XML 81 R47.htm IDEA: XBRL DOCUMENT
v3.19.3

Restructuring - Additional Information (Detail) - 2020 MAP to Growth - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2019 | Aug. 31, 2018 | May 31, 2019
Restructuring Cost And Reserve [Line Items] |  |  |
Restructuring plan, expected to be formulated | During the second quarter ended November 30, 2018 |  |
Increase in current total expected costs | $ 17.5 |  |
Restructuring plan, anticipated to be completed | by the end of calendar year 2020 |  |
Performance Coatings Segment | Cost of Sales |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Inventory-related charges | $ 2.0 | $ 4.3 |
Consumer Segment | Cost of Sales |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Inventory-related charges | 0.9 |  |
Inventory-related charges, favorable adjustment |  |  | $ 0.2
Construction Products Segment | Cost of Sales |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Inventory-related charges | 0.3 | $ 0.2 |
Severance and Benefit Charges |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Increase in current total expected costs | 13.0 |  |
Facility Closure and Other Related Costs |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Increase in current total expected costs | $ 4.3 |  |

X
- Definition Inventory write down, offset adjustment. + References No definition available. + Details
Name: | rpm_InventoryWriteDownOffsetAdjustment
Namespace Prefix: | rpm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Restructuring and related activities, anticipated to be completed, description. + References No definition available. + Details
Name: | rpm_RestructuringAndRelatedActivitiesAnticipatedToBeCompletedDescription
Namespace Prefix: | rpm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Restructuring and related activities, expected to be formulated, period description. + References No definition available. + Details
Name: | rpm_RestructuringAndRelatedActivitiesExpectedToBeFormulatedPeriodDescription
Namespace Prefix: | rpm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Restructuring and related cost, increase to expected cost. + References No definition available. + Details
Name: | rpm_RestructuringAndRelatedCostIncreaseToExpectedCost
Namespace Prefix: | rpm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116847112&loc=d3e4542-108314 + Details
Name: | us-gaap_InventoryWriteDown
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RestructuringCostAndReserveLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RestructuringPlanAxis=rpm_TwoThousandAndTwentyMarginAccelerationPlanToGrowthPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=rpm_PerformanceCoatingsSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=rpm_ConsumerSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=rpm_ConstructionProductsSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=us-gaap_EmployeeSeveranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=us-gaap_FacilityClosingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |