Consolidated Statements of Changes in Redeemable Preferred and Common Units and Equity (Deficit) - USD ($) $ in Thousands	Total	Previously Reported	Common Units, Class C	Common Units, Class C Previously Reported	Common Units, Class C Revision of Prior Period, Adjustment	[1]	Preferred Units, Class B-1	Preferred Units, Class B-1 Previously Reported	Preferred Units, Class B-1 Revision of Prior Period, Adjustment	[1]	Preferred Units, Class B	Preferred Units, Class B Previously Reported	Preferred Units, Class B Revision of Prior Period, Adjustment	[1]	Class A Common Stock	Common Stock Common Voting Units, Class A	Common Stock Common Voting Units, Class A Previously Reported	Common Stock Common Voting Units, Class A Revision of Prior Period, Adjustment	[1]	Common Stock Class A Common Stock	Common Stock Class A Common Stock Previously Reported	Common Stock Class V-1 Common Stock	Common Stock Class V-1 Common Stock Previously Reported	Common Stock Class V-3 Common Stock	Common Stock Class V-3 Common Stock Previously Reported	Additional Paid-In Capital - Warrants	Additional Paid-In Capital - Warrants Previously Reported	Additional Paid-In Capital	Additional Paid-In Capital Previously Reported	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Previously Reported	Accumulated Deficit	Accumulated Deficit Previously Reported	Noncontrolling Interest	Noncontrolling Interest Previously Reported
Beginning balance (in shares) at Sep. 25, 2021			24,922,109	428,571	24,493,538		24,041,300	1	24,041,299		47,508,300	1	47,508,299
Beginning balance at Sep. 25, 2021			$ 144,975	$ 144,975			$ 232,278	$ 232,278			$ 459,007	$ 459,007
Redeemable Preferred and Common Units
Granted (in shares)			1,052,952
Forfeited (in shares)			(1,052,952)
Unit-based compensation			$ 52
Accretion of Class C Units to redemption value			$ 28,433
Preferred return							$ 8,130				$ 16,065
Recapitalization of Preferred Units, Class C Units, Class A Voting Units, and creation of NVI (net of transaction costs) (in shares)			(24,922,109)				(24,041,300)				(47,508,300)
Recapitalization of Preferred Units, Class C Units, Class A Voting Units, and creation of NCI (net of transaction costs)			$ (173,460)				$ (240,408)				$ (475,072)
Ending balance (in shares) at Sep. 24, 2022			0				0				0
Ending balance at Sep. 24, 2022			$ 0				$ 0				$ 0
Beginning balance (in shares) at Sep. 25, 2021																367,548,946	5,997,632	361,551,314			0		0		0
Beginning balance at Sep. 25, 2021	$ (1,113,228)	$ (1,113,228)														$ 16,809	$ 16,809				$ 0		$ 0		$ 0	$ 26,999	$ 26,999	$ 0	$ 0	$ (2,092)	$ (2,092)	$ (1,154,944)	$ (1,154,944)	$ 0	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(139,089)
Accretion of Class C Units to redemption value	(28,433)																															(28,433)
Preferred return	(24,195)																															(24,195)
Issuance of common stock under stock plans (in shares)																				1,831,505
Issuance of common stock under stock plans	0																											219						(219)
Issuance of sponsor shares (in shares																				3,616,000
Issuance of sponsor shares	0																											431						(431)
Issuance of earnout units upon triggering event (in shares)																						20,000,000
Issuance of earnout units upon triggering event	0																					$ 2						(258)						256
Exchange of Class V-1 and Class V-3 common stock (in shares)																				1,607,185		(1,607,185)
Exchange of Class V-1 and Class V-3 common stock	0																											212						(212)
Stock-based compensation	26,807																											2,794						24,013
Additional paid-in capital adjustment resulting from VAP Unit modification	23,750																											2,475						21,275
Provision for warrants	74,280																									74,280
Exercise of warrants (in shares)																43,756,942
Exercise of warrants	277,776															$ 320,929										(43,153)
Recapitalization of Preferred Units, Class C Units, Class A Voting Units, and creation of NCI (net of transaction costs) (in shares)																(411,305,888)						60,844,573		416,933,025
Recapitalization of Preferred units, Class C Units, Class A Voting Units, and creation of NCI (net of transaction costs)	551,904															$ (337,738)						$ 6		$ 42				1,191,567						(301,973)
