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Supplemental Financial Statement Data (Narrative) (Details) - $ / shares | 3 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2019 | Aug. 31, 2019 | May 31, 2019 | Feb. 28, 2019 | Nov. 30, 2018 | Aug. 31, 2018 | May 31, 2018 | Feb. 28, 2018 | Nov. 30, 2019 | Nov. 30, 2018 | Nov. 30, 2017
Supplemental Financial Statement Data [Abstract] |  |  |  |  |  |  |  |  |  |  |
Dividends paid per share (usd per share) | $ 0.57 | $ 0.57 | $ 0.57 | $ 0.57 | $ 0.52 | $ 0.52 | $ 0.52 | $ 0.52 | $ 2.28 | $ 2.08 | $ 1.88
Common Stock, Dividends, Per Share, Declared | $ 1.19 | $ 0.57 | $ 0.57 | $ 0 | $ 1.09 | $ 0.52 | $ 0.52 | $ 0 | $ 2.33 | $ 2.13 | $ 1.93

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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