Revenue from Contracts with Customers (Revenue Performance Obligation Narrative) (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-03-31 $ in Millions	6 Months Ended
	Mar. 30, 2019 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation	$ 883.7
Revenue, Remaining Performance Obligation, Expected Timing Of Satisfaction, Percentage	90.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	24 months