Common Shares and Net Income (Loss) per Common Share - Reconciliation of Numerator and Denominators of Basic and Diluted Net Income (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Numerator (in millions):
Continuing operations	$ 29.6	$ (3.2)	$ (156.8)
Discontinued operations	0.0	0.0	25.1
Net income (loss)	$ 29.6	$ (3.2)	$ (131.7)
Basic Earnings Per Share:
Weighted average common shares outstanding - basic (in shares)	160,763	160,778	155,446
Continuing operations (In USD per share)	$ 0.18	$ (0.02)	$ (1.01)
Discontinued operations (In USD per share)	0	0	0.16
Net income (loss) (In USD per share)	$ 0.18	$ (0.02)	$ (0.85)
Denominator (in thousands):
Weighted average common shares outstanding - basic (in shares)	160,763	160,778	155,446
Weighted average common shares outstanding - diluted (in shares)	161,885	160,778	155,446
Diluted Earnings Per Share:
Continuing operations (In USD per share)	$ 0.18	$ (0.02)	$ (1.01)
Discontinued operations (In USD per share)	0	0	0.16
Net income (loss) (In USD per share)	$ 0.18	$ (0.02)	$ (0.85)
Performance-based RSUs
Denominator (in thousands):
Dilutive effect of awards (in shares)	445	0	0
Time-based RSUs
Denominator (in thousands):
Dilutive effect of awards (in shares)	416	0	0
Stock options
Denominator (in thousands):
Dilutive effect of awards (in shares)	261	0	0