Income Taxes Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018
Income Tax Contingency [Line Items]
Inventory	$ 4,662	$ 0
Reserves and accruals	46,817	39,487
Accrued compensation	18,953	21,709
Net operating loss and credit carryforwards	116,751	144,421
Accrued pension	35,890	31,146
Restructuring reserve	2,983	1,780
Deferred revenue	30,412	31,045
Deferred tax assets, operating lease liabilities	46,477	0
Deferred Tax Assets, Gross	302,945	269,588
Deferred Tax Liabilities, Inventory	0	(278)
Postretirement health benefits	(4,106)	(3,406)
Depreciation and amortization	(330,768)	(309,958)
Deferred Tax Liabilities, Other	(1,780)	(1,879)
Deferred tax liabilities, operating lease right-of-use assets	(42,774)	0
Total deferred tax liabilities	(379,428)	(315,521)
Valuation allowance	(88,449)	(102,087)
Deferred Tax Liabilities, Net	(164,932)	(148,020)
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	13,600
Domestic Country [Member]
Income Tax Contingency [Line Items]
Net deferred tax liabilities	(43,683)	(52,469)
Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]
Deferred Tax Liabilities, Net	$ (208,615)	$ (200,489)