Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings (Deficit)	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 29, 2019		133.6
Beginning balance at Dec. 29, 2019	$ (137.2)	$ 1.3	$ 3.5	$ (127.1)	$ (14.9)
Increase (Decrease) in Stockholders' Equity
Net income	44.7			44.7
Foreign currency translation gain (loss)	(7.6)				(7.6)
Stock-based compensation expense	2.1		2.1
Common stock issued for the exercise and vesting of stock-based awards (in shares)		0.3
Common stock issued for the exercise and vesting of stock-based awards	0.8		0.8
Withholding taxes on stock-based awards	(6.4)		(6.4)
Ending balance (in shares) at Mar. 29, 2020		133.9
Ending balance at Mar. 29, 2020	$ (103.6)	$ 1.3	0.0	(82.4)	(22.5)
Beginning balance (in shares) at Dec. 27, 2020	134.5	134.5
Beginning balance at Dec. 27, 2020	$ 69.4	$ 1.3	12.0	67.7	(11.6)
Increase (Decrease) in Stockholders' Equity
Net income	72.5			72.5
Foreign currency translation gain (loss)	3.0				3.0
Stock-based compensation expense	2.8		2.8
Common stock issued for the exercise and vesting of stock-based awards (in shares)		0.4
Common stock issued for the exercise and vesting of stock-based awards	0.1		0.1
Common stock issued for employee stock purchase plan	0.4		0.4
Withholding taxes on stock-based awards (in shares)		(0.1)
Withholding taxes on stock-based awards	$ (6.0)		(6.0)
Ending balance (in shares) at Mar. 28, 2021	134.8	134.8
Ending balance at Mar. 28, 2021	$ 142.2	$ 1.3	$ 9.3	$ 140.2	$ (8.6)