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v3.20.2

Summary of Charges Recorded in Connection with Restructuring by Reportable Segment (Parenthetical) (Detail) | 12 Months Ended
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May 31, 2020 USD ($) Position | May 31, 2019 USD ($) Position Executive | May 31, 2018 USD ($) Position
Restructuring Cost And Reserve [Line Items] |  |  |
Restructuring charges | $ 33,108,000 | $ 42,310,000 | $ 17,514,000
2020 MAP to Growth |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Restructuring charges | 33,108,000 | 42,310,000 | 17,514,000
2020 MAP to Growth | Severance and Benefit Costs |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Restructuring charges | $ 19,747,000 | $ 32,519,000 | $ 9,957,000
Construction Products Segment | 2020 MAP to Growth Related to Current Elimination | Severance and Benefit Costs |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Number of positions eliminated | Position | 112 | 109 | 27
Construction Products Segment | 2020 MAP to Growth Plan Related to Legal Function |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Number of positions eliminated | Position |  | 1 |
Restructuring charges |  | $ 200,000 |
Construction Products Segment | 2020 MAP to Growth |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Restructuring charges | $ 8,726,000 | 11,598,000 | $ 4,187,000
Construction Products Segment | 2020 MAP to Growth | Severance and Benefit Costs |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Restructuring charges | 6,866,000 | 9,459,000 | 1,769,000
Performance Coatings Segment | 2020 MAP to Growth |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Restructuring charges | $ 9,094,000 | $ 9,839,000 | $ 400,000
Performance Coatings Segment | 2020 MAP to Growth | Severance and Benefit Costs |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Number of positions eliminated | Position | 161 | 114 | 1
Restructuring charges | $ 6,973,000 | $ 6,012,000 | $ 400,000
Corporate/Other Segment |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Number of positions eliminated | Position | 2 |  |
Corporate/Other Segment | 2020 MAP to Growth |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Restructuring charges | $ 1,227,000 | 9,984,000 | 2,136,000
Corporate/Other Segment | 2020 MAP to Growth | Severance and Benefit Costs |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Restructuring charges | 1,227,000 | $ 9,984,000 | 2,136,000
Number of corporate executives | Executive |  | 2 |
Corporate/Other Segment | 2020 MAP to Growth | Vesting Equity Awards |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Number of corporate executives | Executive |  | 2 |
Consumer Segment | 2020 MAP to Growth |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Restructuring charges | $ 9,428,000 | $ 3,304,000 | $ 10,791,000
Consumer Segment | 2020 MAP to Growth | Severance and Benefit Costs |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Number of positions eliminated | Position | 92 | 21 | 155
Restructuring charges | $ 3,089,000 | $ 1,726,000 | $ 5,652,000
CPG Segment | 2020 MAP to Growth |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Number of corporate executives | Executive |  | 3 |
SPG reportable segment |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Restructuring charges |  |  | $ 0
SPG reportable segment | 2020 MAP to Growth |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Restructuring charges | $ 4,633,000 | $ 7,585,000 |
Number of corporate executives | Executive |  | 4 |
SPG reportable segment | 2020 MAP to Growth | Severance and Benefit Costs |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Number of positions eliminated | Position | 94 | 130 |
Restructuring charges | $ 1,592,000 | $ 5,338,000 |

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