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Condensed Consolidated Statements of Changes in Equity (Unaudited) (Parentheticals) (Parent [Member], USD $) | 6 Months Ended
--- | ---
Jun. 30, 2012 | Jun. 30, 2011
Dividends, per common share | $ 0.38 | $ 0.36
Series F Preferred Stock [Member] |  |
Dividends, per Depositary share | $ 0.8312 | $ 0.8312
Series G Preferred Stock [Member] |  |
Dividends, per Depositary share | $ 0.9688 | $ 0.9688
Series H Preferred Stock [Member] |  |
Dividends, per Depositary share | $ 0.8625 | $ 0.8625
Series I Preferred Stock [Member] |  |
Dividends, per Depositary share | $ 0.4208 |

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: 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=6959260&loc=d3e187085-122770 + Details
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- Definition Aggregate dividends paid during the period for each share of preferred stock outstanding. + References No definition available. + Details
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