Warranty Obligations (Narrative) (Details)	12 Months Ended
	Sep. 28, 2019
Product Warranty Liability [Line Items]
Number of previous months historical warranty claims used to calculate warranty expense percentage	12 months
Minimum
Product Warranty Liability [Line Items]
Life of warranty obligations for sales that include installation services in months	12 months
Product obligation period from date of purchase in months	12 months
Maximum
Product Warranty Liability [Line Items]
Life of warranty obligations for sales that include installation services in months	24 months
Product obligation period from date of purchase in months	24 months