Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Stockholders' Equity (Parenthetical)

v3.19.2
Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares
12 Months Ended
May 31, 2019
May 31, 2018
May 31, 2017
Consolidated Statements of Stockholders' Equity [Abstract]      
Cash dividends per share $ 2.30 $ 2.06 $ 1.84