Summary of Charges Recorded in Connection with Restructuring by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Restructuring Cost And Reserve [Line Items]
Current Year Charges	$ 3,129	$ 7,343	$ 12,280	$ 18,766
MAP to Growth
Restructuring Cost And Reserve [Line Items]
Current Year Charges	3,129	7,343	12,280	18,766
Cumulative Costs to Date	105,212		105,212
Total Expected Costs	113,155		113,155
MAP to Growth | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	574	4,816	5,187	11,331
Cumulative Costs to Date	67,410		67,410
Total Expected Costs	71,181		71,181
MAP to Growth | Other Restructuring Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	(60)	362	669	677
Cumulative Costs to Date	8,451		8,451
Total Expected Costs	8,481		8,481
MAP to Growth | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	2,615	2,165	6,424	6,758
Cumulative Costs to Date	29,351		29,351
Total Expected Costs	33,493		33,493
MAP to Growth | Construction Products Segment
Restructuring Cost And Reserve [Line Items]
Current Year Charges	860	2,734	3,340	5,178
Cumulative Costs to Date	27,851		27,851
Total Expected Costs	29,210		29,210
MAP to Growth | Construction Products Segment | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	255	2,018	1,829	3,625
Cumulative Costs to Date	19,923		19,923
Total Expected Costs	20,615		20,615
MAP to Growth | Construction Products Segment | Other Restructuring Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	(60)	232	38	271
Cumulative Costs to Date	1,978		1,978
Total Expected Costs	1,978		1,978
MAP to Growth | Construction Products Segment | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	665	484	1,473	1,282
Cumulative Costs to Date	5,950		5,950
Total Expected Costs	6,617		6,617
MAP to Growth | Performance Coatings Segment
Restructuring Cost And Reserve [Line Items]
Current Year Charges	383	1,361	3,281	5,209
Cumulative Costs to Date	22,614		22,614
Total Expected Costs	24,889		24,889
MAP to Growth | Performance Coatings Segment | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	118	477	1,959	3,408
Cumulative Costs to Date	15,344		15,344
Total Expected Costs	16,748		16,748
MAP to Growth | Performance Coatings Segment | Other Restructuring Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges		122	213	294
Cumulative Costs to Date	814		814
Total Expected Costs	814		814
MAP to Growth | Performance Coatings Segment | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	265	762	1,109	1,507
Cumulative Costs to Date	6,456		6,456
Total Expected Costs	7,327		7,327
MAP to Growth | Consumer Segment
Restructuring Cost And Reserve [Line Items]
Current Year Charges	1,311	1,016	3,781	3,423
Cumulative Costs to Date	27,304		27,304
Total Expected Costs	28,871		28,871
MAP to Growth | Consumer Segment | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	11	445	797	1,992
Cumulative Costs to Date	11,264		11,264
Total Expected Costs	11,836		11,836
MAP to Growth | Consumer Segment | Other Restructuring Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges		8	302	8
Cumulative Costs to Date	4,421		4,421
Total Expected Costs	4,451		4,451
MAP to Growth | Consumer Segment | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	1,300	563	2,682	1,423
Cumulative Costs to Date	11,619		11,619
Total Expected Costs	12,584		12,584
MAP to Growth | Specialty Products Group ("SPG") Segment
Restructuring Cost And Reserve [Line Items]
Current Year Charges	434	999	1,737	3,707
Cumulative Costs to Date	13,955		13,955
Total Expected Costs	16,697		16,697
MAP to Growth | Specialty Products Group ("SPG") Segment | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	49	643	461	1,057
Cumulative Costs to Date	7,391		7,391
Total Expected Costs	8,494		8,494
MAP to Growth | Specialty Products Group ("SPG") Segment | Other Restructuring Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges			116	104
Cumulative Costs to Date	1,238		1,238
Total Expected Costs	1,238		1,238
MAP to Growth | Specialty Products Group ("SPG") Segment | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	385	356	1,160	2,546
Cumulative Costs to Date	5,326		5,326
Total Expected Costs	6,965		6,965
MAP to Growth | Corporate/Other Segment
Restructuring Cost And Reserve [Line Items]
Current Year Charges	141	1,233	141	1,249
Cumulative Costs to Date	13,488		13,488
Total Expected Costs	13,488		13,488
MAP to Growth | Corporate/Other Segment | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	141	$ 1,233	141	$ 1,249
Cumulative Costs to Date	13,488		13,488
Total Expected Costs	$ 13,488		$ 13,488