Warranty Obligations (Narrative) (Details)	6 Months Ended
	Apr. 01, 2017
Product Warranties Disclosures [Abstract]
Life of warranty obligations for sales that include installation services, minimum	12 months
Life of warranty obligations for sales that include installation services, maximum	24 months
Product obligation period, minimum	12 months
Product obligation period, maximum	24 months
Number of previous months historical warranty claims used to calculate warranty expense percentage	12 months