Other (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2018	Mar. 26, 2017	Dec. 31, 2017
Other Expense [Line Items]
Advertising expense	$ 31.6	$ 33.6
Severance liability	11.5		$ 18.8
Capitalized Computer Software Costs
Other Expense [Line Items]
Capitalized computer software amortization	3.4	3.1
Headquarters Redesign and Consolidation
Other Expense [Line Items]
Costs incurred during the period	1.9	2.4
Restructuring costs capitalized in period	6.4	1.0
Severance | Selling, General and Administrative Expenses
Other Expense [Line Items]
Severance costs	$ 2.4	$ 1.6