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						9 Months Ended
	Feb. 28, 2026	Nov. 30, 2025	Aug. 31, 2025	Feb. 28, 2025	Nov. 30, 2024	Aug. 31, 2024	Feb. 28, 2026	Feb. 28, 2025
Basic Earnings per Share
Net income	$ 502,496	$ 495,343	$ 491,140	$ 463,497	$ 448,495	$ 452,033	$ 1,488,979	$ 1,364,025
Less: net income allocated to participating securities	1,597			1,629			4,709	4,791
Net income available to common shareholders	$ 500,899			$ 461,868			$ 1,484,270	$ 1,359,234
Basic weighted average common shares outstanding (in shares)	400,040			403,769			401,622	403,568
Basic earnings per share (in dollars per share)	$ 1.25			$ 1.14			$ 3.70	$ 3.37
Diluted Earnings per Share
Net income	$ 502,496	$ 495,343	$ 491,140	$ 463,497	$ 448,495	$ 452,033	$ 1,488,979	$ 1,364,025
Less: net income allocated to participating securities	1,597			1,629			4,709	4,791
Net income available to common shareholders	$ 500,899			$ 461,868			$ 1,484,270	$ 1,359,234
Basic weighted average common shares outstanding (in shares)	400,040			403,769			401,622	403,568
Effect of dilutive securities – employee stock options (in shares)	4,677			6,538			5,214	6,924
Diluted weighted average common shares outstanding (in shares)	404,717			410,307			406,836	410,492
Diluted earnings per share (in dollars per share)	$ 1.24			$ 1.13			$ 3.65	$ 3.31