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Stock-Based Compensation - Total Stock-Based Compensation Expense (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefit related to stock-based compensation expense	$ 87	$ 108	$ 273	$ 189
Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 170	189	$ 306	325
Stock Incentive Plan \| Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)	798,000,000		798,000,000
Stock options \| Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 81	107	$ 146	177
ESPPs \| Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	14	17	29	35
Restricted Stock and Restricted Stock Units \| Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 75	$ 65	$ 131	$ 113