Accumulated Other Comprehensive Income (Changes in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance AOCI	$ (124.1)	$ (111.5)	$ (130.6)	$ (102.1)
Accumulated other comprehensive loss	(118.9)	(111.5)	(118.9)	(111.5)
Other comprehensive income (loss) before reclassifications	0.7	0.8	4.1	(9.0)
Amounts reclassified from AOCI	5.9	(0.7)	9.9	(0.3)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Tax	(1.4)	(0.1)	(2.3)	(0.1)
Net reclassifications	4.5	(0.8)	7.6	(0.4)
Other Comprehensive Income (Loss), Net of Tax	5.4	0.1	11.6	(10.5)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(5.2)	0.0	(11.7)	9.4
Ending balance AOCI	(118.9)	(111.5)	(118.9)	(111.5)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance AOCI	(38.4)	(58.5)	(36.8)	(47.6)
Accumulated other comprehensive loss	(35.9)	(55.9)	(35.9)	(55.9)
Other comprehensive income (loss) before reclassifications	2.5	2.6	0.9	(8.3)
Amounts reclassified from AOCI	0.0	0.0	0.0	0.0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Tax	0.0	0.0	0.0	0.0
Net reclassifications	0.0	0.0	0.0	0.0
Other Comprehensive Income (Loss), Net of Tax	(2.5)	(2.6)	(0.9)	8.3
Ending balance AOCI	(35.9)	(55.9)	(35.9)	(55.9)
Derivatives [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance AOCI	(14.9)	(5.6)	(20.3)	(5.8)
Accumulated other comprehensive loss	(14.9)	(9.5)	(14.9)	(9.5)
Other comprehensive income (loss) before reclassifications	(1.8)	(1.8)	3.2	(0.7)
Amounts reclassified from AOCI	2.4	(2.4)	3.0	(3.6)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Tax	(0.6)	0.3	(0.8)	0.6
Net reclassifications	1.8	(2.1)	2.2	(3.0)
Other Comprehensive Income (Loss), Net of Tax	0.0	3.9	(5.4)	3.7
Ending balance AOCI	(14.9)	(9.5)	(14.9)	(9.5)
Pension adjustments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance AOCI	(70.8)	(47.4)	(73.5)	(48.7)
Accumulated other comprehensive loss	(68.1)	(46.1)	(68.1)	(46.1)
Other comprehensive income (loss) before reclassifications	0.0	0.0	0.0	0.0
Amounts reclassified from AOCI	3.5	1.7	6.9	3.3
Reclassification from Accumulated Other Comprehensive Income, Current Period, Tax	(0.8)	(0.4)	(1.5)	(0.7)
Net reclassifications	2.7	1.3	5.4	2.6
Other Comprehensive Income (Loss), Net of Tax	(2.7)	(1.3)	(5.4)	(2.6)
Ending balance AOCI	$ (68.1)	$ (46.1)	$ (68.1)	$ (46.1)