Fair Value Measurements - (Tables)

6 Months Ended

Jun. 29, 2019

Fair Value Disclosures [Abstract]

Carrying Value and Estimated Fair Values of Outstanding Debt

The carrying values and estimated fair values of our significant outstanding debt as of June 29, 2019 and December 29, 2018 were as follows:

	June 29, 2019				December 29, 2018
(in millions of U.S. dollars)	Carrying Value		Fair Value		Carrying Value		Fair Value
5.500% senior notes due in 2024 1, 2	504.9		526.4		505.9		521.7
5.500% senior notes due in 2025 1, 2	741.3		755.2		740.2		695.8
Total	$	1,246.2	$	1,281.6	$	1,246.1	$	1,217.5

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¹ The fair values were based on the trading levels and bid/offer prices observed by a market participant and are considered Level 2 financial instruments.

²  Carrying value of our significant outstanding debt is net of unamortized debt issuance costs as of June 29, 2019 and December 29, 2018.