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Contingencies and Other Accrued Losses - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Aug. 31, 2014 Complaint | May 31, 2014 | May 31, 2010 | May 31, 2013
Schedule Of Commitments And Contingencies [Line Items] |  |  |  |
Accrued contingencies |  |  |  | $ 65.1
Payment for contingent liabilities |  | 61.9 |  |
Expected payment to resolve issues arising out of investigation and other related costs |  | 2.1 |  |
Miscellaneous expenses |  | $ 1.1 | $ 42.6 |
Number of complaints filed against Rust-Oleum and RPM International | 2 |  |  |

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- Details
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- Definition The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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