Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Oct. 01, 2020	Sep. 30, 2021	Oct. 01, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (113.6)	$ (155.5)	$ (420.5)	$ (574.4)
Foreign currency translation adjustments	(11.6)	17.3	(7.7)	(15.6)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	7.6	23.8	3.8	(3.0)
Unrealized foreign exchange gain (loss) on intercompany loan, net of tax effect of $0.3 and ($0.4) for the three months ended, respectively, and $0.2 and $0.4 for the nine months ended, respectively	(0.9)	1.4	(0.6)	(1.2)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	(6.2)	0.0	(5.5)	(10.9)
Total other comprehensive (loss) gain	(11.2)	51.7	(9.2)	(20.4)
Total comprehensive loss	(124.8)	(103.8)	(429.7)	(594.8)
Interest Rate Swap [Member]
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	0.0	9.2	0.9	10.3
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	0.0	$ (9.2)	(0.9)	$ (10.3)
Foreign Exchange Forward
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	(0.1)		(0.1)
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	$ 0.1		$ 0.1