Common Shares and Net (Loss) Income per Common Share - Reconciliation of Numerator and Denominators of Basic and Diluted Net (Loss) Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Numerator (in millions):
Continuing operations	$ (3.2)	$ (156.8)	$ (10.8)
Discontinued operations	0.0	25.1	13.7
Net (loss) income	$ (3.2)	$ (131.7)	$ 2.9
Basic Earnings Per Share:
Weighted average common shares outstanding - basic (in shares)	160,778	155,446	135,224
Continuing operations (In USD per share)	$ (0.02)	$ (1.01)	$ (0.08)
Discontinued operations (In USD per share)	0	0.16	0.10
Net (loss) income (In USD per share)	$ (0.02)	$ (0.85)	$ 0.02
Denominator (in thousands):
Weighted average common shares outstanding - basic (in shares)	160,778	155,446	135,224
Weighted average common shares outstanding - diluted (in shares)	160,778	155,446	135,224
Diluted Earnings Per Share:
Continuing operations (In USD per share)	$ (0.02)	$ (1.01)	$ (0.08)
Discontinued operations (In USD per share)	0	0.16	0.10
Net (loss) income (In USD per share)	$ (0.02)	$ (0.85)	$ 0.02
Performance-based RSUs
Denominator (in thousands):
Dilutive effect of awards (in shares)	0	0	0
Time-based RSUs
Denominator (in thousands):
Dilutive effect of awards (in shares)	0	0	0
Stock options
Denominator (in thousands):
Dilutive effect of awards (in shares)	0	0	0