Operating Segment and Geographic Information - Schedule of Operating Segment Data (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net Sales
Net sales	$ 266.9	$ 296.3	$ 755.2	$ 849.3
Segment Operating Income
Operating income	45.7	47.0	106.0	115.4
Specialty Construction Chemicals
Net Sales
Net sales	151.8	165.4	433.9	487.4
Segment Operating Income
Operating income	19.8	12.7	41.9	31.2
Specialty Building Materials
Net Sales
Net sales	115.1	130.9	321.3	361.9
Segment Operating Income
Operating income	$ 25.9	$ 34.3	$ 64.1	$ 84.2