Subsequent Event (Details) - USD ($)	Jan. 31, 2019	Dec. 29, 2018	Jan. 31, 2018
Subsequent Event [Line Items]
Common stock approved under the share repurchase program			$ 200,000,000
January 2019 Repurchase Program | Subsequent Event
Subsequent Event [Line Items]
Common stock approved under the share repurchase program	$ 200,000,000
January 2018 Repurchase Program
Subsequent Event [Line Items]
Common stock available for repurchase		$ 50,000,000