Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Provision (benefit) at statutory tax rate	$ 25,687	$ 49,398	$ (59,110)	$ 135,326
State taxes, net of federal benefit	(1,030)	4,255	(8,534)	12,238
International effective tax rate differential	4,774	1,574	12,991	4,372
U.S. tax (benefit) on foreign earnings	(6,860)	2,001	3,020	10,213
Changes in tax accruals	2,954	(3,234)	3,874	(1,941)
Tax credits	1,834	(2,486)	(2,167)	(6,223)
Non-deductible portion of impairment of goodwill	0	0	76,153	0
Tax Act's impact on deferred taxes (a)	0	0	0	(4,340)
Other	1,981	5,546	4,651	5,680
Provision for income taxes	$ 29,340	$ 57,054	$ 30,878	$ 155,325