Commitments and Contingencies (Details) $ in Millions		3 Months Ended				6 Months Ended		12 Months Ended
	Mar. 14, 2019 USD ($)	Jun. 26, 2020 USD ($)	Dec. 27, 2019 USD ($)	Jun. 28, 2019 USD ($)	Mar. 31, 2017 USD ($)	Jun. 26, 2020 USD ($)	Jun. 28, 2019 USD ($)	Dec. 31, 1980 subsidiary
Commitments and Contingencies Disclosure [Line Items]
Award from litigation settlement	$ 17.0
Gain on litigation settlement	16.7
Litigation expense	$ 0.3
Restructuring, Settlement and Impairment Provisions		$ 1.4		$ 0.8		$ (0.4)	$ 3.8
Kunia Well Site
Commitments and Contingencies Disclosure [Line Items]
Number of plaintiffs | subsidiary								1
Accrual for environmental loss contingencies, period increase (decrease)					$ 0.4
Kunia Well Site cleanup operation, undiscounted estimated remediation costs associated with the cleanup		13.2				13.2
Accrual for environmental loss contingencies, undiscounted, due within one year		0.4				0.4
Accrual for environmental loss contingencies, undiscounted, due in second year		1.1				1.1
Accrual for environmental loss contingencies, undiscounted, due in third year		0.9				0.9
Accrual for environmental loss contingencies, undiscounted, due in fourth year		0.9				0.9
Accrual for environmental loss contingencies, undiscounted, due in fifth year		0.9				0.9
Kunia Well Site | Other long-term liabilities
Commitments and Contingencies Disclosure [Line Items]
Kunia Well Site cleanup operation, accrual for the expected future clean-up costs		12.9				12.9
Kunia Well Site | Accounts payable and accrued expenses
Commitments and Contingencies Disclosure [Line Items]
Kunia Well Site cleanup operation, accrual for the expected future clean-up costs		0.3				0.3
Kunia Well Site | Minimum
Commitments and Contingencies Disclosure [Line Items]
Kunia Well Site cleanup operation, undiscounted estimated remediation costs associated with the cleanup		13.2				13.2
Kunia Well Site | Maximum
Commitments and Contingencies Disclosure [Line Items]
Kunia Well Site cleanup operation, undiscounted estimated remediation costs associated with the cleanup		28.7				28.7
Net Sales | Mann Packing
Commitments and Contingencies Disclosure [Line Items]
Loss Contingency, Loss in Period			$ 6.0
Non-compliance with regulations
Commitments and Contingencies Disclosure [Line Items]
Restructuring, Settlement and Impairment Provisions						2.0
Fresh and value-added products
Commitments and Contingencies Disclosure [Line Items]
Restructuring, Settlement and Impairment Provisions		0.1		0.4		0.1	$ 0.4
Fresh and value-added products | Non-compliance with regulations
Commitments and Contingencies Disclosure [Line Items]
Restructuring, Settlement and Impairment Provisions		0.3				0.7
Fresh and value-added products | Vegetable Product Recall [Member]
Commitments and Contingencies Disclosure [Line Items]
Restructuring Charges (Credits)						6.0
Restructuring, Settlement and Impairment Provisions				$ (6.0)
Banana | Non-compliance with regulations
Commitments and Contingencies Disclosure [Line Items]
Restructuring, Settlement and Impairment Provisions		$ 0.5				$ 1.3