(Schedule of Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - Recurring - USD ($) $ in Millions	Sep. 25, 2015	Sep. 26, 2014
Assets:
Debt and equity securities held in rabbi trusts	$ 34.6	$ 35.7
Total assets at fair value	34.6	35.7
Liabilities:
Deferred compensation liabilities	20.0	15.0
Contingent consideration	174.6	202.8
Foreign exchange forward and option contracts	3.3	0.2
Total liabilities at fair value	197.9	218.0
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Debt and equity securities held in rabbi trusts	24.2	22.9
Total assets at fair value	24.2	22.9
Liabilities:
Deferred compensation liabilities	0.0	0.0
Contingent consideration	0.0	0.0
Foreign exchange forward and option contracts	3.3	0.2
Total liabilities at fair value	3.3	0.2
Significant Other Observable Inputs (Level 2)
Assets:
Debt and equity securities held in rabbi trusts	10.4	12.8
Total assets at fair value	10.4	12.8
Liabilities:
Deferred compensation liabilities	20.0	15.0
Contingent consideration	0.0	0.0
Foreign exchange forward and option contracts	0.0	0.0
Total liabilities at fair value	20.0	15.0
Significant Unobservable Inputs (Level 3)
Assets:
Debt and equity securities held in rabbi trusts	0.0	0.0
Total assets at fair value	0.0	0.0
Liabilities:
Deferred compensation liabilities	0.0	0.0
Contingent consideration	174.6	202.8
Foreign exchange forward and option contracts	0.0	0.0
Total liabilities at fair value	$ 174.6	$ 202.8