STOCKHOLDERS' EQUITY (Details) - USD ($) $ in Millions	3 Months Ended
STOCKHOLDERS' EQUITY (Details) - USD ($) $ in Millions	Aug. 31, 2026	Aug. 31, 2025
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	$ 1,127	$ 1,124
Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	98	88
Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	667	647
Location, Statement of Income, Balance [Axis]: us-gaap:SellingAndMarketingExpense
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	171	177
Location, Statement of Income, Balance [Axis]: orcl:CloudAndSoftwareExpenses
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	134	156
Location, Statement of Income, Balance [Axis]: orcl:HardwareExpenses
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	6	7
Location, Statement of Income, Balance [Axis]: orcl:ServicesExpense
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	$ 51	$ 49