Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2022	Mar. 26, 2021
Net loss	$ (119.6)	$ (143.9)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0.0	0.1
Net loss	(119.6)	(143.9)
Other comprehensive income, net of tax:
Currency translation adjustments	0.2	0.2
Benefit plans, net of tax	(0.2)	(0.1)
Total other comprehensive income, net of tax	0.0	0.1
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	(119.6)	(143.8)
Retained Earnings (Deficit)
Net loss	(119.6)	(143.9)
Net loss	$ (119.6)	$ (143.9)