Equity (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		12 Months Ended
	Mar. 30, 2018	Dec. 30, 2016	Dec. 29, 2017	Mar. 01, 2017	Mar. 16, 2016
March 2016 Repurchase Program
Equity, Class of Treasury Stock
Stock Repurchase Program, Authorized Amount					$ 350.0
Stock Repurchased During Period, Number of Shares		1,501,676	5,366,741
Stock Repurchased During Period, Amount		$ 84.0	$ 266.0
Stock Repurchase Program, Remaining Amount Available	$ 0.0
March 2017 Repurchase Program
Equity, Class of Treasury Stock
Stock Repurchase Program, Authorized Amount				$ 1,000.0
Stock Repurchased During Period, Number of Shares	2,880,527	0	13,490,448
Stock Repurchased During Period, Amount	$ 45.2	$ 0.0	$ 380.6
Stock Repurchase Program, Remaining Amount Available	$ 574.2