v3.26.1
INVESTMENTS - Schedule of Investments in Debt Securities (Details) - Fixed-income securities - USD ($)
$ in Millions
May 31, 2026
May 31, 2025
Debt Securities, Available-for-Sale [Line Items]    
Gross Unrealized, Cost $ 236 $ 69
Gross Unrealized, Gains 0 1
Gross Unrealized, Losses 0 0
Gross Unrealized, Estimated Fair Value $ 236 $ 70