Joint Ventures and VIE's (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 26, 2020	Jun. 28, 2019	Jun. 26, 2020	Jun. 28, 2019	Sep. 27, 2019
Variable Interest Entity [Line Items]
Consolidated assets	$ 12,611,766		$ 12,611,766		$ 11,462,711
Amount by which equity method investments exceeded share of venture net assets	70,400		70,400
Income from equity method investments			1,689	$ 7,632
Consolidated Joint Venture | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Consolidated assets	304,000		304,000		192,600
Consolidated liabilities	188,800		188,800		138,500
Unconsolidated Joint Venture | VIE, not primary beneficiary
Variable Interest Entity [Line Items]
Consolidated assets	61,300		61,300		61,100
Consolidated liabilities	63,600		63,600		63,700
Equity method investments	170,500		170,500		157,900
Income from equity method investments	18,800	$ 13,200	54,800	$ 39,100
Accounts receivable from unconsolidated joint ventures accounted for under the equity method	$ 7,600		$ 7,600		$ 19,500