Consolidated Statement of Changes in Shareholders' Equity Statement - USD ($) $ in Millions	Total	Ordinary Shares	Treasury Shares	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other Comprehensive Income (Loss), Net of Tax	$ (1.7)					$ (1.7)
Beginning balance, shares at Dec. 27, 2019		93,500,000	9,400,000
Beginning balance, value at Dec. 27, 2019	1,940.7	$ 18.7	$ (1,615.7)	$ 5,562.5	$ (2,016.9)	(7.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(944.6)				(944.6)
Vesting of restricted shares, shares		600,000	100,000
Vesting of restricted shares, value	0.5	$ (0.1)	$ 0.4	0.2
Share-based compensation	25.3			25.3
Ending balance, shares at Dec. 25, 2020		94,100,000	9,500,000
Ending balance, value at Dec. 25, 2020	1,019.2	$ 18.8	$ (1,616.1)	5,587.6	(2,961.5)	(9.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other Comprehensive Income (Loss), Net of Tax	1.3					1.3
Net loss	(717.4)				(717.4)
Vesting of restricted shares, shares		200,000	100,000
Vesting of restricted shares, value	(0.1)	$ (0.1)	$ 0.0	0.0
Share-based compensation	10.2			10.2
Ending balance, shares at Dec. 31, 2021		94,300,000	9,600,000
Ending balance, value at Dec. 31, 2021	313.4	$ 18.9	$ (1,616.1)	5,597.8	(3,678.9)	(8.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other Comprehensive Income (Loss), Net of Tax	(1.5)					(1.5)
Net loss	(313.1)				(313.1)
Share-based compensation	1.7			1.7
Cancellation of Predecessor equity	(0.5)	(18.9)	1,616.1	(5,599.5)	3,992.0	9.8
Cancellation of Predecessor equity, Shares		$ (94.3)	$ (9.6)
Ending balance, shares at Jun. 16, 2022		13,200,000	0
Ending balance, value at Jun. 16, 2022	2,203.6	$ 0.1	$ 0.0	2,203.5	0.0	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Shares, New Issues		13,200,000
Stock Issued During Period, Value, New Issues	2,189.7	$ 0.1		2,189.6
Adjustments to Additional Paid in Capital, Warrant Issued	13.9			13.9
Beginning balance, shares at Dec. 31, 2021		94,300,000	9,600,000
Beginning balance, value at Dec. 31, 2021	313.4	$ 18.9	$ (1,616.1)	5,597.8	(3,678.9)	(8.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted shares, value			$ 0.0
Ending balance, shares at Dec. 30, 2022		13,200,000	0
Ending balance, value at Dec. 30, 2022	1,613.7	$ 0.1	$ 0.0	2,191.0	(588.2)	10.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other Comprehensive Income (Loss), Net of Tax	10.8					10.8
Beginning balance, shares at Jun. 16, 2022		13,200,000	0
Beginning balance, value at Jun. 16, 2022	2,203.6	$ 0.1	$ 0.0	2,203.5	0.0	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(598.1)				(598.1)
Share-based compensation	1.4			1.4
Ending balance, shares at Dec. 30, 2022		13,200,000	0
Ending balance, value at Dec. 30, 2022	1,613.7	$ 0.1	$ 0.0	2,191.0	(588.2)	$ 10.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payments for Repurchase of Warrants	$ (4.0)			$ 13.9	$ (9.9)