Summary of Charges Recorded in Connection with Restructuring by Reportable Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Restructuring Cost And Reserve [Line Items]
Current Year Charges	$ 18,106	$ 33,108	$ 42,310
MAP to Growth
Restructuring Cost And Reserve [Line Items]
Current Year Charges	18,106	33,108	42,310
Cumulative Costs to Date	111,035
Total Expected Costs	118,374
MAP to Growth | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	9,396	19,747	32,519
Cumulative Costs to Date	71,619
Total Expected Costs	73,783
MAP to Growth | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	7,956	8,548	8,195
Cumulative Costs to Date	30,880
Total Expected Costs	36,055
MAP to Growth | Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	754	4,813	1,596
Cumulative Costs to Date	8,536
Total Expected Costs	8,536
MAP to Growth | Construction Products Segment
Restructuring Cost And Reserve [Line Items]
Current Year Charges	5,335	8,726	11,598
Cumulative Costs to Date	29,846
Total Expected Costs	31,348
MAP to Growth | Construction Products Segment | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	3,194	6,866	9,459
Cumulative Costs to Date	21,288
Total Expected Costs	21,534
MAP to Growth | Construction Products Segment | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	2,103	1,508	1,924
Cumulative Costs to Date	6,580
Total Expected Costs	7,836
MAP to Growth | Construction Products Segment | Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	38	352	215
Cumulative Costs to Date	1,978
Total Expected Costs	1,978
MAP to Growth | Performance Coatings Segment
Restructuring Cost And Reserve [Line Items]
Current Year Charges	4,572	9,094	9,839
Cumulative Costs to Date	23,905
Total Expected Costs	25,552
MAP to Growth | Performance Coatings Segment | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	2,974	6,973	6,012
Cumulative Costs to Date	16,359
Total Expected Costs	16,900
MAP to Growth | Performance Coatings Segment | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	1,282	1,873	3,474
Cumulative Costs to Date	6,629
Total Expected Costs	7,735
MAP to Growth | Performance Coatings Segment | Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	316	248	353
Cumulative Costs to Date	917
Total Expected Costs	917
MAP to Growth | Consumer Segment
Restructuring Cost And Reserve [Line Items]
Current Year Charges	5,288	9,428	3,304
Cumulative Costs to Date	28,808
Total Expected Costs	30,751
MAP to Growth | Consumer Segment | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	1,840	3,089	1,726
Cumulative Costs to Date	12,307
Total Expected Costs	12,307
MAP to Growth | Consumer Segment | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	3,147	2,245	1,553
Cumulative Costs to Date	12,081
Total Expected Costs	14,024
MAP to Growth | Consumer Segment | Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	301	4,094	25
Cumulative Costs to Date	4,420
Total Expected Costs	4,420
MAP to Growth | SPG Segments
Restructuring Cost And Reserve [Line Items]
Current Year Charges	2,720	4,633	7,585
Cumulative Costs to Date	14,938
Total Expected Costs	17,185
MAP to Growth | SPG Segments | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	1,197	1,592	5,338
Cumulative Costs to Date	8,127
Total Expected Costs	9,504
MAP to Growth | SPG Segments | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	1,424	2,922	1,244
Cumulative Costs to Date	5,590
Total Expected Costs	6,460
MAP to Growth | SPG Segments | Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	99	119	1,003
Cumulative Costs to Date	1,221
Total Expected Costs	1,221
MAP to Growth | Corporate/Other Segment
Restructuring Cost And Reserve [Line Items]
Current Year Charges	191	1,227	9,984
Cumulative Costs to Date	13,538
Total Expected Costs	13,538
MAP to Growth | Corporate/Other Segment | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	191	$ 1,227	$ 9,984
Cumulative Costs to Date	13,538
Total Expected Costs	$ 13,538