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Statement of Changes in Consolidated Equity (unaudited) (Parenthetical) - $ / shares | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Common stock, dividends per share | $ 0.12 | $ 0.18 | $ 0.24 | $ 0.36
Preferred Class A [Member] |  |  |  |
Preferred, dividends per share | 1.875 | 1.875 | 3.75 | 3.75
Preferred Class B [Member] |  |  |  |
Preferred, dividends per share | $ 6.71875 | $ 6.71875 | $ 20.1563 | $ 20.1563

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References 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 + Details
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