(Schedule of Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - Recurring - USD ($) $ in Millions	Sep. 30, 2016	Sep. 25, 2015
Assets:
Debt and equity securities held in rabbi trusts	$ 34.6	$ 34.6
Foreign Currency Contract, Asset, Fair Value Disclosure	0.2
Total assets at fair value	34.8	34.6
Liabilities:
Deferred compensation liabilities	26.8	20.0
Contingent consideration	247.8	174.6
Foreign exchange forward and option contracts	1.6	3.3
Total liabilities at fair value	276.2	197.9
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Debt and equity securities held in rabbi trusts	23.1	24.2
Foreign Currency Contract, Asset, Fair Value Disclosure	0.2
Total assets at fair value	23.3	24.2
Liabilities:
Deferred compensation liabilities	0.0	0.0
Contingent consideration	0.0	0.0
Foreign exchange forward and option contracts	1.6	3.3
Total liabilities at fair value	1.6	3.3
Significant Other Observable Inputs (Level 2)
Assets:
Debt and equity securities held in rabbi trusts	11.5	10.4
Foreign Currency Contract, Asset, Fair Value Disclosure	0.0
Total assets at fair value	11.5	10.4
Liabilities:
Deferred compensation liabilities	26.8	20.0
Contingent consideration	0.0	0.0
Foreign exchange forward and option contracts	0.0	0.0
Total liabilities at fair value	26.8	20.0
Significant Unobservable Inputs (Level 3)
Assets:
Debt and equity securities held in rabbi trusts	0.0	0.0
Foreign Currency Contract, Asset, Fair Value Disclosure	0.0
Total assets at fair value	0.0	0.0
Liabilities:
Deferred compensation liabilities	0.0	0.0
Contingent consideration	247.8	174.6
Foreign exchange forward and option contracts	0.0	0.0
Total liabilities at fair value	$ 247.8	$ 174.6