Retirement Plans Narrative (Details) $ in Millions	12 Months Ended
	Sep. 30, 2016 USD ($) contract	Sep. 25, 2015 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of Life Insurance Contract Held in Rabbi Trust | contract	134
Deferred Compensation Plan Assets	$ 59.2	$ 57.9
Deferred Compensation Plan Assets, Death Benefit on Insurance Contracts	150.0	147.3
Deferred Compensation Plan Assets, Loans Outstanding Against Insurance Contracts	43.4	40.4
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	16.7	10.4
Non-U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Deferred Compensation Plan Assets, Collateral For Plan Benefits	$ 8.3	8.9
Moody's, Aa1 Rating [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Lower Threshold for Discount Rate Basis, Corporate Bonds		$ 250.0