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Consolidated Statement of Changes in Equity (Parentheticals) - $ / shares |  |  |  |  | 12 Months Ended
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Dec. 14, 2021 | Sep. 21, 2021 | Jun. 29, 2021 | Mar. 23, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Statement of Stockholders' Equity [Abstract] |  |  |  |  |  |  |
Cash dividends per common share | $ 1.45 | $ 1.45 | $ 1.45 | $ 1.25 | $ 5.60 | $ 4.83 | $ 4.14

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