	Feb. 01, 2025	Mar. 18, 2025	Aug. 02, 2024
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Feb. 01, 2025
Current Fiscal Year End Date	--02-01
Document Transition Report	false
Entity File Number	001-41140
Entity Registrant Name	SAMSARA INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	47-3100039
Entity Address, Address Line One	1 De Haro Street
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94107
City Area Code	415
Local Phone Number	985-2400
Title of 12(b) Security	Class A Common Stock, $0.0001 par value per share
Trading Symbol	IOT
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction	false
Entity Shell Company	false
Entity Public Float			$ 9,247.8
Entity Central Index Key	0001642896
Amendment Flag	false
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	FY
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement for the registrant’s annual meeting of stockholders are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated. Such definitive proxy statement will be filed with the Securities and Exchange Commission no later than 120 days after the end of the registrant’s fiscal year ended February 1, 2025.
Common Class A
Cover [Abstract]
Entity Common Stock, Shares Outstanding		299,733,309
Common Class B
Cover [Abstract]
Entity Common Stock, Shares Outstanding		269,587,022
Common Class C
Cover [Abstract]
Entity Common Stock, Shares Outstanding		0