Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

Name:	us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

Fresh Start Accounting - Reorganization of Balance Sheet (Details) - USD ($) shares in Thousands, $ in Millions	Sep. 29, 2025	Dec. 28, 2025	Sep. 30, 2025	Sep. 28, 2025	Jun. 29, 2025	Dec. 29, 2024	Sep. 29, 2024	Jun. 30, 2024
Current assets:
Cash and cash equivalents (includes restricted cash)	$ 481.0	$ 1,028.8			$ 467.2	$ 614.0		$ 1,045.9
Short-term investments	354.4	263.5			488.2
Total cash, cash equivalents and short-term investments	835.4	1,292.3			955.4
Accounts receivable, net	155.6	108.3			178.8
Inventories, net	392.3	320.1			435.4
Prepaid expenses	71.8	52.3			97.2
Investment tax credit receivable	654.0	72.5			653.4
Other current assets	119.9	87.1			222.0
Total current assets	2,229.0	1,932.6			2,542.2
Property and equipment, net	769.2	770.3			3,916.5
Intangible assets, net	445.7	426.8			23.8
Long-term investment tax credit receivable	181.3	109.5			105.0
Other assets	212.9	205.9			266.9
Total assets	3,838.1	3,445.1			6,854.4
Current liabilities:
Accounts payable and accrued expenses	206.8	160.4			280.2
Contract liabilities and distributor-related reserves	72.9	76.6			50.0
Income taxes payable	0.9	0.8			0.8
Finance lease liabilities	0.6	0.5			0.5
Other current liabilities	59.8	58.8			220.5
Total current liabilities	341.0	297.1			7,090.0
Long-term liabilities:
Long-term debt	1,609.0	1,430.2			0.0
Convertible notes, net	539.7	533.5			0.0
Finance lease liabilities - long-term	1.9	1.8			8.4
Long-term warrant	33.6	34.2			0.0
Forward equity contract	371.1	302.5			0.0
Other long-term liabilities	184.7	218.4			203.1
Liabilities subject to compromise	0.0
Total liabilities	3,081.0	2,817.7			7,301.5
Commitments and contingencies
Stockholders’ equity:
Common stock		0.0			0.2
Additional paid-in-capital		777.6			4,094.1
Accumulated other comprehensive income (loss)	0.0	0.4			(3.8)
Accumulated deficit	0.0	(150.6)			(4,537.6)
Total stockholders' equity	757.1	627.4	$ 757.1	$ (1,080.4)	(447.1)	$ 372.6	$ 628.9	$ 882.1
Total liabilities and stockholders’ equity	3,838.1	$ 3,445.1			$ 6,854.4
Restricted cash	28.3
Common stock issued (in shares)		27,365			155,643
Reorganization, Sucessor
Stockholders’ equity:
Common stock	0.0
Additional paid-in-capital	757.1
Predecessor
Current assets:
Cash and cash equivalents (includes restricted cash)	571.6
Short-term investments	354.4
Total cash, cash equivalents and short-term investments	926.0
Accounts receivable, net	155.6
Inventories, net	385.5
Prepaid expenses	75.5
Investment tax credit receivable	654.0
Other current assets	118.3
Total current assets	2,314.9
Property and equipment, net	3,775.8
Intangible assets, net	24.2
Long-term investment tax credit receivable	181.3
Other assets	254.9
Total assets	6,551.1
Current liabilities:
Accounts payable and accrued expenses	196.5
Contract liabilities and distributor-related reserves	72.9
Income taxes payable	0.9
Finance lease liabilities	0.0
Other current liabilities	29.3
Total current liabilities	299.6
Long-term liabilities:
Long-term debt	0.0
Convertible notes, net	0.0
Finance lease liabilities - long-term	0.0
Long-term warrant	0.0
Forward equity contract	0.0
Other long-term liabilities	16.6
Liabilities subject to compromise	7,315.3
Total liabilities	7,631.5
Commitments and contingencies
Stockholders’ equity:
Common stock	0.2
Additional paid-in-capital	4,103.6
Accumulated other comprehensive income (loss)	(3.0)
Accumulated deficit	(5,181.2)
Total stockholders' equity	(1,080.4)
Total liabilities and stockholders’ equity	6,551.1
Reorganization Adjustments
Current assets:
Cash and cash equivalents (includes restricted cash)	(90.6)
Short-term investments	0.0
Total cash, cash equivalents and short-term investments	(90.6)
Accounts receivable, net	0.0
Inventories, net	0.0
Prepaid expenses	(3.6)
Investment tax credit receivable	0.0
Other current assets	0.0
Total current assets	(94.2)
Property and equipment, net	0.0
Intangible assets, net	0.0
Long-term investment tax credit receivable	0.0
Other assets	0.0
Total assets	(94.2)
Current liabilities:
Accounts payable and accrued expenses	10.3
Contract liabilities and distributor-related reserves	0.0
Income taxes payable	0.0
Finance lease liabilities	0.6
Other current liabilities	26.1
Total current liabilities	37.0
Long-term liabilities:
Long-term debt	1,609.0
Convertible notes, net	539.7
Finance lease liabilities - long-term	8.3
Long-term warrant	33.6
Forward equity contract	371.1
Other long-term liabilities	201.5
Liabilities subject to compromise	(7,315.3)
Total liabilities	(4,515.1)
Commitments and contingencies
Stockholders’ equity:
Common stock	(0.2)
Additional paid-in-capital	(4,103.6)
Accumulated other comprehensive income (loss)	0.0
Accumulated deficit	7,767.6
Total stockholders' equity	4,420.9
Total liabilities and stockholders’ equity	(94.2)
Accrued success fees, current	16.8
Payments for accrued lender professional fees	$ 6.5
Common stock issued (in shares)	25,800
Reorganization Adjustments \| Reorganization, Sucessor
Stockholders’ equity:
Common stock	$ 0.0
Additional paid-in-capital	757.1
Fresh-Start Adjustments
Current assets:
Cash and cash equivalents (includes restricted cash)	0.0
Short-term investments	0.0
Total cash, cash equivalents and short-term investments	0.0
Accounts receivable, net	0.0
Inventories, net	6.8
Prepaid expenses	(0.1)
Investment tax credit receivable	0.0
Other current assets	1.6
Total current assets	8.3
Property and equipment, net	(3,006.6)
Intangible assets, net	421.5
Long-term investment tax credit receivable	0.0
Other assets	(42.0)
Total assets	(2,618.8)
Current liabilities:
Accounts payable and accrued expenses	0.0
Contract liabilities and distributor-related reserves	0.0
Income taxes payable	0.0
Finance lease liabilities	0.0
Other current liabilities	4.4
Total current liabilities	4.4
Long-term liabilities:
Long-term debt	0.0
Convertible notes, net	0.0
Finance lease liabilities - long-term	(6.4)
Long-term warrant	0.0
Forward equity contract	0.0
Other long-term liabilities	(33.4)
Liabilities subject to compromise	0.0
Total liabilities	(35.4)
Commitments and contingencies
Stockholders’ equity:
Common stock	0.0
Additional paid-in-capital	0.0
Accumulated other comprehensive income (loss)	3.0
Accumulated deficit	(2,586.4)
Total stockholders' equity	(2,583.4)
Total liabilities and stockholders’ equity	(2,618.8)
Fresh-Start Adjustments \| Reorganization, Sucessor
Stockholders’ equity:
Common stock	0.0
Additional paid-in-capital	$ 0.0