Condensed Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 01, 2022	Jun. 16, 2022	Jun. 25, 2021	Jun. 16, 2022	Jun. 25, 2021
Net sales	$ 85.0	$ 383.7	$ 546.4	$ 874.6	$ 1,104.4
Cost of sales	102.2	266.8	331.6	582.0	639.2
Gross (loss) profit	(17.2)	116.9	214.8	292.6	465.2
Selling, general and administrative expenses	30.3	122.8	145.0	275.3	281.0
Research and development expenses	6.2	28.3	52.8	65.5	119.0
Restructuring charges, net	1.1	2.8	6.1	9.6	6.5
Non-restructuring impairment charges	0.0			0.0	64.5
Losses on divestiture	0.0			0.0	0.8
Operating (loss) income	(54.8)	(37.0)	10.9	(57.8)	(6.6)
Interest expense	21.1	50.4	52.4	108.6	112.0
Interest income	(0.1)	(0.2)	0.0	(0.6)	(1.9)
Other income (expense), net	5.9	(10.5)	11.3	(14.6)	19.4
Reorganization items, net	(3.5)	(587.5)	(109.5)	(630.9)	(203.0)
Loss from continuing operations before income taxes	(73.4)	(685.2)	(139.7)	(811.3)	(300.3)
Income tax benefit	(9.7)	(491.4)	(33.5)	(497.3)	(49.9)
Loss from continuing operations	(63.7)	(193.8)	(106.2)	(314.0)	(250.4)
Income from discontinued operations, net of income taxes	0.0	0.3	0.4	$ 0.9	$ 0.7
Net loss	$ (63.7)	$ (193.5)	$ (105.8)
Basic (loss) income per share (Note 7):
Loss from continuing operations	$ (4.83)	$ (2.29)	$ (1.25)	$ (3.70)	$ (2.96)
Income from discontinued operations	0	0	0	0.01	0.01
Net loss	$ (4.83)	$ (2.28)	$ (1.25)	$ (3.69)	$ (2.95)
Basic weighted-averaged shares outstanding (in shares)	13.2	84.8	84.7	84.8	84.7
Diluted (loss) income per share (Note 7):
Loss from continuing operations	$ (4.83)	$ (2.29)	$ (1.25)	$ (3.70)	$ (2.96)
Income from discontinued operations	0	0	0	0.01	0.01
Net loss	$ (4.83)	$ (2.28)	$ (1.25)	$ (3.69)	$ (2.95)
Diluted weighted-average shares outstanding (in shares)	13.2	84.8	84.7	84.8	84.7
Retained Earnings (Deficit)
Net loss	$ (63.7)	$ (193.5)	$ (105.8)	$ (313.1)	$ (249.7)