Condensed Consolidated Statements of Changes in Common Stockholders' Investment (Parenthetical) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Aug. 31, 2021 |
Aug. 31, 2020 |
|
| Statement Of Stockholders Equity [Abstract] | ||
| Cash dividends declared, per share | $ 1.50 | $ 1.30 |
| Other comprehensive income, tax benefit | $ 0 | $ 3 |
| Purchase of treasury stock | 1,900,000 | 0.0 |
| Employee incentive plans and other, shares issued | 600,000 | 1,000,000.0 |
| X | ||||||||||
- Definition Aggregate dividends declared during the period for each share of common stock outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of tax expense (benefit) allocated to other comprehensive income (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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