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Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares | 3 Months Ended
--- | ---
Nov. 30, 2020 | Aug. 31, 2020 | Nov. 30, 2019 | Aug. 31, 2019
Statement Of Stockholders Equity [Abstract] |  |  |  |
Dividends declared and paid per share | $ 0.38 | $ 0.36 | $ 0.36 | $ 0.35

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- Definition Common stock dividends declared and paid per share. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration