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Condensed Consolidated Statements of Changes in Common Stockholders' Investment (Parenthetical) - USD ($) $ in Millions | 3 Months Ended
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Aug. 31, 2022 | Aug. 31, 2021
Statement of Stockholders' Equity [Abstract] |  |
Cash dividends declared, per share | $ 2.30 | $ 1.50
Other comprehensive income, tax benefit | $ 18 | $ 0
Purchase of treasury stock | 0.0 | 1,900,000
Employee incentive plans and other, shares issued | 700,000 | 600,000

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