Condensed Consolidated Statements Of Equity (Parenthetical) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Common dividend per share	$ 0.650	$ 0.610
6.75% Series D Preferred Shares [Member]
Preferred dividend per share		$ 13.08
6.5% Series F Preferred Shares [Member]
Preferred dividend per share	$ 81.25	$ 78.99