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Statement of Changes in Consolidated Equity (Parenthetical) - $ / shares | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Common Stock, dividends declared per share (usd per share) | $ 0.06 | $ 0.24 | $ 0.36 | $ 0.12
Preferred Class A |  |  |  |
Preferred, dividends per share (usd per share) |  | 3.75 | 3.75 | 3.75
Preferred Class B |  |  |  |
Preferred, dividends per share (usd per share) |  | $ 20.1563 | $ 26.875 | $ 26.8750

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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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