Consolidated Statements of Changes in Shareholders' Equity (Deficit) (Unaudited) - USD ($) $ in Millions	Total	Foreign Currency Derivatives	Interest Rate Derivatives	Ordinary Shares	Preferred Redeemable Shares	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Foreign Currency Derivatives	Accumulated Other Comprehensive Loss Interest Rate Derivatives
Beginning balance at Dec. 29, 2019	$ (812.8)			$ 0.0	$ 0.0	$ 964.7	$ (1,705.6)	$ (71.9)
Beginning balance, shares at Dec. 29, 2019				146,437,546	0
Net loss	(142.5)						(142.5)
Exercise of stock options	0.2					0.2
Exercise of stock options, shares				122,776
Recognition of stock-based compensation	3.8					3.8
Derivatives, net of tax of $0.0		$ 1.2	$ (50.0)						$ 1.2	$ (50.0)
Foreign currency translation adjustments	(6.4)							(6.4)
Ending balance at Jun. 28, 2020	(1,006.5)			$ 0.0	$ 0.0	968.7	(1,848.1)	(127.1)
Ending balance, shares at Jun. 28, 2020				146,560,322	0
Beginning balance at Mar. 29, 2020	(962.0)			$ 0.0	$ 0.0	966.5	(1,806.8)	(121.7)
Beginning balance, shares at Mar. 29, 2020				146,526,769	0
Net loss	(41.3)						(41.3)
Exercise of stock options, shares				33,553
Recognition of stock-based compensation	2.2					2.2
Derivatives, net of tax of $0.0		(3.7)	(6.1)						(3.7)	(6.1)
Foreign currency translation adjustments	4.4							4.4
Ending balance at Jun. 28, 2020	(1,006.5)			$ 0.0	$ 0.0	968.7	(1,848.1)	(127.1)
Ending balance, shares at Jun. 28, 2020				146,560,322	0
Beginning balance at Jan. 03, 2021	(1,010.8)			$ 0.0	$ 0.0	975.1	(1,917.5)	(68.4)
Beginning balance, shares at Jan. 03, 2021				147,295,511	0
Ending balance at Apr. 04, 2021	376.6			$ 0.0	$ 0.1	2,394.3	(1,956.6)	(61.2)
Ending balance, shares at Apr. 04, 2021				234,843,052	50,000
Beginning balance at Jan. 03, 2021	(1,010.8)			$ 0.0	$ 0.0	975.1	(1,917.5)	(68.4)
Beginning balance, shares at Jan. 03, 2021				147,295,511	0
Net loss	(59.1)						(59.1)
Issuance of ordinary shares upon completion of initial public offering, net of commissions, underwriting discounts and offering costs	1,415.2					1,415.2
Issuance of ordinary shares upon completion of initial public offering, net of commissions, underwriting discounts and offering costs, shares				87,400,000
Issuance of incorporation shares consisting of ordinary share and preferred redeemable shares	0.1				$ 0.1
Issuance of incorporation shares consisting of ordinary shares and preferred redeemable shares, shares				1	50,000
Exercise of stock options	2.2					2.2
Exercise of stock options, shares				225,490
Recognition of stock-based compensation	14.5					14.5
Derivatives, net of tax of $0.0		4.3	16.8						4.3	16.8
Foreign currency translation adjustments	(7.7)							(7.7)
Ending balance at Jul. 04, 2021	375.6			$ 0.0	$ 0.1	2,407.0	(1,976.6)	(54.9)
Ending balance, shares at Jul. 04, 2021				234,921,002	50,000
Beginning balance at Apr. 04, 2021	376.6			$ 0.0	$ 0.1	2,394.3	(1,956.6)	(61.2)
Beginning balance, shares at Apr. 04, 2021				234,843,052	50,000
Net loss	(20.0)						(20.0)
Adjustments of offering costs related to initial public offering	0.4					0.4
Exercise of stock options	1.2					1.2
Exercise of stock options, shares				77,950
Recognition of stock-based compensation	11.0					11.0
Derivatives, net of tax of $0.0		$ 0.7	$ 4.4						$ 0.7	$ 4.4
Foreign currency translation adjustments	1.1							1.1
Ending balance at Jul. 04, 2021	$ 375.6			$ 0.0	$ 0.1	$ 2,407.0	$ (1,976.6)	$ (54.9)
Ending balance, shares at Jul. 04, 2021				234,921,002	50,000