Goodwill and Intangibles - Intangibles (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017	Dec. 31, 2017
Intangible assets subject to amortization
Gross Carrying Amount	$ 334.5		$ 335.6
Accumulated Amortization	(190.9)		(187.7)
Net Carrying Amount	143.6		147.9
Indefinite-lived intangible assets
Indefinite-lived intangible assets	37.3		37.3
Intangible assets
Gross Carrying Amount	371.8		372.9
Net Carrying Amount	180.9		185.2
Aggregate amortization expense for amortized intangible assets	5.6	$ 5.5
Patents
Intangible assets subject to amortization
Gross Carrying Amount	16.1		16.1
Accumulated Amortization	(15.6)		(15.4)
Net Carrying Amount	0.5		0.7
Customer relationships
Intangible assets subject to amortization
Gross Carrying Amount	233.9		233.2
Accumulated Amortization	(137.4)		(133.5)
Net Carrying Amount	96.5		99.7
Technology
Intangible assets subject to amortization
Gross Carrying Amount	54.0		53.9
Accumulated Amortization	(24.1)		(23.1)
Net Carrying Amount	29.9		30.8
Trade name
Intangible assets subject to amortization
Gross Carrying Amount	26.2		25.5
Accumulated Amortization	(10.3)		(9.7)
Net Carrying Amount	15.9		15.8
Other
Intangible assets subject to amortization
Gross Carrying Amount	4.3		6.9
Accumulated Amortization	(3.5)		(6.0)
Net Carrying Amount	$ 0.8		$ 0.9