Stock-Based Compensation - Stock Options Granted and Outstanding (Details) - $ / shares	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021	May 31, 2020
Shares
Outstanding, beginning of period (in shares)	5,087,402	6,055,524	7,105,399
Granted (in shares)	579,146	531,963	747,550
Canceled (in shares)	(1,710)	(877)	(1,452)
Forfeited (in shares)	(162,598)	(260,249)	(91,722)
Exercised (in shares)	(1,074,488)	(1,238,959)	(1,704,251)
Outstanding, end of period (in shares)	4,427,752	5,087,402	6,055,524
Options exercisable (in shares)	1,546,346	1,575,999	1,548,867	1,913,374
Weighted Average Exercise Price
Outstanding, beginning of period (in dollars per share)	$ 230.62	$ 191.11	$ 145.54
Granted (in dollars per share)	464.91	398.92	348.24
Canceled (in dollars per share)	65.79	116.25	59.51
Forfeited (in dollars per share)	339.49	273.53	193.94
Exercised (in dollars per share)	145.19	118.21	83.31
Outstanding, end of period (in dollars per share)	$ 278.01	$ 230.62	$ 191.11