Significant Accounting Policies - Property and Equipment, Long-Lived Assets and Leases (Details)	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019
Leases
Operating lease right-of-use assets, Statement of Financial Position	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent
Operating lease liabilities, Statement of Financial Position	us-gaap:OtherLiabilitiesCurrent us-gaap:LiabilitiesOtherThanLongtermDebtNoncurrent	us-gaap:OtherLiabilitiesCurrent us-gaap:LiabilitiesOtherThanLongtermDebtNoncurrent
Minimum
Property and Equipment
Useful life, Property and Equipment	3 years
Long-Lived Assets
Useful life, Intangible assets	2 years
Maximum
Property and Equipment
Useful life, Property and Equipment	15 years
Long-Lived Assets
Useful life, Intangible assets	12 years
Buildings
Property and Equipment
Useful life, Property and Equipment	40 years
Leasehold interest in ground leases
Property and Equipment
Useful life, Property and Equipment	86 years