Restructuring and Repositioning Expenses, Asset Write Offs - Estimated and Actual Costs (Details) $ in Millions	Jun. 30, 2021 USD ($)
2021 Plan
Restructuring Cost and Reserve [Line Items]
Estimated capital expenditures	$ 6.0
Cost to date	13.8
Capital expenditures to date	0.0
2021 Plan | Minimum
Restructuring Cost and Reserve [Line Items]
Estimated costs	26.0
2021 Plan | Maximum
Restructuring Cost and Reserve [Line Items]
Estimated costs	29.0
2019 Plan
Restructuring Cost and Reserve [Line Items]
Cost to date	12.6
Capital expenditures to date	2.3
2019 Phase 2 Plan
Restructuring Cost and Reserve [Line Items]
Cost to date	33.8
Capital expenditures to date	0.4
Severance/employee costs | 2021 Plan
Restructuring Cost and Reserve [Line Items]
Cost to date	9.8
Severance/employee costs | 2021 Plan | Minimum
Restructuring Cost and Reserve [Line Items]
Estimated costs	11.0
Severance/employee costs | 2021 Plan | Maximum
Restructuring Cost and Reserve [Line Items]
Estimated costs	13.0
Severance/employee costs | 2019 Plan
Restructuring Cost and Reserve [Line Items]
Cost to date	0.9
Severance/employee costs | 2019 Phase 2 Plan
Restructuring Cost and Reserve [Line Items]
Cost to date	25.9
Asset Write Offs | 2021 Plan
Restructuring Cost and Reserve [Line Items]
Cost to date	2.4
Asset Write Offs | 2021 Plan | Minimum
Restructuring Cost and Reserve [Line Items]
Estimated costs	8.0
Asset Write Offs | 2021 Plan | Maximum
Restructuring Cost and Reserve [Line Items]
Estimated costs	9.0
Asset Write Offs | 2019 Plan
Restructuring Cost and Reserve [Line Items]
Cost to date	0.9
Asset Write Offs | 2019 Phase 2 Plan
Restructuring Cost and Reserve [Line Items]
Cost to date	0.6
Other Associated Costs | 2021 Plan
Restructuring Cost and Reserve [Line Items]
Estimated costs	5.0
Cost to date	1.1
Other Associated Costs | 2019 Plan
Restructuring Cost and Reserve [Line Items]
Cost to date	0.3
Other Associated Costs | 2019 Phase 2 Plan
Restructuring Cost and Reserve [Line Items]
Cost to date	0.0
Total Restructuring | 2021 Plan
Restructuring Cost and Reserve [Line Items]
Cost to date	13.3
Total Restructuring | 2021 Plan | Specialty Construction Chemicals
Restructuring Cost and Reserve [Line Items]
Cost to date	5.9
Total Restructuring | 2021 Plan | Specialty Building Materials
Restructuring Cost and Reserve [Line Items]
Cost to date	3.7
Total Restructuring | 2021 Plan | Corporate Function
Restructuring Cost and Reserve [Line Items]
Cost to date	3.7
Total Restructuring | 2021 Plan | Minimum
Restructuring Cost and Reserve [Line Items]
Estimated costs	24.0
Total Restructuring | 2021 Plan | Maximum
Restructuring Cost and Reserve [Line Items]
Estimated costs	27.0
Total Restructuring | 2019 Plan
Restructuring Cost and Reserve [Line Items]
Cost to date	2.1
Total Restructuring | 2019 Plan | Specialty Construction Chemicals
Restructuring Cost and Reserve [Line Items]
Cost to date	1.7
Total Restructuring | 2019 Plan | Specialty Building Materials
Restructuring Cost and Reserve [Line Items]
Cost to date	0.4
Total Restructuring | 2019 Phase 2 Plan
Restructuring Cost and Reserve [Line Items]
Cost to date	26.5
Total Restructuring | 2019 Phase 2 Plan | Specialty Construction Chemicals
Restructuring Cost and Reserve [Line Items]
Cost to date	7.1
Total Restructuring | 2019 Phase 2 Plan | Specialty Building Materials
Restructuring Cost and Reserve [Line Items]
Cost to date	7.0
Total Restructuring | 2019 Phase 2 Plan | Corporate Function
Restructuring Cost and Reserve [Line Items]
Cost to date	12.4
Repositioning
Restructuring Cost and Reserve [Line Items]
Estimated costs	2.0
Repositioning | 2021 Plan
Restructuring Cost and Reserve [Line Items]
Cost to date	0.5
Capital expenditures to date	0.3
Repositioning | 2019 Plan
Restructuring Cost and Reserve [Line Items]
Cost to date	10.5
Capital expenditures to date	10.5
Repositioning | 2019 Phase 2 Plan
Restructuring Cost and Reserve [Line Items]
Cost to date	7.3
Capital expenditures to date	$ 7.1