Consolidated Statements of Comprehensive Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 25, 2020	Dec. 27, 2019
Currency translation adjustments	$ (0.5)	$ 2.1	$ 18.3
Net loss	(717.4)	(944.6)	(996.5)
Unrecognized gain on derivatives	0.0	0.4	1.8
Unrecognized gain (loss) on benefit plans	1.8	(4.2)	(4.2)
Total other comprehensive income (loss), net of tax	1.3	(1.7)	15.9
Comprehensive loss	(716.1)	(946.3)	(980.6)
Other comprehensive income (loss), net of tax
Currency translation adjustments	(0.5)	2.1	18.3
Unrecognized gain (loss) on benefit plans	1.8	(4.2)	(4.2)
Unrecognized gain on derivatives	0.0	0.4	1.8
Total other comprehensive income (loss), net of tax	1.3	(1.7)	15.9
Comprehensive loss	(716.1)	(946.3)	(980.6)
Retained Earnings
Net loss	$ (717.4)	$ (944.6)	$ (996.5)