Reorganization and Reorganization Costs System Optimization Costs (Details) - USD ($) $ in Thousands	3 Months Ended					12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 12,194	$ 2,377	$ 941	$ 3,124	$ 2,626	$ 16,965	$ 9,068	$ 22,574
System Optimization
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost						89	283	911
Restructuring and Related Cost, Cost Incurred to Date	41,870					41,870
Reorganization and realignment costs						89	283	911
Restructuring Charges, Incurred to Date	72,281					72,281
Severance and related employee costs | System Optimization
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost						0	0	3
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						72	264	838
Restructuring and Related Cost, Cost Incurred to Date	17,784					17,784
Other | System Optimization
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost						17	19	70
Restructuring and Related Cost, Cost Incurred to Date	5,849					5,849
Accelerated depreciation and amortization | System Optimization
Restructuring Cost and Reserve
Restructuring and Related Cost, Cost Incurred to Date	25,398					25,398
Reorganization and realignment costs						0	0	0
Share-based compensation | System Optimization
Restructuring Cost and Reserve
Restructuring and Related Cost, Cost Incurred to Date	$ 5,013					5,013
Reorganization and realignment costs						$ 0	$ 0	$ 0