Segment and Related Information, Restated Financial Results for Performance Materials Segment (Details) - USD ($) $ in Millions	3 Months Ended					12 Months Ended
	Apr. 04, 2021	Dec. 31, 2020	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Dec. 31, 2020
Segment and Related Information [Abstract]
Net sales	$ 452.6				$ 417.5
Income from operations	58.8				$ 57.7
% of Sales		14.10%	13.80%	11.70%	12.90%	13.20%
Metalcasting [Member]
Segment and Related Information [Abstract]
Net sales	81.7				$ 61.7
Household, Personal Care & Specialty Products [Member]
Segment and Related Information [Abstract]
Net sales	109.4				96.2
Environmental Products [Member]
Segment and Related Information [Abstract]
Net sales	26.0				36.7
Building Materials [Member]
Segment and Related Information [Abstract]
Net sales	13.8				16.8
Performance Materials [Member]
Segment and Related Information [Abstract]
Net sales	230.9	$ 219.0	$ 203.9	$ 191.5	211.4	$ 825.8
Income from operations		30.9	28.2	22.4	27.3	108.8
Performance Materials [Member] | Metalcasting [Member]
Segment and Related Information [Abstract]
Net sales	81.7	77.3	66.3	52.8	61.7	258.1
Performance Materials [Member] | Household, Personal Care & Specialty Products [Member]
Segment and Related Information [Abstract]
Net sales	109.4	102.2	93.9	87.9	96.2	380.2
Performance Materials [Member] | Environmental Products [Member]
Segment and Related Information [Abstract]
Net sales	26.0	27.1	30.2	37.6	36.7	131.6
Performance Materials [Member] | Building Materials [Member]
Segment and Related Information [Abstract]
Net sales	$ 13.8	$ 12.4	$ 13.5	$ 13.2	$ 16.8	$ 55.9