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DEI - USD ($)	12 Months Ended
	Sep. 29, 2018	Nov. 16, 2018	Mar. 31, 2018
Document Information [Abstract]
Entity Registrant Name	Sonos Inc
Entity Central Index Key	0001314727
Current Fiscal Year End Date	--09-29
Entity Filer Category	Non-accelerated Filer
Document Type	10-K
Document Period End Date	Sep. 29, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity common stock, shares outstanding		100,947,974
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 0

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Document Information [Abstract]

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