Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements of Stockholders' Equity (Parenthetical)

v3.20.1
Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares
 3 Months Ended 9 Months Ended
Feb. 29, 2020
Feb. 28, 2019
Feb. 29, 2020
Feb. 28, 2019
Consolidated Statements of Stockholders' Equity [Abstract]        
Cash dividends per share $ 0.62 $ 0.56 $ 1.86 $ 1.68