Financial Instruments and Risk Management (Financial Assets and Liabilities Measured at Fair Value) (Details) - USD ($) $ in Millions	Dec. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap asset	$ 0.0	$ 0.1
Interest rate swap liability	(0.3)	(5.3)
Derivative Instruments in Hedges, Net Investment in Foreign Operations, Liabilities, Fair Value	13.8	0.0
Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign exchange contracts asset	0.3	6.6
Foreign exchange contracts liability	$ (5.0)	$ (0.3)