Restructuring - Summary of Charges Recorded in Connection with Restructuring by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Nov. 30, 2024	Nov. 30, 2023		Nov. 30, 2024	Nov. 30, 2023
Restructuring Cost and Reserve [Line Items]
Current Year Charges	$ 7,557	$ 1,239		$ 14,759	$ 7,737
MAP 2025
Restructuring Cost and Reserve [Line Items]
Current Year Charges	7,557	1,239		14,759	7,737
Cumulative Costs to Date	56,427			56,427
Total Expected Costs	69,749			69,749
MAP 2025 | Severance and benefit costs (credits)
Restructuring Cost and Reserve [Line Items]
Current Year Charges	5,682	1,117		12,141	3,016
Cumulative Costs to Date	44,625			44,625
Total Expected Costs	49,390			49,390
MAP 2025 | Facility Closure and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges	1,875	122		2,618	166
Cumulative Costs to Date	4,710			4,710
Total Expected Costs	13,267			13,267
MAP 2025 | Other Restructuring Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges	0	0		0	4,555
Cumulative Costs to Date	7,092			7,092
Total Expected Costs	7,092			7,092
MAP 2025 | Construction Products Segment
Restructuring Cost and Reserve [Line Items]
Current Year Charges	1,232	387		2,498	802
Cumulative Costs to Date	18,309			18,309
Total Expected Costs	26,804			26,804
MAP 2025 | Construction Products Segment | Severance and benefit costs (credits)
Restructuring Cost and Reserve [Line Items]
Current Year Charges	938	387		1,828	802
Cumulative Costs to Date	17,031			17,031
Total Expected Costs	20,306			20,306
MAP 2025 | Construction Products Segment | Facility Closure and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges	294			670
Cumulative Costs to Date	1,278			1,278
Total Expected Costs	6,498			6,498
MAP 2025 | Performance Coatings Segment
Restructuring Cost and Reserve [Line Items]
Current Year Charges	924	306		1,079	5,722
Cumulative Costs to Date	12,202			12,202
Total Expected Costs	14,076			14,076
MAP 2025 | Performance Coatings Segment | Severance and benefit costs (credits)
Restructuring Cost and Reserve [Line Items]
Current Year Charges	917	213		1,067	1,044
Cumulative Costs to Date	4,926			4,926
Total Expected Costs	5,491			5,491
MAP 2025 | Performance Coatings Segment | Facility Closure and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges	7	93		12	123
Cumulative Costs to Date	184			184
Total Expected Costs	1,493			1,493
MAP 2025 | Performance Coatings Segment | Other Restructuring Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges	0	0	[1]	0	4,555	[1]
Cumulative Costs to Date	7,092			7,092
Total Expected Costs	7,092			7,092
MAP 2025 | Consumer Segment
Restructuring Cost and Reserve [Line Items]
Current Year Charges	3,855	35		7,813	49
Cumulative Costs to Date	18,363			18,363
Total Expected Costs	20,212			20,212
MAP 2025 | Consumer Segment | Severance and benefit costs (credits)
Restructuring Cost and Reserve [Line Items]
Current Year Charges	3,418	35		7,356	35
Cumulative Costs to Date	17,129			17,129
Total Expected Costs	18,014			18,014
MAP 2025 | Consumer Segment | Facility Closure and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges	437			457	14
Cumulative Costs to Date	1,234			1,234
Total Expected Costs	2,198			2,198
MAP 2025 | Specialty Products Group Segment
Restructuring Cost and Reserve [Line Items]
Current Year Charges	1,546	511		3,369	1,164
Cumulative Costs to Date	7,603			7,603
Total Expected Costs	8,707			8,707
MAP 2025 | Specialty Products Group Segment | Severance and benefit costs (credits)
Restructuring Cost and Reserve [Line Items]
Current Year Charges	409	482		1,890	1,135
Cumulative Costs to Date	5,589			5,589
Total Expected Costs	5,629			5,629
MAP 2025 | Specialty Products Group Segment | Facility Closure and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges	1,137	29		1,479	29
Cumulative Costs to Date	2,014			2,014
Total Expected Costs	3,078			3,078
MAP 2025 | Corporate/Other Segment
Restructuring Cost and Reserve [Line Items]
Current Year Charges	0	1,239		0	7,737
Cumulative Costs to Date	(50)			(50)
Total Expected Costs	(50)			(50)
MAP 2025 | Corporate/Other Segment | Severance and benefit costs (credits)
Restructuring Cost and Reserve [Line Items]
Current Year Charges	0	1,117		0	3,016
Cumulative Costs to Date	(50)			(50)
Total Expected Costs	$ (50)			$ (50)
MAP 2025 | Corporate/Other Segment | Facility Closure and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges		122			166
MAP 2025 | Corporate/Other Segment | Other Restructuring Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges		$ 0			$ 4,555

[1] Of the $4.6 million of other restructuring costs incurred for the six-month period ending November 30, 2023, $3.3 million is associated with the impairment of an indefinite-lived tradename as described above.