(Schedule of Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - Recurring - USD ($) $ in Millions	Dec. 29, 2017	Dec. 30, 2016
Assets:
Debt and equity securities held in rabbi trusts	$ 35.4	$ 33.6
Other Assets, Fair Value Disclosure	22.7	0.7
Foreign Currency Contract, Asset, Fair Value Disclosure	0.1
Total assets at fair value	58.2	34.3
Liabilities:
Deferred compensation liabilities	42.7	32.5
Contingent consideration	246.4	250.5
Foreign exchange forward and option contracts	0.1	3.4
Total liabilities at fair value	289.2	286.4
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Debt and equity securities held in rabbi trusts	24.0	22.8
Other Assets, Fair Value Disclosure	22.7	0.7
Foreign Currency Contract, Asset, Fair Value Disclosure	0.1
Total assets at fair value	46.8	23.5
Liabilities:
Deferred compensation liabilities	0.0	0.0
Contingent consideration	0.0	0.0
Foreign exchange forward and option contracts	0.1	3.4
Total liabilities at fair value	0.1	3.4
Significant Other Observable Inputs (Level 2)
Assets:
Debt and equity securities held in rabbi trusts	11.4	10.8
Other Assets, Fair Value Disclosure	0.0	0.0
Foreign Currency Contract, Asset, Fair Value Disclosure	0.0
Total assets at fair value	11.4	10.8
Liabilities:
Deferred compensation liabilities	42.7	32.5
Contingent consideration	0.0	0.0
Foreign exchange forward and option contracts	0.0	0.0
Total liabilities at fair value	42.7	32.5
Significant Unobservable Inputs (Level 3)
Assets:
Debt and equity securities held in rabbi trusts	0.0	0.0
Other Assets, Fair Value Disclosure	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	246.4	250.5
Foreign exchange forward and option contracts	0.0	0.0
Total liabilities at fair value	$ 246.4	$ 250.5