Financial Instruments and Fair Value Measurements (Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions	Sep. 27, 2019	Dec. 28, 2018
Assets:
Other Assets, Fair Value Disclosure	$ 11.4
Assets, Fair Value Disclosure	47.1
Recurring
Assets:
Rabbi Trust Investments, Fair Value Disclosure	35.7	$ 33.1
Liabilities:
Deferred Compensation Liability, Fair Value	37.3	38.5
Contingent consideration and acquired contingent liabilities	105.4	151.4
Total liabilities at fair value	142.7	189.9
Recurring | Level 1
Assets:
Rabbi Trust Investments, Fair Value Disclosure	25.9	22.4
Other Assets, Fair Value Disclosure	11.4
Assets, Fair Value Disclosure	37.3
Liabilities:
Deferred Compensation Liability, Fair Value	0.0	0.0
Contingent consideration and acquired contingent liabilities	0.0	0.0
Total liabilities at fair value	0.0	0.0
Recurring | Level 2
Assets:
Rabbi Trust Investments, Fair Value Disclosure	9.8	10.7
Other Assets, Fair Value Disclosure	0.0
Assets, Fair Value Disclosure	9.8
Liabilities:
Deferred Compensation Liability, Fair Value	37.3	38.5
Contingent consideration and acquired contingent liabilities	0.0	0.0
Total liabilities at fair value	37.3	38.5
Recurring | Level 3
Assets:
Rabbi Trust Investments, Fair Value Disclosure	0.0	0.0
Other Assets, Fair Value Disclosure	0.0
Assets, Fair Value Disclosure	0.0
Liabilities:
Deferred Compensation Liability, Fair Value	0.0	0.0
Contingent consideration and acquired contingent liabilities	105.4	151.4
Total liabilities at fair value	$ 105.4	$ 151.4