Summary of Charges Recorded in Connection with Restructuring by Reportable Segment (Detail) $ in Thousands	3 Months Ended	6 Months Ended
	Nov. 30, 2018 USD ($)	Nov. 30, 2018 USD ($)
Restructuring Cost And Reserve [Line Items]
Current Year Charges	$ 7,724	$ 27,800
2020 MAP to Growth
Restructuring Cost And Reserve [Line Items]
Current Year Charges	7,724	27,800
Cumulative Costs to Date	45,313	45,313
Total Expected Costs	79,253	79,253
2020 MAP to Growth | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	6,533	25,595
Cumulative Costs to Date	35,555	35,555
Total Expected Costs	39,130	39,130
2020 MAP to Growth | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	1,037	1,473
Cumulative Costs to Date	7,656	7,656
Total Expected Costs	38,021	38,021
2020 MAP to Growth | Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	154	732
Cumulative Costs to Date	2,102	2,102
Total Expected Costs	2,102	2,102
2020 MAP to Growth | Consumer Segment
Restructuring Cost And Reserve [Line Items]
Current Year Charges	451	2,002
Cumulative Costs to Date	12,793	12,793
Total Expected Costs	21,157	21,157
2020 MAP to Growth | Consumer Segment | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	279	1,830
Cumulative Costs to Date	7,482	7,482
Total Expected Costs	8,710	8,710
2020 MAP to Growth | Consumer Segment | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	170	170
Cumulative Costs to Date	5,309	5,309
Total Expected Costs	12,445	12,445
2020 MAP to Growth | Consumer Segment | Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	2	2
Cumulative Costs to Date	2	2
Total Expected Costs	2	2
2020 MAP to Growth | Industrial Segment
Restructuring Cost And Reserve [Line Items]
Current Year Charges	4,423	11,802
Cumulative Costs to Date	16,388	16,388
Total Expected Costs	36,293	36,293
2020 MAP to Growth | Industrial Segment | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	3,407	9,772
Cumulative Costs to Date	11,944	11,944
Total Expected Costs	12,396	12,396
2020 MAP to Growth | Industrial Segment | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	867	1,303
Cumulative Costs to Date	2,347	2,347
Total Expected Costs	21,800	21,800
2020 MAP to Growth | Industrial Segment | Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	149	727
Cumulative Costs to Date	2,097	2,097
Total Expected Costs	2,097	2,097
2020 MAP to Growth | Specialty Segment
Restructuring Cost And Reserve [Line Items]
Current Year Charges	1,789	3,936
Cumulative Costs to Date	3,936	3,936
Total Expected Costs	9,146	9,146
2020 MAP to Growth | Specialty Segment | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	1,786	3,933
Cumulative Costs to Date	3,933	3,933
Total Expected Costs	5,367	5,367
2020 MAP to Growth | Specialty Segment | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Total Expected Costs	3,776	3,776
2020 MAP to Growth | Specialty Segment | Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	3	3
Cumulative Costs to Date	3	3
Total Expected Costs	3	3
2020 MAP to Growth | Corporate/Other Segment
Restructuring Cost And Reserve [Line Items]
Current Year Charges	1,061	10,060
Cumulative Costs to Date	12,196	12,196
Total Expected Costs	12,657	12,657
2020 MAP to Growth | Corporate/Other Segment | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	1,061	10,060
Cumulative Costs to Date	12,196	12,196
Total Expected Costs	$ 12,657	$ 12,657