Leases Cumulative Effect Transition (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 28, 2019	Dec. 30, 2018	Dec. 29, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets	$ 121,746		$ 0
Prepaid expenses and other	402,247		334,870
Other current liabilities	153,187		69,122
Other liabilities	$ 132,289		$ 42,376
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which introduces a new accounting model that requires most leases to be reported on the balance sheet. It also establishes disclosure requirements, which are more extensive than those required under prior U.S. GAAP. The standard requires use of the modified retrospective (cumulative effect) transition approach and was effective for the Company in the first quarter of 2019. We selected the effective date of ASU 2016-02 as the date of initial application on transition, as permitted by ASU 2016-02, as amended ("Topic 842"). Under this transition method, the cumulative effect from prior periods upon applying the new guidance to arrangements containing leases was recognized in our condensed consolidated balance sheets as of December 30, 2018. We did not recast comparative periods
Right-of-use assets		$ 129,652
Prepaid expenses and other		3,968
Other current liabilities		22,767
Other liabilities		$ 110,853