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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]      
Offering costs     $ 7.1
Cash dividends declared, common stock (USD per share) $ 0.92 $ 0.88 $ 0.84
Cash dividends declared, preferred stock (USD per share) $ 1.84 $ 1.76 $ 0.42