Segment and Related Information (Details) $ in Millions	3 Months Ended
	Apr. 03, 2016 USD ($) Segment	Mar. 29, 2015 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment	5
Net Sales	$ 410.2	$ 453.3
Income from Operations	57.6	59.9
Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	410.2	453.3
Income from Operations	60.6	65.1
Specialty Minerals [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	155.6	154.0
Income from Operations	25.7	23.1
Refractories [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	69.2	73.9
Income from Operations	6.8	8.3
Performance Materials [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	119.0	127.9
Income from Operations	23.8	23.8
Construction Technologies [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	40.6	38.9
Income from Operations	4.4	4.1
Energy Services [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	25.8	58.6
Income from Operations	$ (0.1)	$ 5.8