Revenue - Schedule of Revenue to External Customers (Details) - USD ($) $ in Millions	3 Months Ended
Apr. 03, 2021	Mar. 28, 2020
Disaggregation of Revenue [Line Items]
Total	$ 478.4	$ 474.2
United States
Disaggregation of Revenue [Line Items]
Total	349.9	334.6
United Kingdom
Disaggregation of Revenue [Line Items]
Total	36.7	42.5
Canada
Disaggregation of Revenue [Line Items]
Total	15.9	16.1
All other countries
Disaggregation of Revenue [Line Items]
Total	$ 75.9	$ 81.0

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details