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CONSOLIDATED STATEMENTS OF CHANGES IN COMMON STOCKHOLDERS' INVESTMENT (Parenthetical) - USD ($)
shares in Millions, $ in Millions
3 Months Ended
Aug. 31, 2025
Aug. 31, 2024
Statement of Stockholders' Equity [Abstract]    
Cash dividends declared (in dollars per share) $ 2.90 $ 2.76
Other comprehensive loss, tax $ 5 $ (3)
Purchase of common stock (in shares) 2.2 3.4
Employee incentive plans and other, shares issued (in shares) 0.3 2.2