Property, Equipment and Improvements, Net - Sale-Leaseback (Details) - USD ($) $ in Millions	Apr. 27, 2018	May 05, 2018
Sale Leaseback Transaction [Line Items]
Purchase price for sale of facility	$ 13.7
Lease period	15 years
Deferred gain	$ 7.7
Restricted cash		$ 1.7
Other Noncurrent Liabilities
Sale Leaseback Transaction [Line Items]
Deferred gain		7.2
Accrued Liabilities and Other Current Liabilities
Sale Leaseback Transaction [Line Items]
Deferred gain		0.5
Cash and Cash Equivalents
Sale Leaseback Transaction [Line Items]
Restricted cash		$ 1.7