Statements of Consolidated Changes in Equity (Parenthetical) - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Class of Stock [Line Items] | Ìý | Ìý | Ìý |
| Preferred stock dividends per share | $ 0.00 | $ 0.00 | $ 1.32 |
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Aggregate dividends paid during the period for each share of preferred stock outstanding. No definition available.
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