Derivative Financial Instruments - Fair Values of Derivative Instruments (Details) - USD ($) $ in Millions	Sep. 25, 2020	Dec. 27, 2019
Derivatives, Fair Value [Line Items]
Foreign currency forward contracts, assets	$ 1.3	$ 1.7
Interest rate swaps, asset	0.0	0.0
Total	1.7	1.7
Foreign currency forward contracts, Liability	4.1	0.7
Price Risk Derivative Liabilities, at Fair Value	2.0	0.0
Price Risk Derivative Assets, at Fair Value	0.4	0.0
Interest rate swaps, liability	55.1	30.3
Total	61.2	31.0
Cash Flow Hedge Gain (Loss) to be Reclassified during the next 8 years	(55.5)
Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Foreign currency forward contracts, assets	1.3	1.7
Interest rate swaps, asset	0.0	0.0
Total	1.7	1.7
Price Risk Derivative Assets, at Fair Value	0.4	0.0
Accounts payable and accrued expenses
Derivatives, Fair Value [Line Items]
Foreign currency forward contracts, Liability	4.1	0.7
Price Risk Derivative Liabilities, at Fair Value	1.1	0.0
Interest rate swaps, liability	0.0	0.0
Total	5.2	0.7
Other noncurrent liabilities
Derivatives, Fair Value [Line Items]
Foreign currency forward contracts, Liability	0.0	0.0
Price Risk Derivative Liabilities, at Fair Value	0.9	0.0
Interest rate swaps, liability	55.1	30.3
Total	$ 56.0	$ 30.3