Consolidated Statements of Comprehensive Operations - USD ($) $ in Millions	1 Months Ended	6 Months Ended		11 Months Ended	12 Months Ended
	Dec. 29, 2023	Dec. 30, 2022	Jun. 16, 2022	Nov. 14, 2023	Dec. 31, 2021
Currency translation adjustments	$ 5.2	$ 2.1	$ (1.5)	$ (5.3)	$ (0.5)
Net loss	(38.2)	(598.1)	(313.1)	(1,631.3)	(717.4)
Unrecognized loss on derivatives	0.0	0.0	0.0	5.7	0.0
Unrecognized (loss) gain on benefit plans	(1.6)	8.7	0.0	(0.8)	1.8
Total other comprehensive income (loss), net of tax	3.6	10.8	(1.5)	(0.4)	1.3
Comprehensive loss	(34.6)	(587.3)	(314.6)	(1,631.7)	(716.1)
Other comprehensive income (loss), net of tax
Currency translation adjustments	5.2	2.1	(1.5)	(5.3)	(0.5)
Unrecognized (loss) gain on benefit plans	(1.6)	8.7	0.0	(0.8)	1.8
Unrecognized loss on derivatives	0.0	0.0	0.0	5.7	0.0
Total other comprehensive income (loss), net of tax	3.6	10.8	(1.5)	(0.4)	1.3
Comprehensive loss	(34.6)	(587.3)	(314.6)	(1,631.7)	(716.1)
Retained Earnings
Net loss	$ (38.2)	$ (598.1)	$ (313.1)	$ (1,631.3)	$ (717.4)