Goodwill and Intangibles - Intangibles (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017	Dec. 31, 2017
Intangible assets subject to amortization
Gross Carrying Amount	$ 334.1		$ 334.1		$ 335.6
Accumulated Amortization	(196.1)		(196.1)		(187.7)
Net Carrying Amount	138.0		138.0		147.9
Indefinite-lived intangible assets
Indefinite-lived intangible assets	36.3		36.3		37.3
Intangible assets
Gross Carrying Amount	370.4		370.4		372.9
Net Carrying Amount	174.3		174.3		185.2
Aggregate amortization expense for amortized intangible assets	5.1	$ 5.6	10.7	$ 11.1
Patents
Intangible assets subject to amortization
Gross Carrying Amount	16.1		16.1		16.1
Accumulated Amortization	(15.7)		(15.7)		(15.4)
Net Carrying Amount	0.4		0.4		0.7
Customer relationships
Intangible assets subject to amortization
Gross Carrying Amount	233.1		233.1		233.2
Accumulated Amortization	(141.1)		(141.1)		(133.5)
Net Carrying Amount	92.0		92.0		99.7
Technology
Intangible assets subject to amortization
Gross Carrying Amount	54.6		54.6		53.9
Accumulated Amortization	(25.1)		(25.1)		(23.1)
Net Carrying Amount	29.5		29.5		30.8
Trade name
Intangible assets subject to amortization
Gross Carrying Amount	26.0		26.0		25.5
Accumulated Amortization	(10.7)		(10.7)		(9.7)
Net Carrying Amount	15.3		15.3		15.8
Other
Intangible assets subject to amortization
Gross Carrying Amount	4.3		4.3		6.9
Accumulated Amortization	(3.5)		(3.5)		(6.0)
Net Carrying Amount	$ 0.8		$ 0.8		$ 0.9