Summary of Significant Accounting Policies - Narrative (Details)			1 Months Ended		12 Months Ended
	May 20, 2022 USD ($) shares	Apr. 30, 2021 $ / shares shares	Dec. 30, 2023 USD ($)	Dec. 31, 2021 USD ($)	Sep. 28, 2024 USD ($) segment $ / shares shares	Sep. 30, 2023 USD ($) shares	Sep. 24, 2022 USD ($)	Mar. 28, 2024 USD ($) $ / shares	Jul. 23, 2023 $ / shares shares	Jun. 07, 2022 shares
Product Information [Line Items]
Foreign currency losses (gains) | $					$ (8,000)	$ (3,000)	$ 25,000
Net cash savings, percentage					85.00%
Number of operating segments | segment					1
Allowance for doubtful accounts | $					$ 0	0	0
Accounts receivable, payment period					30 days
Property and equipment, per unit value threshold | $					$ 2,000,000
Property and equipment, useful life, threshold					1 year
Asset impairment charges | $					$ 0	$ 100,000	0
Common stock, value, outstanding | $								$ 1,934,000,000
Share price (in dollars per share) | $ / shares								$ 45.00
GreenBox Warrants
Product Information [Line Items]
Warrants authorized (in shares)									11,434,360
Exercise price of warrants or rights (in dollars per share) | $ / shares									$ 41.9719
Warrants
Product Information [Line Items]
Exercise price of warrants or rights (in dollars per share) | $ / shares		$ 389.03
Warrants, vested (in shares)					0	258,972
Warrants | Tranche One
Product Information [Line Items]
Percentage of outstanding and issuable		6.50%
Warrants, vested (in shares)		446,741
Warrants | Tranche Two
Product Information [Line Items]
Percentage of outstanding and issuable		3.50%
Warrants, vested (in shares)		267,281
Warrants | Class A Units
Product Information [Line Items]
Warrants authorized (in shares)		714,022
May 2022 Warrants
Product Information [Line Items]
Exercise price of warrants or rights (in dollars per share) | $ / shares					$ 10.00
May 2022 Warrants | Class A Units
Product Information [Line Items]
Warrants authorized (in shares)	258,972				258,972
Percentage of warrants, vested, maximum					3.60%
June 2022 Warrants
Product Information [Line Items]
Warrants authorized (in shares)					15,870,411					15,870,411
Warrants, vested (in shares)					15,870,411
Walmart Warrants
Product Information [Line Items]
Exercise price of warrants or rights (in dollars per share) | $ / shares		$ 389.03
Percentage of outstanding and issuable	10.00%			6.50%
Warrants, exercised, value | $	$ 104,000,000.0		$ 158,700,000	$ 173,800,000
Walmart Warrants | Tranche One
Product Information [Line Items]
Percentage of outstanding and issuable		6.50%
Warrants, vested (in shares)		446,741
Walmart Warrants | Tranche Two
Product Information [Line Items]
Percentage of outstanding and issuable		3.50%
Warrants, vested (in shares)		267,281
Walmart Warrants | Class A Units
Product Information [Line Items]
Warrants authorized (in shares)		714,022
Warrants, vested (in shares)	267,281
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-09-29
Product Information [Line Items]
Remaining performance obligation, period					12 months
Software Maintenance and Support Contracts | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-09-29
Product Information [Line Items]
Remaining performance obligation, period					15 years
Two Suppliers | Cost of Goods and Service Benchmark | Supplier Concentration Risk
Product Information [Line Items]
Volume of purchases | $					$ 343,000,000.0
One Supplier | Cost of Goods and Service Benchmark | Supplier Concentration Risk
Product Information [Line Items]
Volume of purchases | $						$ 164,800,000
Maximum
Product Information [Line Items]
Foreign currency losses (gains) | $					$ 100,000	$ 100,000	$ 100,000
Remaining performance obligation, period					15 years
Maximum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-09-28
Product Information [Line Items]
Remaining performance obligation, period					5 years
Minimum
Product Information [Line Items]
Remaining performance obligation, period					1 year
Minimum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-09-28
Product Information [Line Items]
Remaining performance obligation, period					1 year