Reorganization and Reorganization Costs System Optimization Costs (Details) - USD ($) $ in Thousands	3 Months Ended							12 Months Ended
	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 2,377	$ 941	$ 3,124	$ 2,626	$ 1,806	$ 2,888	$ 17,699	$ 9,068	$ 22,574	$ 10,083
System Optimization
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost Remaining	500							500
Restructuring and Related Cost, Incurred Cost								283	911	7,791
Restructuring and Related Cost, Cost Incurred to Date	41,781							41,781
Reorganization and realignment costs								283	911	9,391
Restructuring Charges, Incurred to Date	72,192							72,192
Employee Severance | System Optimization
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost								0	3	82
Restructuring and Related Cost, Cost Incurred to Date	18,237							18,237
Professional Fees | System Optimization
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost								264	838	7,437
Restructuring and Related Cost, Cost Incurred to Date	17,712							17,712
Other Restructuring | System Optimization
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost								19	70	272
Restructuring and Related Cost, Cost Incurred to Date	5,832							5,832
Accelerated Depreciation and Amortization | System Optimization
Restructuring Cost and Reserve
Reorganization and realignment costs								0	0	1,600
Restructuring Charges, Incurred to Date	25,398							25,398
Share Based Compensation Expense | System Optimization
Restructuring Cost and Reserve
Reorganization and realignment costs								0	$ 0	$ 0
Restructuring Charges, Incurred to Date	$ 5,013							$ 5,013