Equity (Schedule of Dividends Declared) (Details) - $ / shares	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Common Stock, Dividends, Per Share, Declared	$ 0.90	$ 1.1025	$ 1.1025	$ 1.1025	$ 2.0025	$ 2.205
Declared December 15, 2020
Common Stock, Dividends, Per Share, Declared					1.1025
Declared March 12, 2021
Common Stock, Dividends, Per Share, Declared					1.1025
Declared June 3, 2021
Common Stock, Dividends, Per Share, Declared					0.90
Declared November 7, 2019
Common Stock, Dividends, Per Share, Declared					1.05
Declared February 19, 2020
Common Stock, Dividends, Per Share, Declared					1.1025
Declared June 15, 2020
Common Stock, Dividends, Per Share, Declared					$ 1.1025