Revenue (Tables)

6 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

Further disaggregation of net revenue to external customers by geographic area based on customer location is as follows:

	For the Three Months Ended				For the Six Months Ended
(in millions of U.S. dollars)	June 30, 2018		July 1, 2017		June 30, 2018		July 1, 2017
United States	$	453.6	$	438.0	$	872.2	$	847.6
United Kingdom	41.5		38.9		85.1		77.6
Canada	16.9		15.7		32.1		30.2
All other countries	91.6		88.0		175.0		162.1
Total 1	$	603.6	$	580.6	$	1,164.4	$	1,117.5

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¹     Prior-period amounts are not adjusted under the modified-retrospective method of adoption.