Restructuring - Summary of Charges Recorded in Connection with Restructuring by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2025	Aug. 31, 2024
Restructuring Cost and Reserve [Line Items]
Current Year Charges	$ 8,814	$ 7,202
MAP 2025
Restructuring Cost and Reserve [Line Items]
Current Year Charges	8,814	7,202
Cumulative Costs to Date	75,461
Total Expected Costs	89,317
MAP 2025 | Severance and benefit costs (credits)
Restructuring Cost and Reserve [Line Items]
Current Year Charges	7,076	6,459
Cumulative Costs to Date	57,253
Total Expected Costs	63,668
MAP 2025 | Facility Closure and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges	1,738	743
Cumulative Costs to Date	10,584
Total Expected Costs	18,025
MAP 2025 | Other Restructuring Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges	0	0
Cumulative Costs to Date	7,624
Total Expected Costs	7,624
MAP 2025 | Construction Products Segment
Restructuring Cost and Reserve [Line Items]
Current Year Charges	2,596	1,266
Cumulative Costs to Date	24,692
Total Expected Costs	34,548
MAP 2025 | Construction Products Segment | Severance and benefit costs (credits)
Restructuring Cost and Reserve [Line Items]
Current Year Charges	1,941	890
Cumulative Costs to Date	21,659
Total Expected Costs	26,757
MAP 2025 | Construction Products Segment | Facility Closure and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges	655	376
Cumulative Costs to Date	3,033
Total Expected Costs	7,791
MAP 2025 | Performance Coatings Segment
Restructuring Cost and Reserve [Line Items]
Current Year Charges	3,943	823
Cumulative Costs to Date	24,365
Total Expected Costs	25,531
MAP 2025 | Performance Coatings Segment | Severance and benefit costs (credits)
Restructuring Cost and Reserve [Line Items]
Current Year Charges	3,307	482
Cumulative Costs to Date	13,645
Total Expected Costs	13,837
MAP 2025 | Performance Coatings Segment | Facility Closure and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges	636	341
Cumulative Costs to Date	3,628
Total Expected Costs	4,602
MAP 2025 | Performance Coatings Segment | Other Restructuring Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges	0	0
Cumulative Costs to Date	7,092
Total Expected Costs	7,092
MAP 2025 | Consumer Segment
Restructuring Cost and Reserve [Line Items]
Current Year Charges	2,275	5,113
Cumulative Costs to Date	26,454
Total Expected Costs	29,288
MAP 2025 | Consumer Segment | Severance and benefit costs (credits)
Restructuring Cost and Reserve [Line Items]
Current Year Charges	1,828	5,087
Cumulative Costs to Date	21,999
Total Expected Costs	23,124
MAP 2025 | Consumer Segment | Facility Closure and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges	447	26
Cumulative Costs to Date	3,923
Total Expected Costs	5,632
MAP 2025 | Consumer Segment | Other Restructuring Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges	0	0
Cumulative Costs to Date	532
Total Expected Costs	532
MAP 2025 | Corporate/Other
Restructuring Cost and Reserve [Line Items]
Current Year Charges	0	0
Cumulative Costs to Date	(50)
Total Expected Costs	(50)
MAP 2025 | Corporate/Other | Severance and benefit costs (credits)
Restructuring Cost and Reserve [Line Items]
Current Year Charges	0	$ 0
Cumulative Costs to Date	(50)
Total Expected Costs	$ (50)