Condensed Consolidated Statements of Equity (Unaudited) (Parenthetical) - $ / shares	6 Months Ended
Jun. 30, 2016	Jun. 30, 2015
Common dividend (in dollars per share)	$ 0.730	$ 0.690
6.5% Series F Preferred Shares [Member]
Preferred dividend (in dollars per share)		$ 64.55

Aggregate dividends paid during the period for each share of common stock outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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