Intangible assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Intangible Assets

The following table summarizes intangible assets as of December 31, 2016 and January 2, 2016:

	December 31, 2016						January 2, 2016
			Accumulated						Accumulated
(in millions of U.S. dollars)	Cost		Amortization		Net		Cost		Amortization		Net
Intangibles
Not subject to amortization
Rights 1	$	45.0		—	$	45.0	$	45.0		—	$	45.0
Trademarks		257.1		—		257.1		183.1		—		183.1
Total intangibles not subject to amortization		302.1		—		302.1		228.1		—		228.1
Subject to amortization
Customer relationships		900.1		303.4		596.7		663.9		241.0		422.9
Trademarks		31.6		27.9		3.7		33.0		28.1		4.9
Information technology		70.5		38.0		32.5		54.0		29.1		24.9
Other		10.3		5.6		4.7		7.8		4.5		3.3
Total intangibles subject to amortization		1,012.5		374.9		637.6		758.7		302.7		456.0
Total intangible assets		1,314.6		374.9		939.7		986.8		302.7		684.1

^1.  Relates to the 2001 acquisition of the Rights.

Estimated Amortization Expense for Intangible Assets

The estimated amortization expense for intangible assets subject to amortization over the next five years is:

(in millions of U.S. dollars)
2017	$	87.2
2018		81.7
2019		71.7
2020		62.2
2021		56.8
Thereafter		278.0
Total	$	637.6