Reorganization and Realignment Costs G&A Realignment Costs (Details) $ in Thousands	3 Months Ended					12 Months Ended
	Jan. 03, 2021 USD ($)	Sep. 27, 2020 USD ($)	Jun. 28, 2020 USD ($)	Mar. 29, 2020 USD ($)	Dec. 29, 2019 USD ($)	Jan. 03, 2021 USD ($)	Dec. 29, 2019 USD ($)	Dec. 30, 2018 USD ($) Pension_Plans
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 5,834	$ 3,375	$ 2,911	$ 3,910	$ 12,194	$ 16,030	$ 16,965	$ 9,068
G&A Realignment
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost						401	6,535	5,893
Restructuring and Related Cost, Cost Incurred to Date	29,365					29,365
Reorganization and realignment costs						614	7,749	8,785
Restructuring Charges, Incurred to Date	38,811					38,811
G&A Realignment | Severance and related employee costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost						28	5,485	3,797
Restructuring and Related Cost, Cost Incurred to Date	24,266					24,266
G&A Realignment | Recruitment and relocation costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost						360	950	1,077
Restructuring and Related Cost, Cost Incurred to Date	2,876					2,876
G&A Realignment | Third-party and other costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost						13	100	1,019
Restructuring and Related Cost, Cost Incurred to Date	2,223					2,223
G&A Realignment | Share-based compensation
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost						213	1,214	1,557
Restructuring and Related Cost, Cost Incurred to Date	8,111					8,111
G&A Realignment | Termination of defined benefit plans
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost						0	$ 0	$ 1,335
Restructuring and Related Cost, Cost Incurred to Date	$ 1,335					$ 1,335
Pension Plans, Defined Benefit
Restructuring Cost and Reserve
Defined Benefit Plans, Number of Plans | Pension_Plans								2