Fair Value of Financial Instruments - Fair Value Hierarchy (Details) - USD ($) $ in Millions	Mar. 28, 2021	Dec. 27, 2020	Mar. 29, 2020
Assets:
Available-for-sale securities	$ 2.2	$ 2.1	$ 0.8
Derivatives	9.4	4.8	46.8
Total assets	11.6	6.9	47.5
Liabilities:
Derivatives	6.8	12.7	13.1
Option agreement	21.8	20.6	20.9
Total liabilities	28.6	33.3	34.0
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Available-for-sale securities	2.2	2.1	0.8
Derivatives	0.0	0.0	0.0
Total assets	2.2	2.1	0.8
Liabilities:
Derivatives	0.0	0.0	0.0
Option agreement	0.0	0.0	0.0
Total liabilities	0.0	0.0	0.0
Significant Other Observable Inputs (Level 2)
Assets:
Available-for-sale securities	0.0	0.0	0.0
Derivatives	9.4	4.8	46.8
Total assets	9.4	4.8	46.8
Liabilities:
Derivatives	6.8	12.7	13.1
Option agreement	0.0	0.0	0.0
Total liabilities	6.8	12.7	13.1
Significant Unobservable Inputs (Level 3)
Assets:
Available-for-sale securities	0.0	0.0	0.0
Derivatives	0.0	0.0	0.0
Total assets	0.0	0.0	0.0
Liabilities:
Derivatives	0.0	0.0	0.0
Option agreement	21.8	20.6	20.9
Total liabilities	$ 21.8	$ 20.6	$ 20.9