Equity Stock Repurchase Program (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 30, 2016	Dec. 27, 2019	Dec. 28, 2018	Dec. 29, 2017	Mar. 01, 2017	Mar. 16, 2016
Class of Stock [Line Items]
Share-based Payment Arrangement, Cash Used to Settle Award		$ 2.6	$ 0.0	$ 5.1
March 2016 Repurchase Program [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount						$ 350.0
Repurchase of ordinary shares, shares	1,501,676	0	0	5,366,741
Repurchase of ordinary shares, value	$ 84.0	$ 0.0	$ 0.0	$ 266.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 0.0
March 2017 Repurchase Program [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount					$ 1,000.0
Repurchase of ordinary shares, shares	0	0	3,610,968	13,490,448
Repurchase of ordinary shares, value	$ 0.0	$ 0.0	$ 55.2	$ 380.6
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 564.2