CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Redeemable Noncontrolling Interest	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Balance, beginning of period at Dec. 26, 2021		$ 15.2
Redeemable Noncontrolling Interest
Net income (loss)		3.7
Acquisition of noncontrolling interest	$ 4.5	(7.7)		$ 4.5
Balance, end of period at Dec. 25, 2022		11.2
Balance, beginning of period (in shares) at Dec. 26, 2021			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	26.3			26.3
Issuance of common stock for employee stock purchase plan, options and stock awards (in shares)			500,000
Issuance of common stock for employee stock purchase plan, options and stock awards	6.2			6.2
Restricted stock issued and related taxes (in shares)			1,000,000.0
Restricted stock issued and related taxes	(12.5)			(12.5)
Issuance of common stock (in shares)			300,000
Issuance of common stock	5.0			5.0
Gain on interest rate swap contract	0.0
Net income (loss) from consolidated operations	(36.9)					(36.9)
Other comprehensive (loss) income, net of tax	(1.4)				(1.4)
Acquisition of noncontrolling interest (in shares)			200,000
Acquisition of noncontrolling interest	4.5	(7.7)		4.5
Balance, end of period (in shares) at Dec. 25, 2022			126,000,000.0
Balance, end of period at Dec. 25, 2022	936.3		$ 0.0	1,608.4	(0.8)	(671.3)
Redeemable Noncontrolling Interest
Net income (loss)		11.3
Acquisition of noncontrolling interest	3.2			3.2
Balance, end of period at Dec. 31, 2023		22.5
Increase (Decrease) in Stockholders' Equity
Stock-based compensation	25.3			25.3
Issuance of common stock for employee stock purchase plan, options and stock awards (in shares)			800,000
Issuance of common stock for employee stock purchase plan, options and stock awards	6.5			6.5
Restricted stock issued and related taxes (in shares)			700,000
Restricted stock issued and related taxes	(3.7)			(3.7)
Issuance of common stock (in shares)			1,000,000.0
Issuance of common stock	14.8			14.8
Gain on interest rate swap contract	0.7				0.7
Net income (loss) from consolidated operations	(8.9)					(8.9)
Other comprehensive (loss) income, net of tax	1.8				1.8
Acquisition of noncontrolling interest (in shares)			800,000
Acquisition of noncontrolling interest	$ 3.2			3.2
Balance, end of period (in shares) at Dec. 31, 2023	129,286,964		129,300,000
Balance, end of period at Dec. 31, 2023	$ 976.0		$ 0.0	1,654.5	1.7	(680.2)
Redeemable Noncontrolling Interest
Acquisition of noncontrolling interest	11.3	(22.5)		11.3
Balance, end of period at Dec. 29, 2024		0.0
Increase (Decrease) in Stockholders' Equity
Stock-based compensation	29.8			29.8
Issuance of common stock for employee stock purchase plan, options and stock awards (in shares)			600,000
Issuance of common stock for employee stock purchase plan, options and stock awards	8.2			8.2
Restricted stock issued and related taxes (in shares)			1,400,000
Restricted stock issued and related taxes	(17.4)			(17.4)
Issuance of common stock (in shares)			19,200,000
Issuance of common stock	330.7		$ 0.2	330.5
Issuance of common stock for acquisitions	0.5			0.5
Gain on interest rate swap contract	0.1				0.1
Net income (loss) from consolidated operations	16.3					16.3
Other comprehensive (loss) income, net of tax	(2.3)				(2.3)
Acquisition of noncontrolling interest (in shares)			600,000
Acquisition of noncontrolling interest	$ 11.3	$ (22.5)		11.3
Balance, end of period (in shares) at Dec. 29, 2024	151,092,292		151,100,000
Balance, end of period at Dec. 29, 2024	$ 1,353.2		$ 0.2	$ 2,017.4	$ (0.5)	$ (663.9)