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Consolidated Statement of Changes in Equity (Parenthetical) $ in Millions |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Aug. 19, 2022 $ / shares shares | Sep. 13, 2021 $ / shares shares | Dec. 31, 2022 USD ($) shares | Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 USD ($) shares | Nov. 01, 2022 shares | Sep. 01, 2020 shares
Par value less than $.5 million at each date | $ |  |  | $ 0.5 | $ 0.5 | $ 0.5 |  |
Common stock held in treasury at cost (shares) |  |  | 142,000,000 | 123,000,000 |  |  |
Common stock |  |  |  |  |  |  |
Common stock activity, shares |  |  | 500,000 | 500,000 | 500,000 |  |
Series Q Preferred Stock |  |  |  |  |  |  |
Treasury stock, preferred (shares) |  |  |  |  |  |  | 4,800
Depositary Shares |  |  |  |  |  |  |
Common stock held in treasury at cost (shares) |  |  |  |  |  | 60,000,000 | 19,200,000
Series T Preferred Stock |  |  |  |  |  |  |
Common stock activity, shares |  | 1,500,000 |  |  |  |  |
Depositary shares, conversion ratio |  | 0.01 |  |  |  |  |
Preferred stock, dividend rate, percentage |  | 3.40% |  |  |  |  |
Preferred stock, par value (in dollars per share) | $ / shares |  | $ 1 |  |  |  |  |
Series V Preferred Stock |  |  |  |  |  |  |
Common stock activity, shares | 1,250,000 |  |  |  |  |  |
Depositary shares, conversion ratio | 0.01 |  |  |  |  |  |
Preferred stock, dividend rate, percentage | 6.20% |  |  |  |  |  |
Preferred stock, par value (in dollars per share) | $ / shares | $ 1 |  |  |  |  |  |
Series P Preferred Stock |  |  |  |  |  |  |
Treasury stock, preferred (shares) |  |  |  |  |  | 15,000 |
Depositary shares, conversion ratio |  |  |  |  |  | 0.01 |

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