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Shareholders’ Equity (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Stockholders' Equity Note [Abstract]        
Dividends declared per common share (in dollars per share) $ 0.3175 $ 1.270 $ 1.270 $ 1.225
Dividends payable     $ 27.3