Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Nov. 30, 2025	Aug. 31, 2025	Nov. 30, 2024	Aug. 31, 2024	Nov. 30, 2025	Nov. 30, 2024
Basic Earnings per Share
Net income	$ 495,343	$ 491,140	$ 448,495	$ 452,033	$ 986,483	$ 900,528
Less: net income allocated to participating securities	1,606		1,585		3,186	3,182
Net income available to common shareholders	$ 493,737		$ 446,910		$ 983,297	$ 897,346
Basic weighted average common shares outstanding (in shares)	401,484		403,581		402,391	403,489
Basic earnings per share (in dollars per share)	$ 1.23		$ 1.11		$ 2.44	$ 2.22
Diluted Earnings per Share
Net income	$ 495,343	$ 491,140	$ 448,495	$ 452,033	$ 986,483	$ 900,528
Less: net income allocated to participating securities	1,606		1,585		3,186	3,182
Net income available to common shareholders	$ 493,737		$ 446,910		$ 983,297	$ 897,346
Basic weighted average common shares outstanding (in shares)	401,484		403,581		402,391	403,489
Effect of dilutive securities - employee stock options (in shares)	4,949		7,086		5,483	7,124
Diluted weighted average common shares outstanding (in shares)	406,433		410,667		407,874	410,613
Diluted earnings per share (in dollars per share)	$ 1.21		$ 1.09		$ 2.41	$ 2.19