Fair Value Measurements (Tables)

9 Months Ended

Sep. 25, 2020

Fair Value Disclosures [Abstract]

Summary of fair values of assets and liabilities measured on a recurring basis

The following table provides a summary of the fair values of our derivative financial instruments measured on a recurring basis under the ASC on “Fair Value Measurements and Disclosures” (U.S. dollars in millions): 

	Fair value measurements
	Foreign currency forward contracts, net (liability) asset				Bunker fuel contracts, net liability (1)				Interest rate contracts, net liability
	September 25, 2020		December 27, 2019		September 25, 2020		December 27, 2019		September 25, 2020		December 27, 2019
Quoted prices in active markets for identical assets (Level 1)	$	—	$	—	$	—	$	—	$	—	$	—
Significant observable inputs (Level 2)	(2.8)		1.0		(1.2)		—		(55.1)		(30.3)
Significant unobservable inputs (Level 3)	—		—		—		—		—		—

(1) Includes both designated and dedesignated cash flow hedges. Refer to Note 13, “Derivative Financial Instruments”, for the balances of each.