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Investments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Investments (Details) - USD ($) $ in Millions	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020	Dec. 31, 2020
Other (income) expense, net
Schedule of Equity Method Investments [Line Items]
Equity securities, fair value method, other expense (income)	$ 0.9	$ (0.4)	$ 0.9	$ 2.5
Equity securities, equity method, other expense (income)	0.0	$ (0.8)	0.7	$ (1.5)
Prepaid expenses and other current assets
Schedule of Equity Method Investments [Line Items]
Equity securities, fair value method	1.6		1.6		$ 2.5
Other non-current assets
Schedule of Equity Method Investments [Line Items]
Equity securities, fair value method	1.7		1.7		1.9
Equity securities, equity method, other non-current assets	$ 69.1		$ 69.1		$ 69.8