Other (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Dec. 30, 2018
Other Expense [Line Items]
Advertising expense	$ 47.5	$ 31.6
Severance liability	6.7		$ 8.4
Capitalized Computer Software Costs
Other Expense [Line Items]
Capitalized computer software amortization	4.3	3.4
Headquarters Redesign and Consolidation
Other Expense [Line Items]
Costs incurred during the period		1.9
Restructuring costs capitalized in period	1.0	6.0
Severance | Selling, General and Administrative Expenses
Other Expense [Line Items]
Severance costs	$ 1.4	$ 2.4