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, 2018								329		1,272
Beginning balance at May. 31, 2018	$ 9,812		$ 6,384	$ (92)	$ 3,517			$ 0		$ 3
Beginning balance (Accounting Standards Update 2016-16) at May. 31, 2018		$ (507)				$ (507)
Beginning balance (Accounting Standards Update 2014-09) at May. 31, 2018		$ 23				$ 23
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised (in shares)										18
Stock options exercised	539		539
Conversion to Class B Common Stock (in shares)								(14)		14
Conversion to Class B Common Stock	0
Repurchase of Class B Common Stock (in shares)										(54)
Repurchase of Class B Common Stock	(4,283)		(227)		(4,056)
Dividends on common stock and preferred stock	(1,360)				(1,360)
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	139		142		(3)
Stock-based compensation	325		325
Net income	4,029				4,029
Other comprehensive income (loss)	$ 323			323
Accounting Standards Update [Extensible List] | Accounting Standards Update 2016-16	Accounting Standards Update 2016-16
Accounting Standards Update [Extensible List] | Accounting Standards Update 2014-09	Accounting Standards Update 2014-09
Ending Balance (in shares) at May. 31, 2019								315		1,253
Ending balance at May. 31, 2019	$ 9,040		7,163	231	1,643			$ 0		$ 3
Ending balance (Accounting Standards Update 2016-02) at May. 31, 2019	(1)				(1)
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)
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-02
Ending Balance (in shares) at May. 31, 2020							315	315	1,243	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
Conversion to Class B Common Stock	0
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