Subsequent Event - Additional Information (Detail) - Term Loan - USD ($) $ in Millions		9 Months Ended
Dec. 27, 2023	Feb. 29, 2024
Subsequent Event [Line Items]
Principal outstanding on term loan, prepaid	$ 250.0
Term loan, maturity date		Aug. 01, 2025

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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-Name Accounting Standards Codification
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=rpm_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: