Subsequent Events	9 Months Ended
Feb. 29, 2020
Subsequent Events [Abstract]
Subsequent Events	NOTE 19 — SUBSEQUENT EVENTS On March 11, 2020, subsequent to the balance sheet date, the World Health Organization characterized the outbreak of the coronavirus disease known as COVID-19 as a global pandemic and recommended containment and mitigation measures. We are actively monitoring the impact of the coronavirus outbreak, which will negatively impact our business and results of operations for our fiscal fourth quarter and likely beyond. The extent to which our operations will be impacted by the outbreak will depend largely on future developments, which are highly uncertain and cannot be accurately predicted, including new information which may emerge concerning the severity of the outbreak and actions by government authorities to contain the outbreak or treat its impact, among other things. As of April 8, 2020, we have repurchased 386,231 shares of RPM common stock since February 29, 2020, at a cost of approximately $25.0 million, or an average of $64.73, under the stock repurchase program described in Note 11. Given recent macroeconomic uncertainty resulting from the COVID-19 pandemic, we have suspended our share buyback program.

Subsequent Events

9 Months Ended

Feb. 29, 2020

NOTE 19 — SUBSEQUENT EVENTS

On March 11, 2020, subsequent to the balance sheet date, the World Health Organization characterized the outbreak of the coronavirus disease known as COVID-19 as a global pandemic and recommended containment and mitigation measures. We are actively monitoring the impact of the coronavirus outbreak, which will negatively impact our business and results of operations for our fiscal fourth quarter and likely beyond. The extent to which our operations will be impacted by the outbreak will depend largely on future developments, which are highly uncertain and cannot be accurately predicted, including new information which may emerge concerning the severity of the outbreak and actions by government authorities to contain the outbreak or treat its impact, among other things.

As of April 8, 2020, we have repurchased 386,231 shares of RPM common stock since February 29, 2020, at a cost of approximately $25.0 million, or an average of $64.73, under the stock repurchase program described in Note 11. Given recent macroeconomic uncertainty resulting from the COVID-19 pandemic, we have suspended our share buyback program.