Share Repurchase Program (Details) - USD ($) shares in Thousands, $ in Millions	6 Months Ended
	Jul. 14, 2018	Jul. 15, 2017	Aug. 08, 2018
Subsequent Event [Member]
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount			$ 600.0
May 2012 Stock Repurchase Plan [Member]
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired as Part of Authorized May 2012 Plan	0	0
May 2012 Share Repurchase Program, Remaining Authorized Repurchase Amount	$ 415.1
May 2012 Share Repurchase Program, Authorized Amount	$ 500.0