Discontinued Operations (Narrative) (Details) $ in Millions		12 Months Ended
	Mar. 21, 2018 extnsion_option	Sep. 29, 2019 USD ($)	Sep. 30, 2018 USD ($)
Discontinued Operations and Disposal Groups [Abstract]
Discontinued operation, period of continuing involvement after disposal	12 months
Discontinued operation, period of continuing involvement after disposal, number of extension options | extnsion_option	2
Discontinued operation, period of continuing involvement after disposal, service period extension option	3 months
Other nonrecurring income		$ 7.0
Disposal group, including discontinued operation, accrued income tax payable			$ 2.8