Financial Instruments and Fair Value Measurements (Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis) (Details) - Recurring - USD ($) $ in Millions	Jun. 28, 2019	Dec. 28, 2018
Assets:
Rabbi Trust Investments, Fair Value Disclosure	$ 35.4	$ 33.1
Liabilities:
Deferred Compensation Liability, Fair Value	45.4	38.5
Contingent consideration and acquired contingent liabilities	130.4	151.4
Total liabilities at fair value	175.8	189.9
Level 1
Assets:
Rabbi Trust Investments, Fair Value Disclosure	25.6	22.4
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
Level 2
Assets:
Rabbi Trust Investments, Fair Value Disclosure	9.8	10.7
Liabilities:
Deferred Compensation Liability, Fair Value	45.4	38.5
Contingent consideration and acquired contingent liabilities	0.0	0.0
Total liabilities at fair value	45.4	38.5
Level 3
Assets:
Rabbi Trust Investments, Fair Value Disclosure	0.0	0.0
Liabilities:
Deferred Compensation Liability, Fair Value	0.0	0.0
Contingent consideration and acquired contingent liabilities	130.4	151.4
Total liabilities at fair value	$ 130.4	$ 151.4