Financial Instruments and Fair Value Measurements (Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis) (Details) - Recurring - USD ($) $ in Millions	Sep. 28, 2018	Dec. 29, 2017
Assets:
Rabbi Trust Investments, Fair Value Disclosure	$ 35.3	$ 35.4
Equity Securities, Fair Value Disclosure	0.0	22.7
Foreign exchange forward and option contracts	0.0	0.1
Total assets at fair value	35.3	58.2
Liabilities:
Deferred Compensation Liability, Fair Value	41.7	42.7
Contingent consideration and acquired contingent liabilities	167.3	246.4
Foreign exchange forward and option contracts	0.1	0.1
Total liabilities at fair value	209.1	289.2
Level 1
Assets:
Rabbi Trust Investments, Fair Value Disclosure	24.5	24.0
Equity Securities, Fair Value Disclosure	0.0	22.7
Foreign exchange forward and option contracts	0.0	0.1
Total assets at fair value	24.5	46.8
Liabilities:
Deferred Compensation Liability, Fair Value	0.0	0.0
Contingent consideration and acquired contingent liabilities	0.0	0.0
Foreign exchange forward and option contracts	0.1	0.1
Total liabilities at fair value	0.1	0.1
Level 2
Assets:
Rabbi Trust Investments, Fair Value Disclosure	10.8	11.4
Equity Securities, Fair Value Disclosure	0.0	0.0
Foreign exchange forward and option contracts	0.0	0.0
Total assets at fair value	10.8	11.4
Liabilities:
Deferred Compensation Liability, Fair Value	41.7	42.7
Contingent consideration and acquired contingent liabilities	0.0	0.0
Foreign exchange forward and option contracts	0.0	0.0
Total liabilities at fair value	41.7	42.7
Level 3
Assets:
Rabbi Trust Investments, Fair Value Disclosure	0.0	0.0
Equity Securities, Fair Value Disclosure	0.0	0.0
Foreign exchange forward and option contracts	0.0	0.0
Total assets at fair value	0.0	0.0
Liabilities:
Deferred Compensation Liability, Fair Value	0.0	0.0
Contingent consideration and acquired contingent liabilities	167.3	246.4
Foreign exchange forward and option contracts	0.0	0.0
Total liabilities at fair value	$ 167.3	$ 246.4