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Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Cash dividends declared |  |  |
Common stock, dividend per share (in dollars per share) | $ 1.72 | $ 1.64 | $ 1.48
Series B [Member] |  |  |
Cash dividends declared |  |  |
Preferred stock, dividend per share (in dollars per share) | 45.81 | 52.00 | 52.00
Series C [Member] |  |  |
Cash dividends declared |  |  |
Preferred stock, dividend per share (in dollars per share) | $ 52.93 | $ 49.00 | $ 49.00

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