Accumulated Other Comprehensive Loss (Schedule of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 27, 2019	Sep. 28, 2018	Dec. 29, 2018	Dec. 28, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Adjusted for ASU				$ (24.3)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	$ (24.3)	$ (14.4)
Other Comprehensive Income (Loss), before Reclassifications	1.8	0.2
Reclassification from Accumulated Other Comprehensive Income	(0.1)	(4.5)
Other Comprehensive Income (Loss)	1.7	(4.3)
Ending Balance	(22.1)	(18.7)
Accumulated Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(20.4)	(8.2)
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			$ 0.0
Other Comprehensive Income (Loss), before Reclassifications	1.6	(4.1)
Reclassification from Accumulated Other Comprehensive Income	0.0	0.0
Other Comprehensive Income (Loss)	1.6	(4.1)
Ending Balance	(18.8)	(12.3)
Accumulated Unrecognized Gain (Loss) on Derivatives
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(4.0)	(4.7)
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			0.0
Other Comprehensive Income (Loss), before Reclassifications	0.0	0.0
Reclassification from Accumulated Other Comprehensive Income	1.0	0.7
Other Comprehensive Income (Loss)	1.0	0.7
Ending Balance	(3.0)	(4.0)
Accumulated Unrecognized Gain (Loss) on Benefit Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	0.1	(1.5)
Other Comprehensive Income (Loss), before Reclassifications	0.2	4.3
Reclassification from Accumulated Other Comprehensive Income	(1.1)	(5.2)
Other Comprehensive Income (Loss)	(0.9)	(0.9)
Ending Balance	$ (0.3)	$ (2.4)
Accounting Standards Update 2018-02 [Member] | Accumulated Unrecognized Gain (Loss) on Benefit Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			0.5
Accumulated Other Comprehensive Loss | Accounting Standards Update 2018-02 [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			$ 0.5