Significant Accounting Policies - Basis of Presentation and Principles of Consolidation (Details)	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Significant Accounting Policies
Length of fiscal year	371 days	364 days	364 days
Minimum
Significant Accounting Policies
Length of fiscal year	364 days
Maximum
Significant Accounting Policies
Length of fiscal year	371 days