Reorganization and Realignment Costs System Optimization Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2021	Jun. 28, 2020	Jul. 04, 2021	Jun. 28, 2020
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 2,102	$ 2,911	$ 7,036	$ 6,821
System Optimization Initiative
Restructuring Cost and Reserve
Reorganization and realignment costs	897	0	5,575	84
Restructuring and Related Cost, Expected Benefit Remaining	1,000		1,000
Restructuring and Related Cost, Incurred Cost	1,165	0	2,754	84
Restructuring and Related Cost, Cost Incurred to Date	48,951		48,951
Restructuring Charges, Incurred to Date	82,183		82,183
System Optimization Initiative | Severance and related employee costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	661	0	661	0
Restructuring and Related Cost, Cost Incurred to Date	18,898		18,898
System Optimization Initiative | Professional fees
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	504	0	739	80
Restructuring and Related Cost, Cost Incurred to Date	22,846		22,846
System Optimization Initiative | Other
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	0	0	1,354	4
Restructuring and Related Cost, Cost Incurred to Date	7,207		7,207
System Optimization Initiative | Other | NPC Transaction Fees
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost			1,350
System Optimization Initiative | Accelerated depreciation and amortization
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	0	0	0	0
Restructuring and Related Cost, Cost Incurred to Date	25,398		25,398
System Optimization Initiative | NPC lease termination costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	(268)	0	2,821	0
Restructuring and Related Cost, Cost Incurred to Date	2,821		2,821
System Optimization Initiative | NPC lease termination costs | Write-Off of Lease Assets
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost			1,341
System Optimization Initiative | NPC lease termination costs | Lease Termination Fees
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost			1,480
System Optimization Initiative | Share-based compensation
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	0	$ 0	0	$ 0
Restructuring and Related Cost, Cost Incurred to Date	$ 5,013		$ 5,013