Fair Value Measurements - Nonrecurring Fair Value Measurement (Detail) - Nonrecurring - USD ($) $ in Millions	Dec. 27, 2019	Jun. 28, 2019	Dec. 28, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	$ 1.3		$ 85.7
DM Foods | Trademarks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value			31.9
United States
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value			45.4
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	0.0		0.0
Quoted Prices in Active Markets for Identical Assets (Level 1) | DM Foods | Trademarks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value			0.0
Quoted Prices in Active Markets for Identical Assets (Level 1) | United States
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value			0.0
Significant Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	0.0		0.0
Significant Observable Inputs (Level 2) | DM Foods | Trademarks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value			0.0
Significant Observable Inputs (Level 2) | United States
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value			0.0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	1.3		85.7
Significant Unobservable Inputs (Level 3) | DM Foods | Trademarks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value			31.9
Significant Unobservable Inputs (Level 3) | United States
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value			45.4
Equity Investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	1.3
Equity Investment | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	0.0
Equity Investment | Significant Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	0.0
Equity Investment | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	$ 1.3	$ 1.3
Contract termination costs | Philippines
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value			1.9
Contract termination costs | Quoted Prices in Active Markets for Identical Assets (Level 1) | Philippines
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value			0.0
Contract termination costs | Significant Observable Inputs (Level 2) | Philippines
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value			0.0
Contract termination costs | Significant Unobservable Inputs (Level 3) | Philippines
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value			1.9
Underutilized assets | Central America
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value			6.5
Underutilized assets | Quoted Prices in Active Markets for Identical Assets (Level 1) | Central America
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value			0.0
Underutilized assets | Significant Observable Inputs (Level 2) | Central America
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value			0.0
Underutilized assets | Significant Unobservable Inputs (Level 3) | Central America
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value			$ 6.5