Operating Segments and Related Information - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Regional Reporting Disclosure [Line Items]
Revenues	$ 44,538	$ 37,403	$ 39,117
UNITED STATES
Regional Reporting Disclosure [Line Items]
Revenues	17,363	14,625	$ 16,091
Long-lived assets attributable to operations (Domestic)	4,927	5,114
BELGIUM
Regional Reporting Disclosure [Line Items]
Long-lived assets attributable to operations (Domestic)	676	606
CHINA
Regional Reporting Disclosure [Line Items]
Long-lived assets attributable to operations (Domestic)	$ 518	$ 457