Revenue from Contracts with Customers - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 27, 2020	Sep. 30, 2019
Revenue from External Customer [Line Items]
Contract with customer, asset, expected to be transferred to receivables within the next 12 months and therefore	$ 14,100
Contract with customer, asset, reclassified to receivable	13,300
Contract with customer, asset, decrease in contract assets	(2,400)
Contract with customer, asset, increase in contract assets related to revenue recognized	10,900
Deferred revenue, revenue recognized	344,500
Deferred revenue, additions	349,900
Short term and long term accounts receivable	405,100	$ 412,500
Refund liability	31,600	22,900
Deferred revenue	404,682	396,632
Revenue, remaining performance obligation, amount	997,300
Unrecorded
Revenue from External Customer [Line Items]
Revenue, remaining performance obligation, amount	592,600
Other Current Assets
Revenue from External Customer [Line Items]
Capitalized contract cost, net	31,100	27,700
Other Assets
Revenue from External Customer [Line Items]
Capitalized contract cost, net	$ 65,000	$ 64,800