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CONSOLIDATED STATEMENTS OF CHANGES IN COMMON STOCKHOLDERS' INVESTMENT (Parenthetical) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Nov. 30, 2025
Nov. 30, 2024
Nov. 30, 2025
Nov. 30, 2024
Statement of Stockholders' Equity [Abstract]        
Cash dividends declared (in dollars per share) $ 1.45 $ 1.38 $ 4.35 $ 4.14
Other comprehensive loss, tax (expense)/benefit $ (6) $ 2 $ (1) $ (1)
Purchase of common stock (in shares) 1.1 3.7 3.3 7.1
Employee incentive plans and other, shares issued (in shares) 0.2 0.2 0.5 2.4