Income Taxes Major Tax Legislation (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Major Tax Legislation
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%	35.00%	35.00%
Income tax benefit (provision)	$ 121,649	$ (114,801)	$ 93,010	$ (72,066)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount		0	164,893	0
Current State and Local Tax Expense (Benefit)		$ 2,661	$ 4,055	$ 5,805
Tax Act
Major Tax Legislation
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%	35.00%
Income tax benefit (provision)		$ (2,159)	$ 140,379
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount		(2,426)	164,893
Expense (benefit) International-Related Provisions			$ 22,209
Nondeductible expense related to certain executive compensation		991
Current State and Local Tax Expense (Benefit)		28
Tax Credit, Foreign, Amount		1,286
Deferred Tax Liabilities Deemed Repatriation		$ 1,985