Restructuring - Summary of Charges Recorded in Connection with Restructuring by Reportable Segment (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Nov. 30, 2024	Nov. 30, 2023		Aug. 31, 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
MAP 2025 | Other Restructuring Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges	0	0			0	4,555
MAP 2025 | Performance Coatings Segment
Restructuring Cost and Reserve [Line Items]
Current Year Charges	924	306			1,079	5,722
MAP 2025 | Performance Coatings Segment | Other Restructuring Costs
Restructuring Cost and Reserve [Line Items]
Current Year Charges	$ 0	$ 0	[1]		$ 0	4,555	[1]
MAP 2025 | Performance Coatings Segment | Trade name | Other Restructuring Costs
Restructuring Cost and Reserve [Line Items]
Impairment of indefinite-lived assets				$ 3,300		$ 3,300

[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.