Segment and Geographic Information - Summary of Revenue for Geographic Regions (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 28, 2019
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenue	$ 429,050	$ 356,110
Americas
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenue	202,279	155,973
Europe
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenue	162,319	136,521
Asia-Pacific
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenue	$ 64,452	$ 63,616