Litigation and Contingencies Environmental Remediation (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 26, 2020	Sep. 26, 2020	Sep. 28, 2019
Environmental Exit Cost [Line Items]
Site Contingency, Recovery from Third Party of Environmental Remediation Cost		$ 55.0
Insurance Recoveries	$ 1.2	7.0
Accrual for Environmental Loss Contingencies [Roll Forward]
Remediation liability at beginning of the year		124.4	$ 22.6
Changes in estimate		0.0	0.0
Amounts paid		(27.1)	(7.8)
Remediation liability at the end of the quarter	97.3	97.3	$ 14.8
Environmental remediation accrual, current	23.7	23.7
Environmental remediation accrual, noncurrent	$ 73.6	$ 73.6

Total costs accrued as of the balance sheet date for environmental loss contingencies.

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