Capital Markets (Details) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2020 USD ($) $ / shares	Jun. 30, 2020 USD ($) $ / shares shares
Class of Stock [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.3825	$ 1.5150
Stock Repurchase Program, Authorized Amount | $	$ 150.0	$ 150.0
Number of common shares repurchased | shares		4,066,716
Treasury Stock, Value, Acquired, Cost Method | $		$ 106.0
Series C Preferred Shares [Member]
Class of Stock [Line Items]
Preferred Stock, Dividends Per Share, Declared	$ 0.359375	$ 0.71875
Preferred Stock, Dividend Rate, Percentage		5.75%
Series E Preferred Shares [Member]
Class of Stock [Line Items]
Preferred Stock, Dividends Per Share, Declared	0.5625	$ 1.125
Preferred Stock, Dividend Rate, Percentage		9.00%
Series G Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Dividends Per Share, Declared	$ 0.359375	$ 0.71875
Preferred Stock, Dividend Rate, Percentage		5.75%