Condensed Consolidated Statements Of Equity (Unaudited) (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Common dividend (in dollars per share)	$ 1.035	$ 0.975
6.5% Series F Preferred Shares [Member]
Preferred dividend (in dollars per share)	$ 64.55	$ 121.88