Income Taxes (Provision For) Benefit from Continuing Operations (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Current:
U.S. Federal		$ (109,078)	$ (13,092)	$ (75,167)
State		(2,661)	(4,055)	(5,805)
Foreign		(9,630)	(9,173)	(5,307)
Current tax provision		(121,369)	(26,320)	(86,279)
Deferred:
U.S. Federal		5,071	127,592	7,975
State		441	(7,729)	6,733
Foreign		1,056	(533)	(495)
Deferred tax benefit (provision)		6,568	119,330	14,213
Income tax benefit (provision)	$ 121,649	$ (114,801)	$ 93,010	$ (72,066)