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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Investment in marketable equity securities at cost | $ 75 | $ 75
Investment securities available for sale at cost | 17,836 | 9,967
Investment securities held to maturity at fair value | $ 8,152 | $ 8,795
Preferred stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Preferred stock, shares authorized (in shares) | 20,000,000 | 10,000,000
Class A Common Stock |  |
Common stock, par value (in dollars per share) | $ 1 | $ 1
Common stock, shares authorized (in shares) | 32,000,000 | 16,000,000
Common stock, shares issued (in shares) | 13,514,918 | 13,501,017
Common stock, shares outstanding (in shares) | 13,514,918 | 13,501,017
Class B Common Stock |  |
Common stock, par value (in dollars per share) | $ 1 | $ 1
Common stock, shares authorized (in shares) | 2,000,000 | 2,000,000
Common stock, shares issued (in shares) | 1,005,185 | 1,005,185
Common stock, shares outstanding (in shares) | 1,005,185 | 1,005,185

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