Restructuring - Summary of Charges Recorded in Connection with Restructuring by Reportable Segment (Detail) - USD ($) $ in Thousands		12 Months Ended
		May 31, 2024	May 31, 2023	May 31, 2022
Restructuring Cost and Reserve [Line Items]
Current Year Charges		$ 30,008	$ 15,465	$ 6,276
MAP 2025
Restructuring Cost and Reserve [Line Items]
Current Year Charges		30,008	11,660
Cumulative Costs to Date		41,668
Total Expected Costs		81,509
MAP 2025 | Severance and benefit costs (credits)
Restructuring Cost and Reserve [Line Items]
Current Year Charges		23,982	8,502
Cumulative Costs to Date		32,484
Total Expected Costs		46,600
MAP 2025 | Facility Closure and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges		1,471	621
Cumulative Costs to Date		2,092
Total Expected Costs		27,817
MAP 2025 | Other Restructuring Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges		4,555	2,537
Cumulative Costs to Date		7,092
Total Expected Costs		7,092
MAP 2025 | Construction Products Segment
Restructuring Cost and Reserve [Line Items]
Current Year Charges		9,719	6,092
Cumulative Costs to Date		15,811
Total Expected Costs		37,056
MAP 2025 | Construction Products Segment | Severance and benefit costs (credits)
Restructuring Cost and Reserve [Line Items]
Current Year Charges		9,111	6,092
Cumulative Costs to Date		15,203
Total Expected Costs		20,114
MAP 2025 | Construction Products Segment | Facility Closure and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges		608	0
Cumulative Costs to Date		608
Total Expected Costs		16,942
MAP 2025 | Performance Coatings Segment
Restructuring Cost and Reserve [Line Items]
Current Year Charges		7,438	3,685
Cumulative Costs to Date		11,123
Total Expected Costs		12,512
MAP 2025 | Performance Coatings Segment | Severance and benefit costs (credits)
Restructuring Cost and Reserve [Line Items]
Current Year Charges		2,711	1,148
Cumulative Costs to Date		3,859
Total Expected Costs		4,777
MAP 2025 | Performance Coatings Segment | Facility Closure and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges		172	0
Cumulative Costs to Date		172
Total Expected Costs		643
MAP 2025 | Performance Coatings Segment | Other Restructuring Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges	[1]	4,555	2,537
Cumulative Costs to Date	[1]	7,092
Total Expected Costs	[1]	7,092
MAP 2025 | Consumer Segment
Restructuring Cost and Reserve [Line Items]
Current Year Charges		9,422	1,128
Cumulative Costs to Date		10,550
Total Expected Costs		20,762
MAP 2025 | Consumer Segment | Severance and benefit costs (credits)
Restructuring Cost and Reserve [Line Items]
Current Year Charges		9,266	507
Cumulative Costs to Date		9,773
Total Expected Costs		17,087
MAP 2025 | Consumer Segment | Facility Closure and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges		156	621
Cumulative Costs to Date		777
Total Expected Costs		3,675
MAP 2025 | SPG Segments
Restructuring Cost and Reserve [Line Items]
Current Year Charges		3,429	805
Cumulative Costs to Date		4,234
Total Expected Costs		11,229
MAP 2025 | SPG Segments | Severance and benefit costs (credits)
Restructuring Cost and Reserve [Line Items]
Current Year Charges		2,894	805
Cumulative Costs to Date		3,699
Total Expected Costs		4,672
MAP 2025 | SPG Segments | Facility Closure and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges		535	0
Cumulative Costs to Date		535
Total Expected Costs		6,557
MAP 2025 | Corporate/Other Segment
Restructuring Cost and Reserve [Line Items]
Current Year Charges		0	(50)
Cumulative Costs to Date		(50)
Total Expected Costs		(50)
MAP 2025 | Corporate/Other Segment | Severance and benefit costs (credits)
Restructuring Cost and Reserve [Line Items]
Current Year Charges		0	$ (50)
Cumulative Costs to Date		(50)
Total Expected Costs		$ (50)

[1] Of the $4.6 million of other restructuring costs incurred during the year ended May 31, 2024, $3.3 million is associated with the impairment of an indefinite-lived tradename. The $2.5 million of other restructuring costs incurred during the year ended May 31, 2023, is associated with the impairment of an indefinite-lived tradename. See Note C, "Goodwill and Other Intangible Assets," of the Consolidated Financial Statements below for further description.