Consolidated Statements of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	CAPITAL IN EXCESS OF STATED VALUE	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	RETAINED EARNINGS (DEFICIT)	RETAINED EARNINGS (DEFICIT) Cumulative Effect, Period of Adoption, Adjustment	Class A Common Stock	Class A Common Stock COMMON STOCK	Class B Common Stock	Class B Common Stock COMMON STOCK
Beginning balance (in shares) at May. 31, 2019								315		1,253
Beginning balance at May. 31, 2019	$ 9,040	$ (1)	$ 7,163	$ 231	$ 1,643	$ (1)		$ 0		$ 3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised (in shares)										20
Stock options exercised	703		703
Repurchase of Class B Common Stock (in shares)										(34)
Repurchase of Class B Common Stock	(3,033)		(161)		(2,872)
Dividends on common stock and preferred stock	(1,491)				(1,491)
Issuance of shares to employees, net of shares withheld for employee taxes (in shares)										4
Issuance of shares to employees, net of shares withheld for employee taxes	156		165		(9)
Stock-based compensation	429		429
Net income	2,539				2,539
Other comprehensive income (loss)	(287)			(287)
Ending balance (in shares) at May. 31, 2020								315		1,243
Ending balance at May. 31, 2020	8,055		8,299	(56)	(191)			$ 0		$ 3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised (in shares)										21
Stock options exercised	954		954
Conversion to Class B Common Stock (in shares)								(10)		10
Repurchase of Class B Common Stock (in shares)										(5)
Repurchase of Class B Common Stock	(650)		(28)		(622)
Dividends on common stock and preferred stock	(1,692)				(1,692)
Issuance of shares to employees, net of shares withheld for employee taxes (in shares)										4
Issuance of shares to employees, net of shares withheld for employee taxes	86		129		(43)
Stock-based compensation	611		611
Net income	5,727				5,727
Other comprehensive income (loss)	(324)			(324)
Ending balance (in shares) at May. 31, 2021							305	305	1,273	1,273
Ending balance at May. 31, 2021	12,767		9,965	(380)	3,179			$ 0		$ 3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised (in shares)										17
Stock options exercised	924		924
Repurchase of Class B Common Stock (in shares)										(27)
Repurchase of Class B Common Stock	(3,994)		(186)		(3,808)
Dividends on common stock and preferred stock	(1,886)				(1,886)
Issuance of shares to employees, net of shares withheld for employee taxes (in shares)										3
Issuance of shares to employees, net of shares withheld for employee taxes	88		143		(55)
Stock-based compensation	638		638
Net income	6,046				6,046
Other comprehensive income (loss)	698			698
Ending balance (in shares) at May. 31, 2022							305	305	1,266	1,266
Ending balance at May. 31, 2022	$ 15,281		$ 11,484	$ 318	$ 3,476			$ 0		$ 3