Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2018	Mar. 31, 2017	Dec. 29, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Adjusted for ASU			$ (14.4)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	$ (12.9)	$ (72.5)
Other Comprehensive Income (Loss), before Reclassifications	(2.3)	27.1
Reclassification from Accumulated Other Comprehensive Income	(0.1)	35.5
Other Comprehensive Income (Loss)	(2.4)	62.6
Ending Balance	(16.8)	(9.9)
Accumulated Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(8.2)	(19.5)
Other Comprehensive Income (Loss), before Reclassifications	(2.3)	7.1
Reclassification from Accumulated Other Comprehensive Income	0.0	(4.7)
Other Comprehensive Income (Loss)	(2.3)	2.4
Ending Balance	(10.5)	(17.1)
Accumulated Unrecognized Gain (Loss) on Derivatives
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(4.7)	(5.7)
Other Comprehensive Income (Loss), before Reclassifications	0.0	0.0
Reclassification from Accumulated Other Comprehensive Income	0.4	0.2
Other Comprehensive Income (Loss)	0.4	0.2
Ending Balance	(4.3)	(5.5)
Accumulated Unrecognized Gain (Loss) on Benefit Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(1.5)	(47.3)
Other Comprehensive Income (Loss), before Reclassifications	0.0	6.6
Reclassification from Accumulated Other Comprehensive Income	(0.5)	40.0
Other Comprehensive Income (Loss)	(0.5)	46.6
Ending Balance	(2.0)	(0.7)
Accumulated Unrecognized Gain on Equity Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	0.0	0.0
Other Comprehensive Income (Loss), before Reclassifications	0.0	13.4
Reclassification from Accumulated Other Comprehensive Income	0.0	0.0
Other Comprehensive Income (Loss)	0.0	13.4
Ending Balance	$ 0.0	$ 13.4
Retained Earnings | Accounting Standards Update 2016-01 [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description of Prior-period Information Retrospectively Adjusted	1.5