Recapitalization of SVF equity, PIPE, and FPA (net of transaction costs) (in shares)																				50,664,146
Recapitalization of SVF equity, PIPE, and FPA (net of transaction costs)	421,706																			$ 5								40,425						381,276
Other comprehensive loss pre business combination	(2,338)
Ending balance (in shares) at Sep. 24, 2022																0				57,718,836		79,237,388		416,933,025
Ending balance at Sep. 24, 2022	68,940															$ 0				$ 6		$ 8		$ 42		58,126		1,237,865		(2,294)		(1,286,569)		61,756
Ending balance (in shares) at Sep. 30, 2023			0				0				0
Ending balance at Sep. 30, 2023			$ 0				$ 0				$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(207,894)																															(23,866)		(184,028)
Issuance of common stock under stock plans (in shares)																				2,825,576
Issuance of common stock under stock plans	$ (26,498)																											(3,337)						(23,161)
Issuance of common stock under employee stock purchase plan, net of shares withheld for employee taxes (in shares)	225,788																			225,788
Issuance of common stock under employee stock purchase plan, net of shares withheld for employee taxes	$ 795																											91						704
Exchange of Class V-1 and Class V-3 common stock (in shares)																				21,342,681		(11,938,597)		(9,404,084)
Exchange of Class V-1 and Class V-3 common stock	$ 0																			$ 2		$ (1)		$ (1)				956						(956)
Cancellation of Class V-1 common stock (in shares)	(367,694)														0							(367,694)
Issuance of common stock in connection with equity offering (in shares)	3,051,364														3,051,364
Stock-based compensation	$ 156,728																											18,447						138,281
Other comprehensive loss pre business combination	5,213																													607				4,606
Ending balance (in shares) at Sep. 30, 2023																0				82,112,881		66,931,097		407,528,941
Ending balance at Sep. 30, 2023	(2,716)															$ 0				$ 8		$ 7		$ 41		58,126		1,254,022		(1,687)		(1,310,435)		(2,798)
Ending balance (in shares) at Sep. 28, 2024			0				0				0
Ending balance at Sep. 28, 2024			$ 0				$ 0				$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(84,672)																															(13,490)		(71,182)
Issuance of common stock under stock plans (in shares)																				6,790,081
Issuance of common stock under stock plans	$ (3,152)																			$ 1								(3,103)						(50)
Issuance of common stock under employee stock purchase plan, net of shares withheld for employee taxes (in shares)	230,548																			230,548
Issuance of common stock under employee stock purchase plan, net of shares withheld for employee taxes	$ 5,465																											5,465
Exchange of Class V-1 and Class V-3 common stock (in shares)																				9,055,867		(5,836,122)		(3,219,745)
Exchange of Class V-1 and Class V-3 common stock	$ (1)																			$ 3		$ (3)		$ (1)				(9,747)						9,747
Cancellation of Class V-1 common stock (in shares)	0														0
Issuance of common stock in connection with equity offering (in shares)	29,391,040														13,520,629					6,500,000
Issuance of common stock in connection with equity offering	$ 257,986																			$ 1								257,985
Distributions to Symbotic Holdings LLC partners	(48,413)																																	(48,413)
Stock-based compensation	112,484																											19,070						93,414
Exercise of warrants (in shares)																						15,870,411
Exercise of warrants	158,705																					$ 3				(58,126)								216,828
Other comprehensive loss pre business combination	(5,556)																													(907)				(4,649)
Ending balance (in shares) at Sep. 28, 2024																0				104,689,377		76,965,386		404,309,196
Ending balance at Sep. 28, 2024	$ 390,130															$ 0				$ 13		$ 7		$ 40		$ 0		$ 1,523,692		$ (2,594)		$ (1,323,925)		$ 192,897

[1] As part of the Business Combination (as disclosed in Note 4, Mergers and Acquisitions and Note 19, Equity), all per share information has been retroactively adjusted using the Exchange Ratio as stipulated by the Merger Agreement