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CONSOLIDATED STATEMENTS OF CHANGES IN COMMON STOCK EQUITY (Parenthetical) - $ / shares | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Dividends per Common Share | $ 1.46 | $ 1.44 | $ 1.42
Common Stock, Shares issued | 25,932 |  | 32,095
Dividend and Distribution Reinvestment and Share Purchase Plan |  |  |
Common Stock, Shares issued |  | 26,256 |
Registered Public Offering |  |  |
Common Stock, Shares issued |  | 690,000 |

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