Divestitures (Details) - USD ($) $ in Millions		6 Months Ended
Divestitures (Details) - USD ($) $ in Millions	Jul. 21, 2017	Jul. 29, 2017	Jul. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses		$ 51.2	$ 0.0
Gain (Loss) on Disposition of Business		7.3	$ 0.0
Kongregate [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (Loss) on Disposition of Business		$ 7.3
UnrestrictedAndRestricted [Member] \| Kongregate [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses	$ 54.7
Restricted Cash [Member] \| Kongregate [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses	$ 3.5