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Statements Of Consolidated Equity (Parenthetical) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Common Stock, Dividends, Per Share, Declared | $ 0.44 | $ 0.42
Series A Preferred Stock |  |
Preferred Stock, Liquidation Preference, Value | $ 400 | $ 400
Series B Preferred Stock |  |
Preferred Stock, Liquidation Preference, Value | $ 500 | $ 500

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