Financial Instruments and Fair Value Measurements (Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis) (Details) - Recurring - USD ($) $ in Millions	6 Months Ended
	Jun. 29, 2018	Dec. 29, 2017
Assets:
Rabbi Trust Investments, Fair Value Disclosure	$ 35.0	$ 35.4
Equity Securities, Fair Value Disclosure	13.6	22.7
Foreign exchange forward and option contracts	0.6	0.1
Total assets at fair value	49.2	58.2
Liabilities:
Deferred Compensation Liability, Fair Value	39.8	42.7
Contingent consideration and acquired contingent liabilities	170.5	246.4
Foreign exchange forward and option contracts	0.4	0.1
Total liabilities at fair value	210.7	289.2
Level 1
Assets:
Rabbi Trust Investments, Fair Value Disclosure	23.9	24.0
Equity Securities, Fair Value Disclosure	13.6	22.7
Foreign exchange forward and option contracts	0.6	0.1
Total assets at fair value	38.1	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	0.4	0.1
Total liabilities at fair value	0.4	0.1
Level 2
Assets:
Rabbi Trust Investments, Fair Value Disclosure	11.1	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	11.1	11.4
Liabilities:
Deferred Compensation Liability, Fair Value	39.8	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	39.8	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	170.5	246.4
Foreign exchange forward and option contracts	0.0	0.0
Total liabilities at fair value	170.5	$ 246.4
Contingent Liabilities | Level 3
Liabilities:
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	$ (37.0)