Subsequent Events (Details) - USD ($) $ in Millions	1 Months Ended			3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 11, 2018	Nov. 29, 2018	Nov. 19, 2015	Nov. 03, 2018	Oct. 28, 2017	Nov. 03, 2018	Oct. 28, 2017	Feb. 03, 2018
Subsequent Event [Line Items]
Maximum borrowings outstanding	$ 50.0			$ 25.0		$ 25.0		$ 4.9
Debt outstanding at period end				$ 50.0		50.0
Business Acquisition, Date of Acquisition Agreement				Oct. 29, 2018
Business Acquisition, Effective Date of Acquisition	Nov. 04, 2018
Available borrowings under credit facilities				$ 100.0		100.0		$ 60.0
Line of Credit Facility, Current Borrowing Capacity	$ 59.3
Stock Repurchase Program, Authorized Amount		$ 300.0	$ 300.0	$ 300.0		$ 300.0
Shares of common stock repurchased during the period (in shares)	4,854,316			395,450	1,200,470	772,051	2,231,213
Treasury Stock, Value, Acquired, Cost Method	$ 114.1			$ 7.6	$ 15.9	$ 16.5	$ 45.2
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 188.0			$ 188.0		$ 188.0
Stock Repurchase Program Expiration Date		Jan. 29, 2022	Feb. 02, 2019