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Consolidated Statements of Changes in Shareholders' Equity - Unaudited (Parenthetical) - $ / shares | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series C, par value $1.00 per share |  |
Preferred stock, dividends, per share, cash paid (usd per share) | $ 0.4375 | $ 0.4375
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series D, par value $1.00 per share |  |
Preferred stock, dividends, per share, cash paid (usd per share) | 0.40625 | 0.40625
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series E, par value $1.00 per share |  |
Preferred stock, dividends, per share, cash paid (usd per share) | 0.403125 | 0.403125
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series F, par value $1.00 per share |  |
Preferred stock, dividends, per share, cash paid (usd per share) | $ 0.375 | $ 0.375

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