CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Millions	Total	Redeemable Noncontrolling Interest	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income	Accumulated Deficit
Balance, beginning of period at Dec. 27, 2020		$ 14.8
Balance, end of period at Mar. 28, 2021		14.8
Balance, beginning of period (in shares) at Dec. 27, 2020			123,000,000.0
Balance, beginning of period at Dec. 27, 2020	$ 925.3		$ 0.0	$ 1,556.3	$ 1.4	$ (632.4)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation	6.2			6.2
Issuance of common stock for employee stock purchase plan and stock options (in shares)			200,000
Issuance of common stock for employee stock purchase plan and stock options	2.5			2.5
Restricted stock issued and related taxes (in shares)			500,000
Restricted stock issued and related taxes	(7.1)			(7.1)
Net income (loss)	1.9					1.9
Other comprehensive income, net of tax	0.2				0.2
Balance, end of period (in shares) at Mar. 28, 2021			123,700,000
Balance, end of period at Mar. 28, 2021	$ 929.0		$ 0.0	1,557.9	1.6	(630.5)
Balance, beginning of period at Dec. 26, 2021		15.2
Balance, end of period at Mar. 27, 2022		$ 15.2
Balance, beginning of period (in shares) at Dec. 26, 2021	123,987,424		124,000,000.0
Balance, beginning of period at Dec. 26, 2021	$ 945.1		$ 0.0	1,578.9	0.6	(634.4)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation	7.0			7.0
Issuance of common stock for employee stock purchase plan and stock options (in shares)			200,000
Issuance of common stock for employee stock purchase plan and stock options	2.9			2.9
Restricted stock issued and related taxes (in shares)			600,000
Restricted stock issued and related taxes	(6.8)			(6.8)
Net income (loss)	(15.9)					(15.9)
Other comprehensive income, net of tax	$ 0.0
Balance, end of period (in shares) at Mar. 27, 2022	124,825,355		124,800,000
Balance, end of period at Mar. 27, 2022	$ 932.3		$ 0.0	$ 1,582.0	$ 0.6	$ (650.3)