Share Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 13, 2019	Jul. 14, 2018	Jul. 13, 2019	Jul. 14, 2018	Aug. 07, 2019	Aug. 08, 2018
Class of Stock [Line Items]
Document Period End Date			Jul. 13, 2019
August 2018 Share Repurchase Program [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount						$ 600.0
Treasury Stock, Shares, Acquired as Part of Authorized Plan	100		900
Payments for Repurchase of Common Stock	$ 10.9		$ 138.1
Acquired, Average Cost Per Share, Acquired as Part of Plan	$ 151.58		$ 158.98
Share Repurchase Program, Remaining Authorized Repurchase Amount	$ 189.1		$ 189.1
May 2012 Share Repurchase Program [Member]
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired as Part of Authorized Plan		0		0
Subsequent Event [Member] | August 2019 Share Repurchase Program [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount					$ 400.0