Significant Accounting Policies (Pass-Through Costs Included in Revenues) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Oct. 02, 2015	Sep. 26, 2014
Accounting Policies [Abstract]
Pass-through costs included in revenues	$ 2,489.9	$ 2,602.6	$ 2,954.9