Financial Instruments and Fair Value Measurements (Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions	Mar. 28, 2025	Dec. 27, 2024
Assets:
Cash Flow Hedge Derivative Instrument Assets at Fair Value	$ 2.7	$ 5.3
Other Assets, Fair Value Disclosure	5.8	12.0
Assets, Fair Value Disclosure	33.7	42.7
Level 1 | Indemnification Agreement
Liabilities:
Restricted Cash and Cash Equivalents	63.5	63.1
Recurring
Assets:
Rabbi Trust Investments, Fair Value Disclosure	25.2	25.4
Liabilities:
Deferred Compensation Liability, Fair Value	19.5	22.5
Contingent consideration and acquired contingent liabilities	17.4	17.5
Total liabilities at fair value	36.9	40.0
Derivative Liability	0.0	0.0
Recurring | Level 1
Assets:
Rabbi Trust Investments, Fair Value Disclosure	16.8	17.4
Cash Flow Hedge Derivative Instrument Assets at Fair Value	0.0	0.0
Other Assets, Fair Value Disclosure	5.8	12.0
Assets, Fair Value Disclosure	22.6	29.4
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
Recurring | Level 2
Assets:
Rabbi Trust Investments, Fair Value Disclosure	8.4	8.0
Cash Flow Hedge Derivative Instrument Assets at Fair Value	2.7	5.3
Other Assets, Fair Value Disclosure	0.0	0.0
Assets, Fair Value Disclosure	11.1	13.3
Liabilities:
Deferred Compensation Liability, Fair Value	19.5	22.5
Contingent consideration and acquired contingent liabilities	0.0	0.0
Total liabilities at fair value	19.5	22.5
Recurring | Level 3
Assets:
Rabbi Trust Investments, Fair Value Disclosure	0.0	0.0
Cash Flow Hedge Derivative Instrument Assets at Fair Value	0.0	0.0
Other Assets, Fair Value Disclosure	0.0	0.0
Assets, Fair Value Disclosure	0.0	0.0
Liabilities:
Deferred Compensation Liability, Fair Value	0.0	0.0
Contingent consideration and acquired contingent liabilities	17.4	17.5
Total liabilities at fair value	$ 17.4	$ 17.5